Re: [OM] another one with the 12-200

[Mike Gordon via olympus]

<<<<<MikeG may weigh in on the issue of sensor stack thickness. It's a real 
consideration for old MF lenses.



Sensor 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. It is 
clear even some WA SLR lenses can be effected at FL <35mm.    Other lenses seem 
fine. 
If one obtains the exactly correct PCX filter, it can correct the corner 
smearing and maintain infinity focus. 

Another way is to 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.  I do not know 
the sensor stack thickness on the new FF Panny.

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/

Curiously the  proper Speedbooster will correct for the sensor stack, but that 
is not a solution for FF.

Adaptable, Mike
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