> Can any Olympians on the list help with information on the Tamron 90mm 2.5
> macro adaptall 2 lens (early version with 49mm filter thread) I want to
use
> it at 1:1.
I have this lens. I use it as much as all my other lenses put together.
> 1/Does the 2x flat field converter use a lens in its construction?
Yes
> 2/Would I get just as good a result with a 45mm extension tube?
Probably better.
> 3/Am I correct in assuming 45mm extension added to the 45mm rack of the
> lens will give me 1:1?
Yes. I put my 25mm tube on the 90mm often. And nowadays also screw in a IS
series diopter sometimes too.
> 4/What about using a Vivitar 2x converter to get 1:1?
What about the quality with more glass in the light path?
Foxy
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