Canon 7, any precautions when attaching a long focus lens ?

[Jimbo035]

I have recently bought a Canon 135/3.5 lens for my Canon 7. I'd welcome confirmation that this lens' distance scale should be set to the nearest limit before screwing it onto the camera - even though doing so the part of the lens which activates the focusing mechanism protrudes slightly. I hope this is how it should be....

 

[Mackinaw]

Yes, your lens should be set to the close focus mark when putting on the camera. Doing so will prevent the focusing cam on the lens from banging against the cam in the camera while you mount the lens.

Jim B.

 

[Goody]

Is this true for all Canon lenses or only telephotos? I somehow assumed that the focus lock on my 1.8 50mm was supposed to be engaged (ie focus at infinity) when unmounting/mounting the lens -- am I wrong?

 

[mdarnton]

Only for the ones with the short separate cam on back. The ones with a continuous strip all around the lens don't slap the cam follower every time around.