I didn't see a thread for the adaptall mount lenses (Tamron thread is not really appropriate, as the adaptall lenses are unique), so decided to start one. Any lens in the following website qualifies:
Adaptall-2.com
The website has information for those who do not know much about these lenses.
If this club is already here, then please let me know.
I've only used the 300/f2.8 for a few hours of real shooting. Since then I have sold it to a fellow forum member. Some of the shots are with the Pentax 1.7 AFA, which makes this lens to be a 510mm/f4.8 auto focus lens. The Adapter works well with this lens.
Some images:
P.S: The first image actually got in to the PPG...woohooo
Now, the lens with the Sigma 100-300 F4 and the Pentax DA21
Please share your images......