[Leica] Inconsistent lens detection on M 8

[grduprey at mchsi.com (grduprey at mchsi.com)]

This is very true, if the lens is not triggering the correct frame lines 
then it will not work.  I had bought a new coded 21/2.8 Asph lens back in 
2008, and the camera was not reading the data.  It turned out the 21 had the 
old lens mount flanges, and did not trigger the correct frame lines.  After 
having it checked at Photokina in 2008, by the Leica techs at the show, I 
sent into Leica and they replaced the mount with the correct one and it then 
worked perfectly.  All the tech guys at Photokina could figure is that it 
was a very early coded lens and it had the older lens mount, which did not 
have a cam that would bring up any lens frames.  It was one of the last of 
the Chrome 21's.  When we manually selected the correct frame lines it 
recorded the lens data.

Cheers,
Gene

----- Original Message -----
From: "Geoff Hopkinson" <hopsternew at gmail.com>
To: "Leica Users Group" <lug at leica-users.org>
Sent: Saturday, March 29, 2014 4:39:01 PM GMT -06:00 US/Canada Central
Subject: Re: [Leica] Inconsistent lens detection on M 8

On the camera side you can try cleaning the 6 bit sensor panel. For your
lenses it would depend on the quality and method  of the 6 bit coding that
you have applied (for the non-factory coded Leica lenses). For the M8, in
addition to having a valid and readable 6 BIT code you also need frame-line
agreement to satisify the logic. That is to say, in most instances, the
camera expects a matching frame line set (50+75 for a 50 code etc).


Cheers
Geoff
http://www.pbase.com/hoppyman


On 30 March 2014 07:03, Richard Endress <rendress at mac.com> wrote:

> Hello all,
>
> I am just getting around to coding my lenses.  I am getting inconsistent
> results.  My 28mm f2.8 and 50mm f2.8 show up fine but my 50mm f2 and
> Voigtlander 50mm f1.5 and 12mm f5.6 are not detected.  A Voigtlander 35mm
> f1.7 was not detected on the first shot but detected on the second.  Any
> ideas why the inconsistency?  richard
>
>
>
> Richard Endress
> rendress at me.com
>
> http://questingbeast.zenfolio.com
>
> http://gallery.leica-users.org/v/grabshooter/
>
>
>
>
>
>
> _______________________________________________
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>

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