Archived posting to the Leica Users Group, 2009/01/20

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Subject: [Leica] Petition for initiating M8 lens identification in firmware
From: leica at web-options.com (Bob W)
Date: Tue Jan 20 16:15:16 2009
References: <E2C3B2FE-3B3E-4FEF-B466-E0DF0A87832F@mac.com><36172e5a0901201415r11fd39c0k14ca8efb9f33c169@mail.gmail.com> <6af76ca00901201531j70e140bcpf7037b6c9e2f8bb1@mail.gmail.com>

> This would involve a menu of 64 options. 

Not necessarily. It could involve 2 menus - one to specify the focal length,
another to specify 'lux, 'cron etc.

Presumably the purpose of dialling this information in is to allow the
firmware to weave its magic, as it does when it reads the lens coding.
However, it leaves the possibility wide open of forgetting to dial in the
right details when you change the lens, so the firmware would apply the
wrong magic. The damage this could cause might well outweigh any advantages.
This possibility does not arise with lens coding.

Bob



> Geoff
> 
> Lets have a discussion on the option to have a menu option on the M8
> to override the physical 6-bit coding of lenses. This would involve a
> menu of 64 options. I have a nice 21mm Zeiss lens I use on my M6TTL
> and it would be nice to use on my delayed M8 without going through the
> hoops of some third party engraving appropriate 6 bits notches on the
> lens mount and messing about with black and white nail polish. Perhaps
> more to the point I have a number of older Leica lenses, both M and
> LTM, I would like to use on the M8 (when it arrives) without having to
> wait weeks if not months for Leica to code them - by the way do they
> support LTM lenses on the M8?
> 
> What I am saying as a Leica User I would find this a very attractive
> option. Technically it is a trivial option to implement.
[...]


Replies: Reply from grduprey at mchsi.com (grduprey@mchsi.com) ([Leica] Petition for initiating M8 lens identification in firmware)
In reply to: Message from mitcha at mac.com (Mitch Alland) ([Leica] Petition for initiating M8 lens identification in firmware)
Message from hopsternew at gmail.com (Geoff Hopkinson) ([Leica] Petition for initiating M8 lens identification in firmware)
Message from crbirchenhall at googlemail.com (Christopher Birchenhall) ([Leica] Petition for initiating M8 lens identification in firmware)