#1. "RE: LENS?" | In response to Reply # 0benveniste Nikonian since 25th Nov 2002Tue 08-Jan-13 09:45 PM
You can use DX lenses, but these lenses are designed to project an image circle sufficient only for the smaller DX sensor. When used on a film camera like the F100, this will often result in the corners and edges of the film receiving little or no light at all.
You can't use IX-Nikkor lenses at all with the F100; they intrude too far into the camera body.
"There is no real magic in photography, just the sloppy intersection of physics and art." — Kirk Tuck
#2. "RE: LENS?" | In response to Reply # 1RABaker Registered since 30th Sep 2003Wed 23-Jan-13 07:36 PM
Michael (benveniste) is exactly correct. Just for a test when I received my D200 and 17-55 DX lens I tried the lens on the F100 I had at the time. At 17mm there was severe vignetting in the corners. As I zoomed the lens toward 55mm the vignetting became less, and somewhere around 35mm it seemed to disappear. So the lens could work as a 35-55mm zoom with little or no vignetting. Different lenses will behave differently - it is possible that some will vignette at all focal lengths.
#3. "RE: LENS?" | In response to Reply # 0
Because you lose a significant part of the frame. Here's an example:
Precisely how much of the corners you lose depends on which lens, and in the case of zoom lenses, the focal length setting. There are some lenses that cover the entire frame at some focal lengths - the 17-55/f2.8 noted above is one of them. But before assuming that such a thing is OK, remember that nobody designed these DX lenses to have high quality in the corners of frames that they weren't even supposed to cover. Everyone seems to be all hung up on sharpness, even into the corners, yet when this particular topic comes up, many folks seem to just stop at the point of looking at whether or not the vignetting is awful or not. (Hint: on the couple of DX-on-full-frame lenses I've looked at, the corner quality is NOT what most people want.)
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