Archived posting to the Leica Users Group, 2005/01/10

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Subject: [Leica] Zeiss Ikon Focus Shift
From: Frank.Dernie at btinternet.com (Frank Dernie)
Date: Mon Jan 10 13:26:11 2005
References: <OFCE3B0BED.15451E8D-ON85256F85.00733B97-85256F85.007352BB@manulifeusa.com>

It is, as is the case with other floating element systems from Leica  
and others, compensating for the aberrations changing with focus  
distance.

On 10 Jan, 2005, at 20:59, bparsons@jhancock.com wrote:

>
>
>
> If I am correct, there is a floating element in the rear portion of  
> the new
> 50mm asph lens. ?If this is so, what function is it performing?
>
>
> |+------------------------------ 
> +-----------------------------------------|
> ||   "B. D. Colen"              |                                       
>    |
> ||   <bdcolen@earthlink.net>    |   ? ? ? ? To: ? ? ? ?"'Leica Users    
>    |
> ||   Sent by:                   |   Group'" <lug@leica-users.org>       
>    |
> ||   lug-bounces+bparsons=jhanco|   ? ? ? ? cc:                         
>    |
> ||   ck.com@leica-users.org     |   ? ? ? ? Subject: ? ? ? ?RE:  
> [Leica]   |
> ||                              |   Zeiss Ikon Focus Shift              
>    |
> ||   01/10/2005 03:16 PM        |                                       
>    |
> ||   Please respond to "Leica   |                                       
>    |
> ||   Users Group"               |                                       
>    |
> |+------------------------------ 
> +-----------------------------------------|
>
>
>
>
>
>
> Bill Maxwell provided us with extensive information about Nikon's
> floating element lens design, and Zeiss's apparently using something
> similar, and then wrote...
>
> "Funny thing is that no one called it "hype" when Nikon introduced the
> CRC
> system. What is the resistance to this new Zeiss product line that
> prompts
> such comments?"
>
> Bill, Bill, Bill, are you serious, or is your tongue grafted to your
> cheek? Surely you understand that most resident's of LUGland do not
> consider Nikon to be competitive with Leica, while the new Zeiss line
> most assuredly is. Therefore, if Nikon does it it's "interesting;" if
> Zeiss does it it's marketing horseshit. Rest assured, if Leica did it,
> it would be described as one of the great Leica innovations - even if
> Nikon has been doing it for a decade or so. ;-)
>
> B. D.
>
>
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>
>
>
>
> _______________________________________________
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In reply to: Message from bparsons at jhancock.com (bparsons@jhancock.com) ([Leica] Zeiss Ikon Focus Shift)