Archived posting to the Leica Users Group, 2005/03/16

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Subject: [Leica] R lenses and variable apertures
From: daniel.ridings at edd.uio.no (Daniel Ridings)
Date: Wed Mar 16 14:06:34 2005
References: <BE5DA357.1FCC9%telyt@earthlink.net>

You said it yourself, Doug. It's silly because they are not unusable, 
contrary to your original statment.

If I were to follow your logic, all zooms are unusable (which I happen 
to think they are, unless they have a maximum aperture of at least 2.8. 
Anything slower is unusable, regardless of lack of light falloff or 
fallout).

Best,
Daniel

Doug Herr wrote:
> on 3/15/05 11:59 PM, Daniel Ridings at daniel.ridings@edd.uio.no wrote:
> 
> 
>>
>>Doug Herr wrote:
>>
>>>and
>>>unlike many of the competitors' zoom lenses the Leica zooms are fully 
>>>usable
>>>at maximum aperture.
>>
>>That was a silly remark, Doug. I guess Canon's lenses are unusuable at
>>maximum aperture, since I know that Nikkors are. Are there any other
>>competitors.
>>
> 
> 
> Daniel,
> 
> Many comparison tests have shown that C and N zooms, for example 80-200
> f/2.8 types, have significantly more light fall-off and flare at maximum
> aperture along with less-than-optimum image detail.  That's not the same as
> unusable, it means that their use is restricted at maximum aperture unless
> you are willing to accept these optical artifacts.  The same tests show far
> fewer optical artifacts in the Leica 70-180 APO.  Why is this silly?
> 
> Doug Herr
> Birdman of Sacramento
> http://www.wildlightphoto.com
> 
> 
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Replies: Reply from telyt at earthlink.net (Doug Herr) ([Leica] R lenses and variable apertures)
In reply to: Message from telyt at earthlink.net (Doug Herr) ([Leica] R lenses and variable apertures)