[OM] OM to EOS adapter

[usher99]

JK writes:

I have several adapters with emf focus confirmation chips on them.
These chips allow the user to program the focal length of the lens and
the wide open aperture.


I have used a different chip that uses the DOF preview button (not the 
shutter and I like that) to activate it. One requires a wide aperture 
programmed in first to use the AF confirm with any precision--
seems to quite good on the CV180/4 though the VF is OK with that lens. 
(depth of focus on the standard screen seem to be about F4 anyway)
It is a pain to reprogram it for the correct aperture. I think it may 
be easier with the emf chip? Do you find that to be the case?
Mike



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