Sigma has just started to ship the Quattro dp2, which departs from the original Foveon idea of having three vertically stacked pixels using the wavelength dependent absorption of light in silicon to, with a little point processing, end up with red, green, and blue pixels all captured from the same part of the image. The… [Read More]
A cure for Leica M240 green shadows
Last fall I discovered an issue with the Leica M240 that caused color casts in shadow areas of images that were aggressively pushed in post. Today, a reader posted an elegant solution to the problem: http://blog.perkins.org.uk/2014/07/fixing-leica-m240-green-shadows.html There is a possibility that Jonathan may make his tool available for download.
Big vs small pixels with the ISO 12233 target
Yesterday, I posted images of Bruce Lindbloom’s imaginary desk with simulated cameras of 10, 5, 2.5, and 1.25 micron pixel pitch, at ISOs of 100,800, and 3200, with and without a 4-way beam-splitting antialiasing filter with a null at 1.33 times the Nyquist frequency. Today I’ll post a similar 24-image suite with a lowered-contrast version… [Read More]
Big vs little pixels
With the announcement of the Sony alpha 7S and its 12 megapixel sensor, the debate about the relative merits of big-sensel sensors and little-sensel sensors has heated up again. The two poles of the argument: Capture the image at as high a resolution as you can manage. If you need a lower-resolution version, you can… [Read More]
Nikon D810 announced today
You probably already saw today’s announcement. Some useful improvements — the electronic first curtain shutter (EFCS) by itself is enough to make me a buyer, and maybe they’ve fixed live view — but in general underwhelming. Where is the 54 megapixel sensor? Where is the EVF? I may be cynical, but I asked myself a… [Read More]
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