[APML] Pentax film plane to mount distance

[Matthew Tippett <mtippett@ticons.com.au>]

Hello,

I wonder if there are any Pentax AP people here?

I have got a number of Pentax bits and pieces and I am looking at using
these for AP.  So the main question that I have is is there any standard
mount to film plane distance for pentax 35mm equipment?

I have seen conflicting distances of 43 and 55 mm.  (And both my pentax
bodies have film in them :).  I am not too worried about the absolute
accuracy of the distance, I will fine tune later.

(This distance is for building a knife edge focuser and adapting a
webcam for guiding :).

Regards,

Matthew
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