Peter Blaise Monahon , Dec 07, 2006; 04:11 p.m.
A T-mount-adapter was the first invented and released by Tamron (hence the "T" in the description) in the late 1950's as a way to make lenses interchangeable between different 35mm film single lens reflex (SLR) cameras. Tamron never "patented" it so it's NOT restricted, and ALL T-mounts are the same EXCEPT for the camera-body-end - each matches one and only one camera body style. The lens end is identical for ALL T-mounts so ALL T-mount lenses fit the front of the T-mount-adapter, then the rear of each T-mount-adapter fits whatever camera body it's made for.
You're right in getting a T-mount-adapter for the Minolta / Konica Minolta / Sony Alpha / Dynax / Maxxum AF A-mount / Alpha-mount camera body - they are ALL the same (since 1985!). ANY make will do, none are name brand anymore, and all have house-names like "Bower" or "Cambridge" or "Adorama" or whatever - store-name repackaging of UFO original stuff - NOTHING SPECIAL. T-mounts are the OLDEST interchangeable lens design for SLRs, thank you Tamron!
Try http://www.srbfilm.co.uk/ or equivalent supplier, expect ~$15-20US or equivalent (200% markup from cost?!?). Google search for [t mount minolta af] at
... brings many local resources - ALL GOOD and ALL EQUAL. For example:
Your microscope may need a T-mount OR a C-mount or whatever the maker designed it for - what do they say? C-mounts can be found at places like Edmunt Optics
Compact C-to-T Adapter (link) This component adds 12.57mm to system length. Choose either a female T-Thread to male C-Thread (#53-483), or male T-Thread to female C-Thread (#58-753)....
Standard C-to-T Adapter (link) Adapter has a female T-thread at one end and male C-thread on the other. Component is 41.8mm long, including 4mm long male C-thread and adds 37.8mm to system length. Set screws to adjust orientation....
Let us know what you do and how it works out. Very exciting photography they have planned!
Click! Peter Blaise, Minolta Rokkor Alpha DiMage Photographer