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: grduprey at mchsi.com (grduprey at mchsi.com)
Date: Wed, 28 Mar 2012 21:13:32 -0500 (CDT)

For its performance it is very reasonable.  My next lens purchase for the 
D700.

Gene

----- Original Message -----
From: "Leowesson" <leowesson at gmail.com>
To: "Leica Users Group" <lug at leica-users.org>
Sent: Wednesday, March 28, 2012 8:38:58 PM GMT -06:00 US/Canada Central
Subject: Re: [Leica] Why don't we see more large-aperture wide-angle lenses?

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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In reply to: Message from leowesson at gmail.com (Leowesson) ([Leica] Why don't we see more large-aperture wide-angle lenses?)