« on: February 27, 2015, 06:20:02 PM »
Since this lens is already so huge and heavy, I wonder if it would have been possible to have a drop-in filter system for it. That would have been AWESOME! You could use variable ND filters and polarizing fitlers.11mm focal length on a body with a 44mm flange distance requires a pretty heavy duty retrofocus design. Enlarging that BF distance to the levels required for a drop in filter as found in the super teles would be a step too far - weight, size and possibly optical quality would all suffer. Super teles due to their focal length alone have a very substantial BF which has compromise free space for a drop in filter together with space to accommodate a TC.