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[OM] Re: Apertures, where is f22 ?

Subject: [OM] Re: Apertures, where is f22 ?
From: Earl Dunbar <edunbar@xxxxxxxxxxxxxxxx>
Date: Tue, 07 Jun 2005 22:28:09 -0400
Hey Jon, do you want to run John in over the use of the apostrophe?

Earl

John A. Lind wrote:

>At 03:50 PM 6/7/2005, Moose wrote:
>
>  
>
>>The 50/3.5 has its best performance at f8-11 and declines below that.  F22 
>>is available, but shouldn't be used for critical work. If you look at all 
>>the 50mm tests, you will notice a distinct tendency for f16 ratings to be 
>>lower than wider apertures. The 135/4.5 macro offers apertures down to 
>>f45, but the performance slide starts at f22 and by f45 is really iffy, 
>>worse than the 50/3.5 at f22.
>>    
>>
>
>Both those lenses stop down that far because they're macro's.  I have just 
>  
>




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