----- Original Message ----- From: "David Zaninovic" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, May 10, 2005 9:56 AM Subject: reverse mounting lenses
> Is F50/1.7 front element large enough to be reverse mounted on top of Tamron SP90/2.8 ? SMC-M 28/2.8 works only when Tamron is set > to f2.8, beyond that I get vignetting. Which lens is recommended for reverse mounting ? It all depends on thread size. Just use step-up/step-down rings to make them mate. if you get vignetting, you need to add extension tubes between the camera body and the prime lens. this will eliminate it. > > I see that it helps if I focus the Tamron as close as possible but not by much. Is it good or bad the fact that Tamron has deeply > recessed front element ? You should always focus as close as possible. Again, extension tubes are a big help. It shouldn't matter that the tamron has a recessed front element. Check out John Shaw's "Closeups in Nature" A great book with all kinds of techniques for macro. Christian
