Archived posting to the Leica Users Group, 2008/02/03

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Subject: [Leica] Is the TE a zoom?
From: hlritter at bex.net (Howard Ritter)
Date: Sun Feb 3 18:54:40 2008
References: <C3CBB351.14D6A%lug@steveunsworth.co.uk> <p06230920c3cbd0be612a@[10.1.16.134]>

I'd forgotten that, but I'm not sure that means anything by itself,  
since the lens diagram for the original TE (in my original post I was  
mistakenly referring to the diagram for the WATE) appears to show that  
the change in FL is produced by moving the front element group alone,  
and that it occupies the extreme positions at the extremes of focal  
length. If the change in FL is a direct function of the displacement  
of the zooming element, then there is no reason why the seemingly odd  
choice of mechanical FL selection excludes the possibility of a zoom.  
I vaguely recall having read why this design was chosen but I can't  
remember the reasoning. If this is correct, then there should  
therefore be a functional (but unmarked) 35mm position between the 28  
and the 50. WIsh I had one to diddle with!

--howard


On Feb 3, 2008, at 3:13 PM, Henning Wulff wrote:

> At 6:07 PM +0000 2/3/08, Steve Unsworth wrote:
> It's even easy to tell the TE can't be a zoom because the order of  
> focal lengths is: 28-50-35. Can't have a zoom with that arrangement.
>
> -- 
>   *            Henning J. Wulff
>  /|\      Wulff Photography & Design

Replies: Reply from henningw at archiphoto.com (Henning Wulff) ([Leica] Is the TE a zoom?)
In reply to: Message from lug at steveunsworth.co.uk (Steve Unsworth) ([Leica] Is the TE a zoom?)
Message from henningw at archiphoto.com (Henning Wulff) ([Leica] Is the TE a zoom?)