Archived posting to the
Leica Users Group, 2012/04/07
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Subject: [Leica] When a Biogon is no match for THE Biogon
From: tgray at 125px.com (Tim Gray)
Date: Sat, 7 Apr 2012 10:53:11 -0400
References: <CAF8hL-FHOzYfurv9pp1a3+u1f3_39HGYsohp-=vvN=HOdG+Z9w@mail.gmail.com> <CABmfTOXQYh21UQ5kbtt+h_-9F=XFsOV-p7--mfH2c4UMaoHC1g@mail.gmail.com> <20120406141008.GW69877@selenium.125px.com> <CABmfTOW2F2p1H+ASbFgN7+ButbovFGEiqXrtRBq2vWbsQ6=C_w@mail.gmail.com>
On Apr 07, 2012 at 12:29 AM +0930, Marty Deveney wrote:
>Symmetrical wides have very predictable single direction distortion,
>while retrofocus lenses (and I call anything where the exit and
>entrace pupils are different sizes as "retrofocus") have wavy or
>"moustache" distortion. All the Zeiss ZM wides and all the current
>Leica wides have this moustache distortion, including the 21/4.5, and
>the images don't look like those from symmetrical wides.
The ZM 21/4.5 DOES have the same size exit and entrance pupils. For
that matter, so does the 28 Summicron. Not that they are 100% by the
book symmetric lenses, but...
Replies:
Reply from benedenia at gmail.com (Marty Deveney) ([Leica] When a Biogon is no match for THE Biogon)
In reply to:
Message from richard at richardmanphoto.com (Richard Man) ([Leica] When a Biogon is no match for THE Biogon)
Message from benedenia at gmail.com (Marty Deveney) ([Leica] When a Biogon is no match for THE Biogon)
Message from tgray at 125px.com (Tim Gray) ([Leica] When a Biogon is no match for THE Biogon)
Message from benedenia at gmail.com (Marty Deveney) ([Leica] When a Biogon is no match for THE Biogon)