On 10/28/2010 11:16 AM, Jeffrey Thorns wrote:The issue here for DSLRs happens both because of the sensitivity to the angle of incidence of the light AND the fact that SLR lenses generally are not designed with a huge circle of coverage. They don't have to - nothing moves on these cameras as compared to, say, a view camera. One could probably avoid this problem to a large degree by using lenses that cover a full sized sensor on a half-frame camera or even older, manual focus lenses designed for 35mm film on a newer digibody. The problem there is that Nikon seems to be the only vendor that has preserved their lens mounts, and even then, an old AI or AI-S lens does not meter properly on anything but their highest end digital cameras. In short, digital makes this a big pain...Nikon's mid-range also accepts older lenses. I have a 300 that I have put a couple of AiS lenses on.Yes, the mounts work, but it was my understanding that you cannot meter through them ...
In order for the metering to work, you have to build a 'profile' of that lens within the DSLR. The profile IIRC involves entering the minimum and maximum apertures, then naming the profile. Whenever you want to shoot with that lens, you have to select that profile first. I also seem to recall that the only metering that will work is aperture-priority.
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