not that I have the money anytime soon to invest in this lens, or that this lens would justify approx 2500 (used) vs what I would gain from it... but.... would the shake reduction on the 645 DA 90mm f2.8 medium format lens work on a 645n series film camera? I guess I am also assuming first it would mount and work normally to start with... I am referring to this one: PENTAX HD D FA645 Macro 90mm F2.8 ED AW SR 4549212217586 | eBay HD PENTAX-D FA645 MACRO 90mmF2.8ED AW SR / Macro Lenses / 645-mount Lenses / Lenses / Products | RICOH IMAGING
