Archived posting to the Leica Users Group, 2003/08/26

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Subject: Re: [Leica] Re: Re: Leica 90mm f/4.0 Elmar C prices
From: Allen Graves <ahgraves@prodigy.net>
Date: Tue, 26 Aug 2003 21:28:55 -0500
References: <Law9-F114laYCKT7hFe0000a9d8@hotmail.com>

The 105 Micro-Nikkor has f32 but can suffer badly from diffraction, 
though it is generally a beautifully sharp lens.

Allen


>The Micro-NIKKOR-P 3.5/55mm, for one.  Can you explain the effect of 
>diffraction on a lens such as the 9cm Elmar?  Thanks.
>
>Richard
>
>>Many longer, slower Nikon lenses have f/32. The problem with f/32 
>>on the 90 is that while the depth of field may be large, 
>>diffraction at that aperture is severe enough to make everything 
>>medium fuzzy. Not an effect one aims for with Leica glass.
>>
>
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In reply to: Message from "Richard Coutant" <rhc3vt@hotmail.com> (Re: [Leica] Re: Re: Leica 90mm f/4.0 Elmar C prices)