Focal plane mark

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 Post subject: Focal plane mark
Unread postPosted: Mon Mar 10, 2014 1:23 am 
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Most cameras have the focal plane marked somewhere on the body, usually the top plate.
I have been unable to find one on the M, does anyone have any thoughts ?


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 Post subject: Re: Focal plane mark
Unread postPosted: Mon Mar 10, 2014 8:30 am 
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On the film cameras, there used to be a symbol (a circle with a line through it) under the film advance lever. On the digital models, this disappeared. The focal plane is, by spec, 27.8 mm behind the M mount flange, if that helps.

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 Post subject: Re: Focal plane mark
Unread postPosted: Sat Oct 25, 2014 8:28 pm 
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I have the same dilemma, I used a depth gauge to measure to front of shutter curtain, not wishing to risk damage to chip and found that the very end of the last digit on the 7 digit serial # on my M agreed exactly, whilst this is perhaps not as precise as one might wish, it is close enough for my purposes. Leica seem a bit of a strange mob in some ways, they tend screw up on these kinds of details, my M is the only camera I own that does not have the FP witness mark clearly scribed on the top plate. I also purchased a Really Right Stuff bottom plate, which lens centre marks scribed and incorporates QR machined in, I find this very handy and faster than the standard base plate and I can flip vertical easily.


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