Archived posting to the Leica Users Group, 2012/11/29

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Subject: [Leica] Leitaxed R lenses on Nikon
From: wildlightphoto at earthlink.net (wildlightphoto at earthlink.net)
Date: Thu, 29 Nov 2012 10:31:12 -0500

Frank Filippone wrote:

>>>
I think it is called manufacturing tolerances and in use wearing in of those
tolerances.  Look at it this way, if your market wants a $600 ( price point
marketing) lens, then you design to that spec... $600.  Tolerances are
designed to be more loose than the same lens specs with a price of $1600.
Maybe you use metal with the expensive lens, and plastic with the cheaper.
Same with bodies. 

Now the user expects the results of those 2 lenses to be thee same. So you
design into the bodies the ability to tweak tolerances out, so that the
results are improved.  Time goes on and something inside the lens wears,
changes, or otherwise moves, and you start getting worse results.  Back to
calibration SW to fix it.

It makes a lot of sense to me.
<<<

Closed-loop focussing algorithms would go a long way toward fixing the
errors.

Doug Herr
Birdman of Sacramento
http://www.wildlightphoto.com

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Replies: Reply from red735i at verizon.net (Frank Filippone) ([Leica] Leitaxed R lenses on Nikon)