>From my memory there are only 3 contacts on the Tamron mount, but still that may be fine. I think all Tamron lenses have a minimum aperture of f/32, so that saved communicating a few bits of information via the PKA contacts, I guess.
My Tamron 180/2.5 was reported as f/2.8 on my PZ-1p, although I have never worried about that 1/3 stop difference. f/2.5 is one of their favorite maximum apertures (24mm, 90mm, etc.) -- Bo-Ming Tong ----- Original Message ----- From: Joe Wilensky <[EMAIL PROTECTED]> Date: Thursday, October 2, 2003 6:16 am Subject: Re: *istD and Tamron Adaptall2 lenses? > I've used my Tamron 90mm f/2.5 SP macro on the PZ-1 and PZ-1p, and > it > correctly reports itself as an f/2.5 lens to the camera. Doesn't > the > adaptall mount have the ability to transmit a few different > maximum > aperture codings to the camera depending on the Tamron lens that's > mounted?
