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Posts Tagged ‘sensor’

Sony is hiring engineers to help strengthen its image sensor business

24 Feb

Reuters reports that Sony is planning to deploy 40 percent of its new engineer hires in Japan at its chip business which also includes the manufacturing of image sensors. The company is hoping to grow the division with more demand coming from a range of sectors, including mobile and automotive.

Overall Sony is projecting to hire 320 new engineers in Japan in 2019 and the same number again the next year, which is an increase of 70 from 2018. These numbers are Japan-only, so don’t take into account new engineering positions at international locations.

The hiring plans align with Sony’s investment of approximately $ 5.4 billion into its image sensor business over the next three years, which accounts for half of of the group’s planned capital expenditures.

Sony is already the market leader for image sensors by quite some margin, controlling more than half of the imaging sensor market for smartphones. The division is also an important contributor to profit within Sony, despite the company cutting its annual profit outlook for imaging sensors this month to 130 billion yen due to weakening global demand for smartphones. This figure still accounts for 15 percent of the Sony group’s overall profit.

Articles: Digital Photography Review (dpreview.com)

 
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Ricoh GR III, with updated lens, 24MP APS-C sensor and in-body IS to ship in March

22 Feb

Five months after its development announcement, the Ricoh GR III will be shipping this March for $ 899. Unlike the GR II, which was a very minor upgrade to the original, the major components on the GR III are all-new.

The controls have received a major shake-up as the GR III becomes the first in the series to use a touchscreen. The screen is a 3.0″, 1.04M-dot LCD, with all of the usual features like AF point selection, menu navigation and image review onboard.

It also gains image stabilization, with a 3-axis sensor-shift system offering shake reduction rated at up to four stops. This ‘SR’ system can also be used to simulate an AA filter for when moiré reduction is desired. And there’s now an ultrasonic dust reduction system for the sensor, which is perhaps a nod to the dust problems that some encountered on the GR I and II.

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The GR III’s autofocus system has been overhauled, with the addition of on-sensor phase detection. This, along with a redesigned lens, gives us hope that the GR II’s autofocus will be quicker than its predecessors. Ricoh is yet to provide any technical details but says it will be ‘faster and more responsive.’

The GR III’s 28mm equiv. F2.8 lens has six elements in four groups, with two elements being aspherical. The lens can now focus as close as 6cm (2.4″), compared to 10cm (3.9″) on the previous models. The GR III continues to offer a built-in 2-stop ND filter.

The resolution of the GR III’s APS-C sensor has been bumped from 16MP to 24MP, with a fully expanded ISO range of 100 – 102,400. The GR III can now record 1080/60p video, but no 4K. Ricoh has added a Type-C USB 3.0 port on the camera (which can be used to charge the battery,) and connectivity options now include Bluetooth in addition to Wi-Fi.

Two things that the GR III lost are its built-in flash and a fair amount of its battery life. The latter has plunged from 320 shots to 200 shots per charge – a 38% drop – despite using a higher capacity battery. More than likely, the addition of in-body IS puts the biggest hit on battery life.

As mentioned above, the GR III will be yours to purchase in March for $ 899. A new 0.75x wide-angle adapter (GW-4) will also be available for $ 249.

Press Release

Ricoh launches RICOH GR III high-end, compact digital camera

Newest model in the popular RICOH GR series delivers exceptional image quality in a smaller, lightweight body, making it ideal for street photography

WEST CALDWELL, NJ, February 21, 2019 – Ricoh Imaging Americas Corporation today announced the launch of the highly anticipated RICOH GR III camera. The new camera is the latest model in the RICOH GR series, a lineup of high-end digital cameras providing exceptional image quality in a compact, lightweight body ideal for street photography, travel and capturing candid images.

The RICOH GR III features a newly designed lens, image sensor and imaging engine that further upgrade image quality, enhance functionality and improve usability. The 18.3mm F2.8 lens delivers exceptional imaging performance with a slim design, consisting of six optical elements in four groups, while retaining the 28mm angle of view. It produces the clearest, sharpest images in GR-series history while reducing distortion and chromatic aberration. It also comes equipped with a macro shooting capability with a minimum focusing distance of six centimeters.

In keeping with the GR-series concept of packaging high image quality in a compact design, the RICOH GR III camera body is smaller than its predecessor, and is equipped with a large APS-C-size CMOS image sensor with approximately 24.24 effective megapixels to produce high-resolution images. Its short start-up time of approximately 0.8 seconds allows for quick, responsive shooting. The camera’s high-definition LCD monitor features touchscreen operation, offering intuitive control of various camera functions right on the screen.

The camera also features a high-speed hybrid autofocus system, built-in shake reduction, in- camera image finishing options, USB Type-CTM, Bluetooth and wireless LAN connectivity options. An accessory wide-angle conversion lens designed exclusively for use with the RICOH GR III is also available. The GW-4 Wide Conversion Lens expands the angle of view to 21mm ultra-wide angle.

