Quote:
Originally Posted by Dennis
I have several Canon EOS T-rings that have this screw and all of them fit my Canon 40D as is, that is without the screw being removed.
However, I have noticed that when the T-ring is fully mated with the 40D, there remains a very slight rotational movement, even when the bayonet is “clicked” into place.
Therefore, I had assumed (but haven’t tried it yet) that this grub screw could be adjusted to remove that small amount of rotational movement?
I’ll have a play with mine later and see what it does.
Cheers
Dennis
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That is exactly the function of the same screw in a typical Nikon bayonet.
It takes up the small amount of slack.
It also prevents someone from inserting the lens at the wrong insertion
gap...so that only one spot in the 360° is the correct insertion spot.
Without the screw, any of the 3 entry spots (separated by 120°) can
be the entry point, but the lens never clicks in securely.
My advice would be to err on the side of caution and leave it in,
and only take it out if you are happy the camera is not going to fall 6ft on
to concrete when you bump it!
Steve