Archived posting to the
Leica Users Group, 2010/04/24
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Subject: [Leica] New Summilux-M 35/1.4 ASPH. #11663
From: benedenia at gmail.com (Marty Deveney)
Date: Sun, 25 Apr 2010 08:22:20 +0930
References: <C7F54BCE.68783%joseph@yao.com> <034b01cae1db$4485fe80$cd91fb80$@net> <034c01cae1dc$db82d640$928882c0$@net> <k2l36172e5a1004220517xaf8527adp7b363958729f96f1@mail.gmail.com>
> You know that the Aspheric elements don't 'float' and they are ?not related
> to 'back focus' right? The floating elements do improve close in
> performance
> and I think minimise focus shift as you stop down, I 'd stand correction on
> that last.
Using aspherical elements in lens design helps control spherical
aberrations, and so help minimise focus shift.
Marty
In reply to:
Message from joseph at yao.com (Joseph Yao) ([Leica] New Summilux-M 35/1.4 ASPH. #11663)
Message from red735i at earthlink.net (Frank Filippone) ([Leica] New Summilux-M 35/1.4 ASPH. #11663)
Message from red735i at earthlink.net (Frank Filippone) ([Leica] New Summilux-M 35/1.4 ASPH. #11663)
Message from hopsternew at gmail.com (Geoff Hopkinson) ([Leica] New Summilux-M 35/1.4 ASPH. #11663)