“The Ricoh GR III is the ultimate street camera,” said William Hereford, a Brooklyn-based pro photographer, who has been shooting with GR series cameras for years. “The image quality and ease of use are equally amazing. I literally don’t leave my house without this camera. The GR III fits perfectly both in my hand and my pocket, so it is always available to capture a moment.”

Hereford says that the image quality is so great, that photos taken with his GR cameras have the potential to be used in national ad campaigns and magazine articles.

Designed to be the ultimate street photography camera, the RICOH GR III is a totally new breed of GR camera that will give the user new and different creative possibilities.

| Pricing and Availability |

The RICOH GR III will be shipping in March 2019 and will be available at www.us.ricoh- imaging.com and retail outlets nationwide. Price is $ 899.95 for the camera, $ 249.95 for the GW-4 Wide Conversion Lens.

Ricoh GR III specifications

Price
MSRP $ 899 / £799
Body type
Body type Large sensor compact
Body material Magnesium alloy
Sensor
Max resolution 6000 x 4000
Image ratio w:h 1:1, 3:2
Effective pixels 24 megapixels
Sensor photo detectors 25 megapixels
Sensor size APS-C (23.5 x 15.6 mm)
Sensor type CMOS
Color space sRGB, Adobe RGB
Color filter array Primary color filter
Image
White balance presets 8
Custom white balance Yes
Image stabilization Sensor-shift
CIPA image stabilization rating 4 stop(s)
Uncompressed format RAW
File format
  • JPEG (Exif v2.3)
  • Raw (14-bit DNG)
Optics & Focus
Focal length (equiv.) 28 mm
Maximum aperture F2.8–16
Autofocus
  • Contrast Detect (sensor)
  • Phase Detect
  • Multi-area
  • Center
  • Selective single-point
  • Tracking
  • Single
  • Continuous
  • Touch
  • Face Detection
  • Live View
Autofocus assist lamp Yes
Manual focus Yes
Normal focus range 10 cm (3.94)
Macro focus range 6 cm (2.36)
Screen / viewfinder
Articulated LCD Fixed
Screen size 3
Screen dots 1,037,000
Touch screen Yes
Screen type TFT LCD
Live view Yes
Viewfinder type Optical (optional)
Photography features
Minimum shutter speed 30 sec
Maximum shutter speed 1/4000 sec
Exposure modes
  • Program
  • Aperture priority
  • Shutter priority
  • Manual
Built-in flash No
External flash Yes (via hot shoe)
Flash modes Auto, Flash On, Flash On+Red-eye, Slow-speed Sync, Slow Sync+Red-eye
Flash X sync speed 1/4000 sec
Drive modes
  • Single Frame
  • Continuous Shooting
  • Bracketing
  • Multi-exposure
  • Interval Shooting
  • Interval Composite
Continuous drive 4.0 fps
Self-timer Yes
Metering modes
  • Multi
  • Center-weighted
  • Highlight-weighted
  • Spot
Exposure compensation ±5 (at 1/3 EV steps)
Videography features
Format MPEG-4, H.264
Modes
  • 1920 x 1080 @ 60p, MOV, H.264, Linear PCM
  • 1920 x 1080 @ 30p, MOV, H.264, Linear PCM
  • 1920 x 1080 @ 24p, MOV, H.264, Linear PCM
Microphone Stereo
Speaker Mono
Storage
Storage types Internal, SD/SDHC/SDXC (UHS-I supported)
Storage included 2GB
Connectivity
USB USB 3.0 (5 GBit/sec)
USB charging Yes
HDMI No
Microphone port No
Headphone port No
Wireless Built-In
Wireless notes 802.11b/g/n + Bluetooth
Remote control Yes (via smartphone)
Physical
Battery Battery Pack
Battery description DB-110 lithium-ion battery & USB charger
Battery Life (CIPA) 200
Weight (inc. batteries) 257 g (0.57 lb / 9.07 oz)
Dimensions 109 x 62 x 33 mm (4.29 x 2.44 x 1.3)
Other features
Orientation sensor Yes
Timelapse recording Yes
GPS None

Articles: Digital Photography Review (dpreview.com)

 
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Almalence compares Google’s Super Resolution Zoom to its own Super Sensor solution

05 Feb

Optical zoom lenses with 2x or even 3x magnification factor are one of the the latest trends on high-end smartphones. However, you don’t necessarily need a dedicated lens to achieve better zoom results than you get from a standard digital zoom.

In the world of computational photographer one solution to getting around optical zoom is to combine a multitude of frames to capture as much detail as possible and apply some clever processing algorithms. While not nearly as clear as optical zoom — yet — these methods result in final images that aren’t far off an optical system. One such example is Google’s Super Resolution Zoom on the Pixel 3 smartphone. Through this method, the Pixel 3 can produce image detail far superior to a simple digital zoom.

But Google isn’t the only company working on this. Computational imaging company Almalence also provides imaging software solutions to mobile device and camera makers with a similar solution called SuperSensor, and it’s shown off just how capable its system is.

