Originally Posted by Scott1541
Would that even work? You can carry on twisting the focus ring forever, it never stops
E: You can feel it get stiffer but surely that point could move in relation to the position on the actual focus ring you turn.
This is how I've done it, there may be better ways but this took 30 seconds to work out and works each time.
3 marks on the body of the lens, 2 on the focus dial:
| | focus dial
| | | lens body
When the 2 left-most marks of the body line up with the lens, it's completely unfocussed (if the lens is in focus, dial another another full rotation until this is the case).
Dial the focus until the left hand mark of the focus dial lines up with the right hand mark of the lens body. This is the point of infinity focus. Providing you completely unfocus to get the same start point each time, this works without fail
Now I need to find something better to mark the lens with, I tested with a make-up pencil I found on the girlfriend's dressing table