<<<Is this what you mean by "Stack"
The glass in front of the sensor--UV filters etc. WA RF lenses with short
exit pupil distances at wide apertures are very degraded in corners. One can
get the Sonnie cam modified by Kolari if committed to use such lenses but have
to be prepared for more complex work flow with color issues. Roger had 3 good
articles on sensor stack effects:
https://wordpress.lensrentals.com/blog/2014/06/the-glass-in-the-path-sensor-stacks-and-adapted-lenses/
https://wordpress.lensrentals.com/blog/2014/06/sensor-stack-thickness-when-does-it-matter/
https://www.lensrentals.com/blog/2014/07/sensor-stack-thickness-part-iii-the-summary/
BTW the zony 55/1.8 is quite nice and I rented it as a trial for Bhutan. More
CA than expected for the price. I did have the OMZ 50/1.4 with me too.
Here is one shot with the 55 at f8:
https://www.olyendomike.com/Bhutan-Bangkok-2017/i-jbVxpm6/A
Watch the stack, Mike
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