The lens has about a half-stop of fall-off from center to edge when  
wide open, which cleans up to virtually zero a stop or so closed  
down. I think the MTF program line holds it at f/4.5-5.6 most of the  
time in decent light, about what you'd expect for a 21mm f/3.2 lens.

These are not "test photos" so my usual photo processing was  
applied ... I usually add a little touch of vignetting, so it is  
accentuated.

Godfrey


On Sep 28, 2007, at 9:01 PM, David Savage wrote:

> I was thinking last night that this would have been a useful FL for
> some of the scenes I came across.
>
> Is it just my imagination or is there noticeable light fall of in the
> corners? I'm not trying to find fault, I sometimes add vignetting, but
> I just want to make sure I'm not seeing things.
>
> Thanks for posting it.
>
>>    http://homepage.mac.com/godders/DA21WO/


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