Archived posting to the Leica Users Group, 2002/02/18

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Subject: Re: [Leica] need input on Kobalux lens
From: Dante Stella <>
Date: Mon, 18 Feb 2002 18:22:32 -0500

Hi Olivier -

Normally, vignetting is present in superwide-angle lenses.

It is *not normal* in the newest Kobalux 21mm (I can't speak for the older
ones Adorama sells, both because it has a different optical formula and
because I don't have one), and that's part of why the front element is so
big.  I can send you the full-frame scans if desired.

See for a
discussion of the extremely low level of vignetting in the new lenses.

If you use a Tiffen or B+W filter even the new ones will vignette.  Stick to
Hoya or a thin-ring B+W.


> Hi everyone,
> I just test a roll of film on my leica M6 TTL with Kobalux 21mm lens.  I
> check the neg. and it look like alot of light fall off at the edge of neg.
> both side of negative not top and bottom.  does anyone has this problem ?  I
> check with kobalux website and also picture at Dante Stella website and
> those pictures did not seem to have light fall off.  these pictures might be
> crop out .
> can someone who use kobalux please confirm this matter for me.  is this
> light fall off usually happen to wide angle lens such as 24mm down?
> Olivier
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Dante Stella

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