I have an opportunity to buy this unit, complete with a 45mm (not sure what model), an 80mm (1.9) and a 150mm (4.0), along with a flash and an extension tube. Does anyone have any experience with these lenses? My previous MF cameras have been TLR's so this is all new to me. Are there any other issues I should be aware of regarding this equipment? From what I've seen, the gear is in very good shape, and has been lightly used. Thanks in advance for the feedback. Cheers,