Archived posting to the Leica Users Group, 2012/03/28

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Subject: [Leica] Why don't we see more large-aperture wide-angle lenses?
From: leowesson at gmail.com (Leowesson)
Date: Wed, 28 Mar 2012 20:38:58 -0500
References: <E79E94CF-54D6-4134-B7AB-3270E4F5F9D0@mac.com> <CAF8hL-EA=RQQqkTx2KBAeTueFAs6Rbzs9sY7RvCj59VnFw8tEw@mail.gmail.com> <015501cd0d40$0a9298e0$1fb7caa0$@earthlink.net>
 
Reasonable?  14-24 2.8.  2k.  

Leo Wesson
www.leowesson.com

On Mar 28, 2012, at 19:08, "Frank Filippone" <red735i at earthlink.net> 
wrote:

> Nikon and Canon both sell them....at reasonable prices....  They must be
> retrofocus lenses to work on an SLR.
> 
> Maybe the problem is ... reasonable prices....
> 
> Frank Filippone
> Red735i at earthlink.net
> To do a wide angle fast lens, you will need retrofocus design, even for
> rangefinder where there's no mirror box. The mostly symmetrical designs 
> like
> the Biogon do not scale to fast aperture. If I understand it correctly, a
> retrofocus would be like putting a reducer at the back of a longer than 
> wide
> angle lens, thus adding complexity. And since fast lens make the aberration
> situation worse, further complex design is needed to control them. So it's
> sort of like a double whammy.
> 
> 
> 
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Replies: Reply from red735i at earthlink.net (Frank Filippone) ([Leica] Why don't we see more large-aperture wide-angle lenses?)
Reply from grduprey at mchsi.com (grduprey at mchsi.com) ([Leica] Why don't we see more large-aperture wide-angle lenses?)
Reply from jayanand at gmail.com (Jayanand Govindaraj) ([Leica] Why don't we see more large-aperture wide-angle lenses?)
 In reply to: Message from abridge at mac.com (Adam Bridge) ([Leica] Why don't we see more large-aperture wide-angle lenses?)
Message from richard at richardmanphoto.com (Richard Man) ([Leica] Why don't we see more large-aperture wide-angle lenses?)
Message from red735i at earthlink.net (Frank Filippone) ([Leica] Why don't we see more large-aperture wide-angle lenses?)