Matt,
I use a Center Filter 3 with my 58mm Super Angulon XL. My understanding is the 3 and 3c are very similar, but I know Schneider would say otherwise. I have not noticed any major fall off when using negative film, I primarily used Kodak Ektar, FP4 and HP5.
When I got the filter a few years ago I did a test with some FP100c with and without the filter using camera movements to to show the edge of the image circle. The left photo is without the filter (I only have a bad iphone photo right now, but if you like I can upload a scanned one when I get back home this weekend).
Attachment 195202
You can see without the filter there is a large drop off, and it is reduced with the CF 3, but not completely. The horizon on the photo is straight through the center of the lens, with front rise to show the edge of the image circle while the lens is stopped down.
Also, here are links to a photos that shows the full frame with negative film:
http://https://www.nathanlambrecht.com/index/G0000qa.6.8Lcjz8/I0000o99uQXkougA There is a grad filter over the sky in this photo.
http://www.nathanlambrecht.com/index...000w1BBhXJGNCE
I hope this helps.
-Nathan
Bookmarks