On its blog Almalence has compared Google’s Super Resolution to its own Super Sensor technology by installing the latter on a Google Pixel 3 and capturing a couple of test scenes.

The company’s conclusion is that Google’s Super Resolution Zoom ‘reveals some details that are indistinguishable in the normal image,’ but ‘it’s still not the best of what super resolution can achieve.’

In the 100% crops above you can see Google’s system is doing a much better job at magnifying the text in the book that served as a test subject. However, at closer inspection you’ll also see that the characters in the text is better preserved in the image captured by the Almalence system, despite an overall softer appearance.

In the original article you can find another comparison scene and all samples for download at original size, so you can form your own opinions about the performance of the two systems. In any case it’s good to see how far purely software-based systems have come when compared to a simple digital zoom. Combining such systems with optical zoom lenses should open up completely now possibilities on mobile devices.

Articles: Digital Photography Review (dpreview.com)

 
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‘Sensor size isn’t the answer’ – Olympus exec explains the thinking behind E-M1X

31 Jan

Aki Murata, VP of sales and marketing for Olympus America.

Long before the new Olympus OM-D E-M1X was officially announced, we had the opportunity to sit down with Aki Murata, VP of sales and marketing for Olympus America, to talk about the upcoming camera. While some details of the final specification were yet to be finalized (our conversation happened in October) Mr Murata was keen to explain the concept behind the pro-oriented E-M1X, and why in his opinion it doesn’t make sense for Olympus to go full-frame.

The following interview has been edited slightly for clarity and flow.


What kind of customers are you hoping to attract with the E-M1X?

We believe that there will be three types of users. One is users stepping up from existing M43 cameras, like the E-M1 Mark II. That’s a good camera, but in certain circumstances it doesn’t work for sports photography. For example having a joystick on the vertical and horizontal grips – that’s the kind of thing that’s needed for wildlife and sports. That’s the number one target group.

Second is photographers who are stepping up from APS-C, like Canon 7D users. Those people are buying APS-C to make use of tele lenses, to get longer focal lengths. And the system is smaller than full-frame. Those people aspire to EOS-1D X type products but they’re not affordable. And they’re big, it’s a hassle. This camera will create new demand. You can shoot at long focal lengths and still hand-hold.

For us, sensor size isn’t the answer

Obviously current APS-C users will be tough. ‘Step-up’ for some of them means going to full-frame. But we want to say to those people think again – what kind of pictures do you want to take? For us, sensor size isn’t the answer. We want to convey that message to the market. Full-frame is definitely a buzzword in the market, but maybe after carrying around full-frame lenses they’ll find they’re too big and give up!

The third group is people who are making an additional purchase, in addition to 5-series, 1D-series or D5 cameras who want to try the new system. Because what this camera does is basically the same. People may think that they need full-frame but once they’ve seen this camera’s performance I don’t think that that will be an argument, considering the difference in size and weight.

Arguably, the Olympus OM-D E-M1X represents the company’s most serious attempt to court professional photographers since the film-era OM-4, released in 1986.

The AF tracking will be very important for those demographics – how did you benchmark the new camera compared to competitors?

We don’t have any numbers around that, but in order to develop this camera’s AF system we gave it to many professionals here [in the US] and abroad to get their opinions about AF performance. So we’ve changed the algorithms a lot. It’s not so much about benchmarking about other cameras, more about listening to the voices of the professionals. And obviously the AI technologies.

Ultimate reliability goes far beyond strong build, and resilience to the elements

You said that the camera has been in testing for a long time – can you tell us how long it’s been in development, from the initial concept?

After the E-M1 II, we started to get feedback from the market. That was the first step. Our R&D guys wanted to develop the camera for ultimately reliability. The E-M1 was the first challenge, then the Mark II, when we really wanted to improve autofocus accuracy. But after listening to the pros we realised we had to make an even bigger effort to achieve maximum reliability. That was the starting point, when we were planning the new model.

‘Ultimate Reliability’ is a primary goal of Olympus’s R&D philosophy. This philosophy was established 48 years ago in a company memorandum created by Yosihisa Maitani [creator of the original OM product line]. This memorandum establishes three main R&D goals: compact, lightweight and ultimate reliability. Ultimate reliability goes far beyond strong build, and resilience to the elements, it also speaks to the cameras performance and consistent operation. This R&D policy is still followed today and is a cornerstone of our operation.

Is it very important to you that professionals use Olympus cameras?

Absolutely. Our target is that Olympus gear will be trusted by professionals. That’s what we want to achieve. And to achieve it, we need to achieve ultimate reliability. With the M43 system we want professionals to use our cameras and be satisfied by them.

Do you expect to see Olympus lenses at the 2020 olympics?

I hope so! We had the Asian olympic games a couple of months ago and that was our first time being inside the press center. There was only Olympus and one other manufacturer. We didn’t have many professional photographers there, but we had some and they came to us for professional service. That was a great first step for us.

The M.Zuiko Digital ED 150-400mm F4.5 TC1.25x IS Pro is equivalent to 300-800mm on Micro Four Thirds bodies, increasing to 375-1000mm with its built-in teleconverter activated. The lens will be available in 2020.

