Can I use a Bolex H 16 Octameter Viewfinder in a Speed Graphic 4x5 camera? I am just navigating eb...ay non-stop looking to get a cheap speed graphic (got one last night (not that cheap)) and came across a Bolex H16 Octameter viewfinder that covers 8 focal distances? from 16 to 150. Can I use this on a speed graphic or this is just for the Bolex film cameras? I am asking because the guy is local and the price is $20 thanks !