There are actually two handles available for the CF 40-80mm lenses .
First part number is 40735 and for a slightly different design the
part number is 51700 .
I could not find any of the handles shown in the current V-SYSTEM
catalogue and also don't know , when these item where last produced .
The quick focus handle is for the 40, 50, 60, and 80mm CF lenses. The handle folds flat on the lens when not in use. Originally the part number was 40735 then later changed to 51700 in 1989 with a slightly different design.