How will computational photography technology from smartphones change cameras in the future?

The speed of smartphone development means that those technologies can be incorporated into smartphones, first. The risk for the photo industry is that people lose interest in traditional photography because their smartphone is so good. If the next step is big lenses and huge cameras, a lot of people might just give up and use their phones instead. They’re not competitors in some ways, but in other ways they are.

How will you address that challenge?

First of all we won’t use any other mount other than Four Thirds. If we had more than one mount, that’s not really user-friendly, and we’re creating the risk that we’d lose customers. If we ask you to buy a camera and lens and then step up to another mount, you might not want to do that. We want to create one, cohesive system with M43. We know our strengths. We have a small and lightweight system, which is good for shooting telezoom lenses, outside. So we’re focusing on this area, to provide suitable products for this field of photography.

For this [kind of photography], you cannot utilize a smartphone. You need optics, and capable AF systems. This is the area we want to focus on. We think that there is growth in these areas. This differentiates us a lot compared to smartphones. We would like all users in these fields to test our product because once they do they will see how accurate the autofocus is, and we have 7.5 stops of stabilization now, you can make great images.

Many people buy $ 399 or $ 499 DSLRs and end up just abandoning them

Lastly, services – not in terms of repair, but what we can offer our customers. We are not a giant in the camera industry, we know that. So we cannot speak to all photographers, but for our users we want to provide good post-purchase experiences. This is a new vision we’ve been talking about in the past few months. If we meet in a year or two I hope that you’ll remember what I said in this meeting!

Many people buy $ 399 or $ 499 DSLRs and end up just abandoning them, because in some conditions the pictures might look worse than their phone. Unless we give proper training, information and proper hands-on experiences, it’s difficult to enjoy photography. Our responsibility is not only to create cameras, but to provide services after purchase. We’re currently thinking how we can use our current platform, or maybe a new digital platform.

The ultra-tough E-M1X is built for reliability and endurance in tough environments. Two batteries deliver a CIPA rated 800+ shots before the camera runs out of juice. In more representative shooting situations we’d expect much more.

This is a very uncluttered camera, compared to previous OM-D 1-series cameras. Does this represent a deliberate attempt to create a different kind of experience?

Many of those things come from direct feedback from photographers. They’ll tell us ‘it’s really good to have this button here, so I don’t press it by mistake’, or whatever. So we have made several changes after talking to professionals and finally we came up with the [E-M1 X]. We just wanted to make the perfect camera for them.

They didn’t want an LCD on top?

Do you need one? There are mixed feelings on that. We considered it, but the camera would become bigger and lose operability. Our R&D guys just sit next to professionals sometimes, and watch how they use the camera. That’s how they get inspiration.

This is still a fairly large camera – do you still have any interest in developing the smaller, lighter cameras?

specially last year we used a lot of R&D resources on this camera, not only because we want to have professional users, but because we wanted to add ultimate reliability to our lineup. We wanted to meet the requirement of professionals who shoot sports and wildlife. Now that [the E-M1X] has arrived, and it’s our 100th anniversary, you can expect more.

We don’t make full-frame, because we don’t believe that everyone needs it

Olympus is now the only camera manufacturer not to offer an APS-C or larger sensor. How will you differentiate your lineup in that context?

We have three strengths: Compactness and light weight, lens quality, and I.S. That combination is unique. Full-frame is kind of like a buzzword in the market, but lens size cannot be changed. If you compare the systems there are visible differences in terms of size and weight. We do what we believe is right. We don’t make full-frame, because we don’t believe that everyone needs it. For most photographers it’s better to have mobility – if you don’t have a camera with you, you can’t take the shot. We believe that our solution is better for most people. It’s good to have full-frame, but there is a need for a smaller system. This is why Maitani’s R&D philosophy is so important to us.

We believe that the market will be separated into two. One is larger, full-frame, and the other is more portable cameras and lenses. We’re happy that everyone else is going to bigger sensors, and we’re staying where we are. I’m confident, and I’m proud to say that we’re staying here. It doesn’t make sense for us to go full-frame. There is a place for full-frame, and a place for medium format, but our customers can’t [be limited to] three frames per second. There is a customer base that needs the products we offer now, and they need a compact and lightweight system.


Editors’ note: Barnaby Britton and Carey Rose

Perhaps the most striking takeaway from our conversation with Mr Murata is his confidence that Olympus is right to buck the general trend towards bigger sensors. He couldn’t have been clearer that whereas close competitors like Panasonic and Sony have opted to expand into full-frame, he isn’t interested in developing products for any mount other than Four Thirds.

It’s unusual to hear this kind of unequivocal – very specific – statement of intent from senior executives at major companies. Normally in conversations with press, we’re told that all possible doors are open ‘depending on the market’, but Mr Murata couldn’t have been clearer. “We won’t use any other mount other than Four Thirds […] we’re staying where we are”. You heard it here first.

