At 1:59 AM -0400 4/22/02, [EMAIL PROTECTED] wrote: >On an EOS 3 would a T Mount lens cause exposure difficulties? Since I would >shoot almost always at f2.8, I won't worry much about stop down metering. >Also, what does a T mount lens do on a D30 or D60?
The only EOS camera which has significant problems with metering most manual (non EF) lenses is, to the best of my knowledge*, the EOS Elan 7/30/33/3. The D30 works fine. I haven't heard about the D60, but every review I've read has indicated that its metering is just a lightly modified version of the D30's, so presumably it'll work also. * Of course, it's entirely possible that some manual lenses (say, long telephotos or super wide angles) might cause problems with metering as well, but these are individual special cases. The only way to find out is to do some empirical testing. http://www.teladesign.com/photo/manual-lenses.html Your setup sounds unusual, though. What does "a modified Canon 400mm FD 2.8 that has been set up to shoot with a (EOS) T-mount" mean? Do you mean you have an FD mount lens which has an FD lens mount to T-mount body adapter which you intend to attach to an EOS camera using a T-mount lens to EOS body adapter? (ie: two metal ring adapters) Or do you mean you have an FD mount lens which you intend to attach to an EOS camera using an FD mount lens to EOS body adapter? (ie: one metal ring adapter) "T mount" is not a generic term for a manual mount lens, but is a specific type of screwmount lens mount system, 42mm in diameter with a .75mm thread pitch. If you mean the former I have to say that's quite a bizarre setup - let us know if it works. If it's the latter you know that because of lens register problems there are two types of FD lens to EOS body adapters, yes? One type is a metal ring with no optics but which does not permit the adapted lens to achieve infinity focus. The other type is a metal ring with glass optics which permits the adapted lens to achieve infinity focus, but which both costs some optical quality and acts as a teleconverter, extending the focal reach of the lens. This latter converter is said to require metering compensation with some camera bodies and lenses. - Neil K. -- t e l a computer consulting + design * Vancouver, BC, Canada web: http://teladesign.com/ * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
