When you use a fast lens wide open on your DSLR and you set the ISO to a desired speed, is your camera giving you what you ask for? Or, is the camera increasing the ISO without reporting what it’s doing?
Indeed – does it even make sense to use fast lenses on a CMOS sensor DSLR when you could get better quality, along with smaller size and lower weight with a slower lens to start with?
The Luminous Landscape‘s Mark Dubovoy, using data kindly provided by DxO Labs, has been investigating this issue and today publishes An Open Letter to Major Camera Makers.
Publication of my First Impressions report on the Panasonic GH2 and two new lenses has been delayed until Friday.
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The Luminous Landscape – What’s New