I did a little test on the 907x-CFV100C. As far as I can tell, the camera's lens mount on the 907x and X2D are identical - i.e., as
@Ai_Print showed, the circular opening just behind the lens mount just clips the corners of the sensor. Obviously no issue with native lenses but apparently causing some clipping/vignetting at least with the 350 Tele-SA + APO 1.4XE. Here's what I found:
- 350 Tele-SA @ f/5.6: corner clipping/vignette
- 350 Tele-SA @ f/8: some residual corner clipping/vignette
- 350 Tele-SA @ f/11: no clipping/vignette
- 350 Tele-SA + APO 1.4XE @ f/5.6-f/22: corner clipping/vignette, decreasing and minimal by f/22 (but who would shoot this fabulous lens at f/22)
And for reference:
- 250 Superachromat @ f/11: no vignette
So, it seems that the issue with the 350 can be minimized/eliminated by stopping down, but not entirely when using the APO 1.4XE tele-extender. In any case, the amount of vignetting is minimal even in the worst case, easily handled by a quick spot healing toolbrush if one wants to use the entire frame.
John
P.S. Thinking myself to be clever, I used the 907x's handy tool for entering lens metadata to keep track of what I was doing. However, upon importing the files to my computer, none of the lens metadata appears either in Phocus or Adobe Bridge. Does anyone here know the trick to reveal the lens metadata?
EDIT: nevermind - I just updated Phocus from 3.7.6 to 3.8.1 (the latter updated to handle files from the 907x-CFV100C - doh!) and the manually entered lens metadata are visible when images are imported with the updated software. It seems a bit buggy, however... For example, the software defaults to CF 250 for images labeled as shot with the CF 250 SA, so always good to check what's listed before accepting default lens corrections. Also, focus settings don't appear to transfer to the lens corrections tab...
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