rscheffler wrote:
The M240 was designed with shallower wells, but I don't believe it's an actual BSI sensor. For example see here where it's stated the conducting elements above the photodiodes were made of thinner copper to bring the microlenses closer to the photodiodes. In a BSI sensor the conducting elements are behind the photodiodes. I know I still get color shift with specific, more problematic lenses on the M240, but it's better than it was with the M9. The Z6's sensor is BSI from what I've read, which would give it an advantage regarding color shift.
Another factor for color shift is likely the IR blocking filter over the sensor. With wider short exit pupil distance lens designs with light reaching the sensor at more oblique angles, those off-axis light rays travel farther through the IR filter, resulting in a stronger filtering effect, which in turn results in uneven color across the image.
Hi Ron,
I know that with the Sony A7rII and A7rIII cameras, these cameras had much less problem with color issues with many of the M mount wide angle lenses like my Zeiss 35mm f1.4 Distagon ZM than my original A7r cameras. Even after Kolari Vision performed a thin sensor modification on my one A7r V3 modified camera I would need to use corner fix with that lens and my Leica M 24mm f3.8 Asph lens. I stopped using those lenses with that camera and these lenses no longer cause a color issue with my Kolari Vision UT sensor modified A7rII. Many of us who had not had a thin/UT sensor modification with an A7rII or A7rIII were able to get by with the Zeiss 35mm f1.4 ZM for color(need new color calibration however) though the lens would need much more stopping down on the stock camera bodies to perform acceptably.
Rich
Aug 07, 2021 at 06:05 PM
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