Hi C. H. and all
CH wrote
> There is another Tamron "2X SP" for Fix system that fit OM lenses,
> it is not flat field, the field curvature is quite high but it is very
> sharp. I once own the Vivitar 2x Macro, it is very good. I have not make
> a direct comparison but I feel the Tamron is sharper. But as other
> mentioned the macro function is very useful especially with normal lens.
> Below is a sample taken with 75-150 at 150mm+Tamron 2X SP Fix,
> film Kodak Supra 400.
>
> http://www.accura.com.hk/75150-2x.jpg (235K)
Many thanks, I see what you mean. John Shaw makes similar comments
about teleconverters. On the other hand there was that shot by ? was it
Stephen Scharf, noted the other day of a motor-bike taken with a Zuiko 200
and Tamron 2x teleconverter.
Difficult to compare - the water buffalo have textures in their coat that don't
have an equivalent in the motor-bike.
I'll probably come back for advice about specific Tamron teleconverters at
some future time.
Brian
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