Quote:
Originally Posted by Tandum
Adam I used this page for distances.
It says, The 56mm back focus is measured from the rear of the threaded end of the reducer/flattener rather than from the shoulder. |
Thanks Robin - just so I get it right - that means 56mm from the rear of the threaded end of the flattener to the Canon sensor plane??
By the way - what a silly place to measure from - once its screwed in place - you can't see the rear of the thread....
Adam