It remains to be seen whether the E-M1X will attract the professional photographers that Olympus wants, but it’s certainly true that it can do some things that larger-format cameras cannot. There isn’t a full-frame camera on the market that can shoot Raw+JPEG frames at 60fps, or combine several frames taken in an instant to output an 80MP file. Likewise Live ND, which simulates the effect of an ND filter without the hassle of actually having to use one, and a stabilization system capable of 7.5EV of correction (thanks to a new gyro mechanism and tweaked software).

Will we see banks of Zuiko lenses on the sidelines at the Tokyo 2020 Olympics? Only time will tell

It’s quite likely, too, that the E-M1X is the toughest professional camera on the market. Durability and weather-sealing are notoriously hard to test (unless you test to destruction, which we don’t) but an officially-quoted IPX1 rating and a promise that the camera is sealed based upon experience learned from the ‘TOUGH’ series compacts is encouraging. Some DPReview commenters have balked at the E-M1X’s $ 3000 MSRP, but it’s worth remembering that this is only a little more than half the cost of a Nikon D5.

Alongside the Sony a9 (with upcoming firmware) the D5 is a benchmark camera for autofocus performance and reliability, and with the E-M1X Olympus is clearly launching a challenge for that crown. Using machine learning, Olympus’s engineers have effectively ‘trained’ a model to recognize certain subjects (automobiles, airplanes and trains, for now) and this model – which houses a large dataset – is integral to how the E-M1X’s autofocus tracking system operates. This isn’t artificial intelligence so much as machine learning (or ‘deep learning’) but if you’re shooting planes, trains or automobiles with the E-M1X you’d be forgiven for thinking otherwise.

While we’re told that some E-M1X features might be added to the E-M1 II via firmware, this predictive tracking model relies on the dual processors of the ‘X’. Will we see banks of Zuiko lenses lined up on the sidelines at the Tokyo 2020 Olympics? Only time will tell, but the E-M1X is definitely a step in the right direction.

Learn more about the new pro M43 Olympus OM-D E-M1X

Articles: Digital Photography Review (dpreview.com)

 
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Samsung launches 1/3.4″ 20MP sensor for use in smartphone front cameras and tele modules

23 Jan

Smartphone camera technology is moving faster than ever and in recent times we have seen two new developments on a variety of mid-range and high-end devices. More and more rear cameras come with secondary modules with longer focal lengths, usually a 2 or 3x zoom factor when compared to the primary shooter. At the front the latest trend are “hole punch” cameras that are pretty much hidden underneath the display and only peek through a tiny hole.

Both these trends require small sensors to enable designers and engineers to maintain the slim form factors of current premium devices. Samsung has today launched its new ISOCELL Slim 3T2 20MP 1/3.4″ sensor which comes with a 0.8?m pixel pitch and is Samsung’s smallest 20MP sensor, making it ideal for such applications.

‘The ISOCELL Slim 3T2 is our smallest and most versatile 20Mp image sensor that helps mobile device manufacturers bring differentiated consumer value not only in camera performance but also in features including hardware design,” said Jinhyun Kwon, vice president of System LSI sensor marketing at Samsung Electronics. “As the demand for advanced imaging capabilities in mobile devices continue to grow, we will keep pushing the limits in image sensor technologies for richer user experiences.’

In addition to tiny dimensions the new sensor offers, when used in front facing cameras, Samsung’s Tetracell technology, which merges four pixels to work as one for brighter exposures and less noise in low light conditions. Samsung claims Tetracell increases the color filter array’s light sensitivity to that of a 1.6?m-pixel image sensor at 5MP resolution.

For applications in rear cameras, for example in a tele-module, the sensor uses an RGB color filter array instead of Tetracell. Samsung says the sensor’s small dimensions reduce the height of the tele-camera module by around seven percent when compared to the company’s current 1/3-inch 20MP imagers. Compared to the existing 13MP sensor with the same module height, the 3T2 offers, thanks to the higher pixel count, better performance when digital zoom is thrown into the mix.

The Samsung ISOCELL Slim 3T2 is expected to be in mass production in the first quarter of this year.

Articles: Digital Photography Review (dpreview.com)

 
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Man v Dust: video highlights trials of Leica’s in-house sensor cleaning service

12 Jan

The International Leica Society has posted a video of a camera sensor being cleaned at the Leica service centre in the Wetzlar factory in Germany.

The video, taken by member Hari Subramanyam on his iPhone, shows the process of checking for dust on the sensor of his M (Typ 240) and then its removal. Well, that was what it was supposed to show, but after 20 minutes and 25 seconds the video finishes with the dust victorious and the Leica service engineer frustrated and wishing he wasn’t being recorded.

The engineer starts by cleaning the mount of the camera before using a vacuum cleaner to suck dust and debris from the shutter blades. Once that is done the in-camera dust checking function is used to detect a number of dust spots. The rubber-on-a-stick Pentax Sensor Cleaning kit is used to remove the dust as the engineer explains the process needs patience and can take anything from ten minutes to an hour.

