In a message dated 00-01-25 11:22:43 EST, you write:
> I just purchased the Tamron 90 mm SP macro and need an adapter for it.
> What is the advantage of the Adaptall2? Do both adapters work or does
> one have more functions?
>
> Thanks in advance,
>
I have one of the older Adaptalls and one of the first Tamron zooms, a huge
and heavy 38-100 (a transition lens between Pentax screw thread and Olympus
for me). This Tamron has the manual/auto diaphragm switch on the lens itself
so the mount adapter does not have a aperture stop down button. The later
Tarmron lens and mounts moved the stop down function to the lens adapter. I
think the later adapter (Adaptall 2) will work with all Tamron adaptalls (but
not adaptamatic, which was an earlier system). I also think that all SP
Tamrons do not have a manual/auto button on the lens so you have to use the
Adaptall 2 mounts.
Warren
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