quality difference in macro setups (pentax645n)

[joseph_ho]

how does the optical performance of 120macro compare to a reversed

75mm or close up lenses on the 75 or 150? how about an extention tube

on the 75 or 150? and if i get the 120 macro,how does this lens

perform at infinity focus if it does at all?

for some background, i do outdoor photography and i'm looking to add a

longer lens to my setup that includes the 75 and 45 as well as some

macro capability without the weight of two lenses.

[mark_windom]

I can't comment on the close up lenses or extension tubes but I can tell you that the 120 macro is a terrific lens. Incredibly sharp for both macro and infinity work. I use the manual version but I would assume the AF version is just as good.