We don’t get to see the sensor finally dust-free, as it takes a few goes and the cameraman has less patience than the engineer, but the video shows some useful steps in the process.

Articles: Digital Photography Review (dpreview.com)

 
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Redmi 7 smartphone offers Sony 48MP Quad-Bayer sensor at budget price point

10 Jan

We’ve seen Sony’s IMX586 1/2-inch 48MP sensor appear in several higher-end devices in recent months but the Redmi 7 is now the first budget device to offer the chip. The sensor isn’t really meant for outputting medium-format image resolution image files. Instead a quad-Bayer filter array allows for high-quality 12MP images with low noise levels and real-time HDR processing. The main chip is accompanied by a 5MP depth sensor for bokeh and similar effects.

Redmi, which used to be the budget line within the Xiaomi smartphone portfolio, has now been promoted to a proper sub-brand, similar to what Honor is to Xiaomi competitor Huawei. The 7 is the first device launched under this new sub-brand and does not only offer impressively looking main camera specs for the money.

You also get a 13 MP front camera, 6.3-inch Full-HD+ LCD display, Snapdragon 660 chipset a massive 4,000 mAh battery with quick charge support and a microSD slot.

In terms of RAM and storage you can choose between 3/32 GB, 4/64 GB, and 6/64 GB combinations. and there is a microSD slot as well.

The cheapest option will set you back $ 150 (CNY999) and even the largest memory version is only $ 210 (CNY1,399). Pre-orders have already started in China and shipments are scheduled for January 15. We’d expect the Redmi 7 to make the jump into the US and other regions in the nearer future. We’ll have to wait for the first samples but it looks like the Redmi 7 should be high up the list of those who want good smartphone image quality at budget pricing in 2019.

Articles: Digital Photography Review (dpreview.com)

 
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Full Frame VS Crop Sensor VS Micro Four Thirds: Camera Sensors Explained

05 Dec

The post Full Frame VS Crop Sensor VS Micro Four Thirds: Camera Sensors Explained appeared first on Digital Photography School. It was authored by Kunal Malhotra.

1 - Full Frame VS Crop Sensor VS Micro Four Thirds: Camera Sensors Explained

‘DSLR Camera, Full-Frame, Crop Sensor’- Just 3 terms which are prevalent in virtually every discussion involving photography. The two terms in use to classify sensor sizes of a DSLR camera are ‘Full-Frame’ and ‘Crop-Sensor.’ A Full-Frame camera contains a sensor size equivalent to a 35mm film format whereas a Crop-Sensor camera has a sensor size smaller than a full-frame sensor or a 35mm film format.

Micro-Four-Thirds (4/3) is a relatively new format (and term). First introduced around 2008, this sensor is slightly smaller and compact in nature. However, owing to a variety of factors, this format is now considered almost equal to, if not better than, the Crop Sensor format.

Apart from the physical size difference, there are several other points of difference between a full-frame sensor, a crop-sensor, and a micro-four-thirds sensor. Let’s take a look at a comparison between them under the following characteristics, to get an accurate understanding of their differences.

Crop Factor

As mentioned above, a full-frame camera has a 35mm sensor based on the old film-format concept. Whereas, a crop-sensor (also called APS-C) has a crop factor of 1.5x (Nikon) or 1.6x (Canon). Micro-Four-Thirds are even smaller sensors having a crop factor of 2x.

This crop factor also directly affects our field of view. Simply put, an APS-C sensor would show us a cropped (tighter) view of the same frame as compared to a full-frame sensor, and a Micro-Four-Thirds sensor would show an even tighter (more cropped) output of the same frame.

2 - Full Frame VS Crop Sensor VS Micro Four Thirds: Camera Sensors Explained

LEFT: Photo clicked using a Full-Frame camera. CENTER: Photo clicked using a Crop-Sensor camera. RIGHT: Photo clicked using a Micro-Four-Thirds camera.

Focal Length

The focal length obtained by different sensors is also directly associated with crop-factor. The focal length measurement of any given lens is based on the standard 35mm film format. Whenever we use any crop-sensor camera, its sensor crops out the edges of the frame, which effectively increases the focal length. However, this is not the case with any full-frame sensor, as there is no cropping involved with a full-frame field of view.

For example, in the Nikon eco-system, a crop-sensor camera such as the D5600 has a ‘multiplier factor’ of 1.5x. Thus, if I mount a 35mm f/1.8 lens on my Nikon D5600, it would multiply the focal length by 1.5x, thus effectively giving me a focal length output of around 52.5mm. If you mount the same lens on a full-frame Nikon body such as the D850, it gives an output of 35mm.

Similarly, if you mount a 35mm lens on a Micro-Four-Thirds sensor, which has a crop factor of 2x, it effectively doubles the focal length obtained to around 70mm.

3 - Full Frame VS Crop Sensor VS Micro Four Thirds: Camera Sensors Explained

LEFT: Photo clicked at 35mm on a Full-Frame camera. CENTER: Photo clicked at 35mm on a Crop-Sensor camera. RIGHT: Photo clicked at 35mm on a Micro-Four-Thirds camera.

