Lens mount adapter specialist Metabones has launched a new series of Speed Booster lens adapters especially designed for the Blackmagic Design Pocket Cinema Camera 4K (BMPCC4K). The new adapters allow users to mount Nikon G, Canon EF, Canon EF Cine and Arri PL lenses onto the Micro Four Thirds camera.
The company says it has redesigned the adapters to take account of the filter stack construction that Blackmagic uses on the sensor of this camera to ensure users get the same performance as other MFT users. Blackmagic uses a thinner layer of filters over the sensor of the BMPCC4K, compared to other MFT cameras, that can alter the effectiveness of the standard MFT adapter at wide apertures, the company claims. This means the new models aren’t compatible with other Micro Four Thirds cameras.
The adapters come in Ultra 0.71x and XL 0.64x versions, which reduce the crop factor in 4096 x 2160 4K video to 1.35x and 1.22x respectively. The Arri PL version will only be available as an Ultra 0.71x, but the other mounts can accept either adapter, with the company claiming that many EF-S and DX lenses from Canon and Nikon can also be used.
The Metabones Ultra 0.71x and XL 0.64x adapters are available now. For more information see the Metabones website.
Metabones Introduces a New Series of Speed Booster® for BMPCC 4K Camera
Caldwell Photographic Inc. and Metabones are pleased to announce a new series of Speed Booster for Blackmagic Design Pocket Cinema Camera 4K (BMPCC4K).
The BMPCC4K Speed Booster ULTRA 0.71x and XL 0.64x are similar to the standard m43 Speed Booster adapters, but the optics have been re-designed to optimize for the filter stack thickness of the Blackmagic cameras, which is substantially thinner than that of standard m43 cameras.
The thickness of the camera’s filter stack is an important component of the overall optical design, and the re-designed optics ensure that both versions can achieve the same high performance as the Speed Booster versions for standard m43. This is especially critical at the extremely large apertures made possible by Speed Booster technology.
In addition to the new optical designs, the new series of Speed Boosters also features a longer tripod mount to perfectly match the height of the BMPCC4K camera body. This way the camera and the Speed Booster can be mounted firmly on the same quick release plate.
Both versions – the Speed Booster ULTRA 0.71x and XL 0.64x – are available with Nikon G lens mount, with Canon EF lens mount and with Canon EF CINE lens mount. The ARRI PL lens mount is available in ULTRA 0.71x version only. The Canon EF CINE lens mount creates a positive lock for a secure electronic connection, and together with the matching length of new the tripod mount, allows for a rock-solid mechanical setup, which is important when using follow focus attachments.
This new series of Metabones Speed Booster adapters is designed exclusively for Blackmagic Design Pocket Cinema Camera 4K (BMPCC4K). They cannot be attached to any other m43 cameras such as JVC, Olympus or Panasonic cameras.
Metabones Speed Booster ULTRA 0.71x for BMPCC4K:
The new Speed Booster ULTRA 0.71x for BMPCC4K uses an advanced 6-element 4-group optical design incorporating ultra-high index tantalum-based optical glass. The new design is specifically optimized to bring the same level of astonishing performance as the ULTRA Speed Boosters for Micro Four Thirds to users of the Blackmagic Pocket Cinema Camera 4K.
In particular, the Speed Booster ULTRA 0.71x is optimized to correctly account for the BMPCC4K camera’s specific filter stack located near the sensor surface. This is especially critical at the extremely large apertures made possible by Speed Booster technology. As a result of this careful optimization, an enormous range of full-frame optics, ranging from vintage film lenses to the latest digital designs, will function flawlessly when adapted to BMPCC4K bodies.
The Speed Booster ULTRA 0.71x reduces the crop factor of the BMPCC4K camera as shown in the above table. The new design for BMPCC4K makes very effective use of exotic materials at the furthest limit of glassmaking technology, and as a result is almost perfectly corrected for use with all full-frame SLR lenses regardless of aperture or exit pupil distance. The Speed Booster ULTRA 0.71x will also work extremely well with many DX and APS-C format lenses, provided the image circle provided by the lens is large enough.
Optical performance of the new Speed Boosters is so good that the MTF of any lens attached to it will be improved. Even the latest generation of ultra-high performance SLR lenses such as the Zeiss Otus series can be improved by adding a Speed Booster ULTRA 0.71x.
MTF at 10, 20, and 40 lp/mm as a function of image height for output apertures of f/0.9, f/1.0, and f/2.0, respectively1. At the maximum aperture of f/0.90 (i.e., with an f/1.2 master lens) the sharpness and contrast are extraordinary across the entire image circle. At just one-third stop down to f/1.0 the performance is equal to or better than the best photographic lenses used at their optimum apertures. An additional stop down to f/2.0 yields performance that is rarely encountered in photographic optics. In practice, what all of this means is that the new Speed Boosters will always enhance and never degrade the performance of the attached master lens.
And other aspects of optical performance haven’t been sacrificed in order to obtain high MTF, either. There is less than 1 stop of corner illumination falloff even wide-open at f/0.9. There is no vignetting at all after the output aperture reaches f/2.82. Rectilinear distortion added by the Speed Booster ULTRA is negligible at less than 0.7%.
Metabones Speed Booster XL 0.64x for BMPCC4K:
Also this Speed Booster XL 0.64x adapter has been designed exclusively for the Blackmagic Pocket Cinema Camera 4K, with a magnification of 0.64x. The Speed Booster XL 0.64x uses an advanced 7-element optical design to achieve extraordinary optical performance at apertures up to an incredible f/0.80.
The new Speed Booster XL 0.64x reduces the full-frame crop factor of the BMPCC4K as shown in the table further above. In addition, the speed of any attached lens is increased by 11/3 stops, with a maximum output aperture of f/0.80 when an f/1.2 lens is used. For example, a 50mm f/1.2 becomes a 32mm f/0.80, which is the fastest aperture available for Blackmagic cameras.
Perhaps most exciting of all, in addition to increasing lens speed and field of view, the Speed Booster XL 0.64x offers amazingly high image quality even at extremely large apertures. Figures 1 through 3 below show MTF at 10, 20, and 40 lp/mm as a function of image height for output apertures of f/0.8, f/1.1, and f/1.81. At f/0.80 (i.e., with an f/1.2 master lens) the sharpness and contrast are extraordinary out to an image height of 5.1 mm, which is the limiting image height of the BMPCC4K camera’s FHD video mode. Beyond 5.1 mm the performance drops gracefully, but remains very good even in the extreme corner of the full Blackmagic sensor. Note that as the master lens aperture is reduced to f/1.8 and then f/2.8 (corresponding to output apertures of f/1.1 and f/1.8, respectively) the performance improves everywhere, especially in the extreme corners.
And other aspects of optical performance haven’t been sacrificed in order to obtain high MTF, either. There is only about 1 stop of corner illumination falloff even at f/0.8. There is no vignetting at all after the output aperture reaches f/3.42. Rectilinear distortion added by the Speed Booster XL 0.64x is negligible at less than 0.8%.
Just like the Metabones Speed Booster ULTRA 0.71x for BMPCC4K, the Speed Booster XL 0.64x is optimized to correctly account for the BMPCC4K camera’s specific filter stack located near the sensor surface. This is especially critical at the extremely large apertures made possible by Speed Booster technology. As a result of this careful optimization, an enormous range of full-frame optics, ranging from vintage film lenses to the latest digital designs, will function flawlessly when adapted to BMPCC4K bodies. In fact, most lenses will have significantly improved MTF when used with the Speed Booster, compared to using them with a plain (i.e. “glassless”) adapter on Blackmagic cameras.
