Thanks - yes, f2.5 version. Damn. Now I have to go check my bank account!
AndrewF
>The difference was between the 90mm f/2.5 version, and the f/2.8 version.
>Since you mention the 1:1 extender, it is probably the F/2.5 version.
>
>f2.5 = great
>f/2.8= not as good
>
>Larry
>
>
>andrew fildes wrote:
>
>> Just been offered a Tamron SP 90mm Macro with 1:1 extender. It's the 55mm
>> filter ring version. I remember a discussion on the relative merits of the
>> 55mm and the older(?) 49mm version - was the difference in the build
>> quality only or was there a difference in performance too?
>> AndrewF
>>
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