Depth of Field

Similar to focal length, the aperture or f-stop measurement of a lens is based on the full-frame 35mm format. Similar to focal length, a ‘multiplier effect’ gets applied to the f-stop when using crop-sensors. As we know, the f-stop or aperture is the singular most important factor that affects the Depth of Field.

Thus, a Micro-Four-Thirds camera gives us less (shallow) Depth of Field at similar focal lengths when compared with a full-frame camera. For example, an image shot at f/1.8 on a Micro-Four-Thirds camera would give an output similar to an image shot at f/3.6 on a full-frame camera, and f/2.7 on a crop sensor camera. This is assuming that the effective focal length, and other shooting conditions, are the same.

Low Light Performance

Generally, full-frame cameras provide not only better low light & high ISO performance, but a better dynamic range. These factors combined eventually produces a much better image output than any crop-sensor camera can achieve.

Full-frame cameras are capable of capturing the most light and will almost always out-perform an APS-C or Micro-Four-Thirds camera body under low-light conditions. Micro-Four-Thirds sensors don’t perform well under low-light conditions where the ISO needs to be cranked up to say, above 2000.

For these reasons, despite full-frame camera kits being expensive, bulky and heavy to carry around, they are still industry-standard and the preferred cameras for virtually all professional photography work.

Conclusion

Thus, while full-frame DSLR’s remaining the industry standard even today, we cannot ignore the undeniable advantages of the Micro-Four-Thirds cameras. Micro-Four-Third cameras, such as the Olympus EP-5 & the Panasonic GH5, are affordable and easy to carry around. Thus, enabling a much larger group of people (who are hobbyists and enthusiasts but not professionals) to have access to DSLR-like shooting conditions at a fraction of the price.

Ultimately, factors such as your budget, use and other criteria define whether you choose either Full-Frame, Crop-Sensor, or Micro-Four-Thirds cameras.

Read more info on sensors here.

The post Full Frame VS Crop Sensor VS Micro Four Thirds: Camera Sensors Explained appeared first on Digital Photography School. It was authored by Kunal Malhotra.


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Rumored 8K multi-aspect sensor could point to 4K super camera (Sony a7S III?)

28 Nov
There’s been a lot of speculation about what an a7S III would look like, perhaps this rumored sensor from Sony Semiconductor provides some clues.

We’ve been speculating for a while about what a Sony a7S III would need to offer to filmmakers to offer a compelling advantage over the a7R III and a7 III. Rumors of a new sensor from Sony Semiconductor could make even our wildest speculation look rather unambitious.

With the $ 2000 a7 III able to shoot 4K footage from a 6K region of its sensor (capturing more detail than the a7S II can), Sony would have to do something clever to make an a7S III look attractive. The office was split down the middle between ‘more resolution,’ perhaps using an a9-style stacked chip to give a7 III-esque resolution but perhaps at 60p and with minimal rolling shutter, or possibly a move to 10-bit recording, to give more flexible files, particularly for anyone shooting Log or HDR video.

In a recent interview, Sony’s Kenji Tanaka told us the a7S II successor would be “more than [a7S II users] expect.”

Rumored specification of sensor capable of 36MP stills and 8K Ultra HD capture
Pixel Size (µm) 4.88
Aspect ratios
  • 3:2
  • 16:9
Pixel Resolutions
  • 7380 x 4932 (3:2)
  • 7730 x 4352 (16:9)
Active sensor area
  • 36 x 24mm
  • 37.1 x 20.9mm*
Rumored readout rates
  • 10FPS @ 16-bit
  • 60FPS @ 10-bit**

*Although the 16:9 region is wider than the 3:2 area, its diagonal length is smaller, so would be guaranteed to fit within the standard image circle of full frame lenses.
**10-bit capture would limit the camera to around 10EV of dynamic range. Video is more likely to be made from 12 or 14-bit capture, the rates for which are unspecified.

However, Sony Alpha Rumors is reporting a fairly plausible chip spec that would blow such cameras out of the water: an oversized Full Frame sensor that could shoot 36MP stills or 8K video while maintaining the same diagonal field of view (so the scope of wide-angle lenses isn’t reduced by cropping a 16:9 image out of the middle of a 3:2 sensor).

This could give a camera that makes no apparent compromise between stills shooting and video capture.

It’s possible to use a 16:9 crop (yellow) that’s wider than the standard 36 x 24mm dimensions of a full frame sensor (pink), so long as the diagonal is the same. This maintains the same diagonal angle of view: a trick Panasonic and Canon have made use of in the past.

This sensor could form the basis of one hell of a stills/video camera. Details of the chip are hazy to the point where they could be downright inaccurate, but a camera that can shoot both high-res stills and high-res video would make sense as an a7S III, since it would cost more than an a7 III but offer a lot more to videographers than the a7R III can.

