The EOS-3 has it as well. Reasons why it's nice:
1) Pinhole cameras using small holes drilled in the body cap (F=64~)
2) Stop-down metering with T-mount lenses
3) Setting F8 on your 50mm prime and then switching to your 24-70mm
doesn't change the F-stop
4) You can set the F-stop before even putting on your lens, great
if you have two bodies (one with slide; one with print film).
Karen
At 10:11 AM -0500 2/14/01, Elliott, Rolland wrote:
>I don't understand the function of Custom Function 5 on the EOS 1v. Would
>someone enlighten me? It supposedly allows one to set the aperture on the
>camera body even though the lens is physically detached from the body. Is
>this for close-up work? Maybe one has to set the effective aperture to allow
>correct metering?
>
>My main interest in using this custom function is with old Nikon lenses & an
>EOS mount adapter. Perhaps I could dial in the effective aperture into the
>EOS1v even though the Nikon lens isn't providing any aperture info to the
>body via electronics contacts.
>
>I'm seriously looking at buying this camera, and found the custom function
>intriguing.
>Peace, Rolland
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