[Leica] Why don't we see more large-aperture wide-angle lenses?

[liangjiyang at gmail.com (Kay Yang)]

The faster the lenses, the more stray light there will be entering the
front glass and therefore you need more elements or better glass to adjust
for those aberrations.  There is the 24mm f1.4 summilux and the 75mm
summilux but of course these lenses are big and heavy. It's simply a design
choice between portability, cost and practicality.

On Wed, Mar 28, 2012 at 12:10 PM, Adam Bridge <abridge at mac.com> wrote:

> Just curious. Since we were talking about the Nokton lenses.
>
> I have a Noctilux f1.0 50mm and a CV 35mm f1.2
>
> But as you head toward 28mm or 24mm it's f3+.
>
> As focal length increases above 50mm there aren't many fast lenses either.
>
> So, why the sweet spot between 35 and 50mm?
>
> I'm sure there are optical wizards who can explain this.
>
> Thanks!
>
> Adam
>
>
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