1 have two lenses I'm unsure exactly what mount they are and whether or not they are useable on any modern systems. If the first one is a K-mount, then sweet! 1) SMC PENTAX-A 645 ZOOM 1:4.5 80~160MM I believe 645 is a Hasselblad system? Is that correct? What mount is this and does it have any worth these days? This thing appears to be in wonderful shape. 2) Tokina SZ-X 28-200mm 1:3.5-5.3 Same questions, mount, usefulness, and worth?