Quote:
Originally Posted by Michael Hogan
............- the lens can move a few mm left or right with the lens locked in position.
Michael
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I have just seen this so I thought a quick job was in order.
I have just measured all the locking pins on the mounting flange on my Nikon bodies. This is 2mm.
I have done the same for all my lenses ( 11 ), extension tubes (2) and Kenko Pro & Nikon converters (3), and measured the notch on the mounting flange that engages the body locking pin. These measured a consistant 2.03mm.
The 0.03mm difference on the lens flange is required as clearance for the locking pin on the camera mounting flange.
As the body mount is sprung any slight rotational movement will have no effect as the mating surfaces will be in perfect contact.
I have an old independant converter on which the locking pin on the lens mount end is 1.95mm and the locking slot is 2.05mm so giving a total clearence of 0.10mm and that does allow a bit of twist in the lens. Nothing as drastic as your post though.
Any thermal expansion of the lens mount would be taken care of by the sprung body bayonet mount itself.
Don