Don’t get side-tracked by talk of the a7S cameras being great for low light stills: it’s no better than the a7R III

And let’s not get side-tracked by talk of the a7S cameras being great for low light stills. I’d happily put money on that being a marketing angle decided as the camera was being launched: the a7S II is no better in low light than the a7R III if you scale files down to the same size. The only reason it ever looked good in low light was that it’s the first time we’d seen ‘Dual Gain’ technology appear in a Sony sensor, and didn’t initially recognize its significance.

Does 8K capture mean 8K output?

Just because a sensor can capture 8K doesn’t mean that it would necessarily output 8K footage. Every manufacturer we’ve spoken to has told us how difficult it is to process and compress 4K footage in a camera with a small, stills-style body with no fans, because too much heat builds up. It seems unlikely that Sony could go straight from 4K stills/video cameras that have some heat buildup limitations straight to one that can process and compress four times as much data.

And that’s before you question how many people have computers or software that can edit the footage.

Could we be looking at perfectly oversampled 4K output, rather than 8K

But the question is: would it have to? There’s very little call for 8K footage yet, given that 4K is only starting to find its way into people’s homes. Sony’s current cameras can downsample 6K capture into 4K output, so could we be looking at perfectly oversampled 4K output, rather than 8K? After all, the math is likely to be easier.

The Sony a7S used 3840 x 2160 capture to produce 1920 x 1080 video with no aliasing, since this 2x oversampling let it perfectly capture all the frequencies that can be included in 1080 footage.

There’s a precedent for this, of course. The original Sony a7S captured 3840 x 2160 pixels, not to create 4K footage but as the basis for excellent 1080 video. This has a number of advantages: 2160 is the fewest pixels you need to capture to accurately represent all the frequencies you can include in an image 1080 pixels tall (This article explains why). So the a7S captured 4K, filtered-out (blurred) everything that couldn’t be conveyed in a 1920 x 1080 video, and then downsampled to produce some of the best 1080 footage we’ve ever seen.

An ‘8K’ camera could output cleaner, more detailed 4K footage than anything we’ve yet seen

A camera sampling 8K could output cleaner, more detailed 4K footage than anything we’ve yet seen. Better still, creating one output pixel from four capture pixels means you’re capturing all three primary colors at every location, so you could potentially output a 4:4:4 color signal over HDMI if you wanted. Though it’s noticeable that the a7S didn’t do this with its oversampled 1080, and most consumer recorders will only cope with 4:2:2 signals.

Does 10-bit capture mean 10-bit output?

And, just as 8K capture shouldn’t be taken to mean 8K output, 60 frame-per-second readout shouldn’t be assumed to mean 60p recording. The specs of the chip are rumored and hence hazy but if it’s true that it can only shoot 60FPS with 10-bit readout, then I’d expect a camera that records 30p (or whatever rate the sensor can maintain in 12-bit mode). This is down to the difference between capture bit-depth (which is linear and can limit the system’s dynamic range), and output bit-depth (which can contain any amount of DR). 10-bit output is pretty flexible, but 10-bit capture (with a maximum of around 10 EV of DR) is pretty limiting. So I’d expect video to come from 12-bit capture and then, ideally, be recorded and output as 10-bit files.

Venice-series/anamorphic

Of course this could all be wrong. The rumors might be completely incorrect or the idea of an a7S III (or a9S if componentry or the desire not to overshadow the a7R III saw it sold at a higher price point) could be wide-of-the-mark.

Maybe this chip could be destined for something in Sony’s CineAlta range, with the 3:2 region used for anamorphic shooting. We doubt it, though.

For instance, the expensive, Stacked CMOS sensor used in the Sony a9 (or one very closely related to it) is almost certainly the one also used in Sony’s pro-video Venice camera that costs tens of thousands of dollars. This new chip could be for a sister model for that range, with the 3:2 aspect ratio used to capture footage with anamorphic lenses, for instance.

Or maybe it’ll be a different camera maker than ends up making use of the chip.

But, whether this 36MP still/8K video sensor turns up in a Sony a7/a9 series camera or not, it seems fair to say it could be the basis of one hell of a stills/video camera.

Articles: Digital Photography Review (dpreview.com)

 
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DPReview TV: Crop sensor, pro body cameras

04 Nov

Not everybody wants or needs a full frame sensor, but that doesn’t mean you have to give up pro-level performance on your camera. In this episode, Chris and Jordan compare four of the top performing APS-C and Micro Four Thirds models currently on the market: the Fujifilm X-T3, Nikon D500, Panasonic G9, and Olympus E-M1 Mark II.

Whether your priority is landscapes, portraits, sports and wildlife, or street photography, we’ll help you figure out which of these models is right for you. Want more information? Check out our in-depth reviews and sample galleries for each of these cameras.

Also, make sure to get new episodes of DPReview TV every week by subscribing to our YouTube channel!

Fujifilm X-T3 review

Nikon D500 review

Panasonic G9 review

Olympus E-M1 II review

Fujifilm X-T3 sample gallery

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Nikon D500 sample gallery

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Panasonic G9 sample gallery

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Olympus E-M1 II sample gallery

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Articles: Digital Photography Review (dpreview.com)

 
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