| Johnny Johnson wrote:
> At 03:39 PM 10/8/2008, usher99@xxxxxxx wrote:
>
>   
>> Found it remarkable that the review says the performance is diffraction 
>> limited at f/5.6
>> at 35mm.  Can't say I've seen that stated for any FF lens at that FL.
>>     
>
> The Zeiss Contax lenses that so many people rave about also peak at f4 to 
> f5.6 - at least up through the 135/2.
>   
I was also wondering about that statement in the review. I suspect a 
statement that performance started to fall off after f5.6 would be more 
appropriate - and accurate.
The Tamron 90/2.8 in Pop Photo's test had an optimum aperture for macro 
of  - wait for it - f2.8, although performance was great down to f22. My 
test of the later, Di version showed the same thing.
Moose
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