DURST M300 PHOTOGRAPHIC ENLARGER - EXCELLENT - For sale I have a Durst M300 photographic enlarger , I am the original owner and this is one of the top of the line enlargers.. You will find everything in mint condition. Th enlarger includes a new bulb which has seen (10-15 hours), and the maker of the lens is Schneider_kreuznach, somm, F4.5, Lens number 10710868. F-stops are 4.5, 5.6, 8.0, 11.0, and 16.0. This lens is in MINT CONDITION along with everything else. The filter size is 70x70mm 2 3/4 x 2 3/4inch and is inserted in a slot that opens in the front of the prism chamber.