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

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: Re: [Leica] need input on Kobalux lens
From: Guy Bennett <gbennett@lainet.com>
Date: Mon, 18 Feb 2002 16:07:57 -0800
References: <001401c1b8cb$3f27f660$697ba8c0@deadcpu>

>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 ourworld.compuserve.com/homepages/dkieltyka/Kobalux21.htm 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.
>Dante


If the vignetting was due to your filter, you might also consider switching
to Heliopan, who mount all of their filters in slim mounts.

Guy




>> 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
>>
>>
>>
>> --
>> To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html
>
>------------
>Dante Stella
>http://www.dantestella.com
>
>--
>To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html

- --
To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html

In reply to: Message from "Olivier T. Nguyen" <onguyen@optonline.net> ([Leica] need input on Kobalux lens)