cffres@uvaee.UUCP (Chuck Ferrara) (09/20/85)
I have had some trouble with vignetting when I tried to use a thin polarizer (specifically designed for wide angles) at the 28 mm. focal length setting. I was wondering if anyone else has had similar difficulties with filters. The problem doesn't seem to occur with the UV filter, which is roughly the same thickness. Could this be related to the fact that the light from the corners of the image has to pass through more glass than light from the center? I also noticed that this vignetting is not always symmetrical.