Godfrey DiGiorgi asked: > Question: I have a set of extension tubes, a 2x-S teleconverter, and > the A50 Macro. I'm trying to make the greatest magnification possible > out of the set. I presume the way to do this is to assemble > Camera->Tubes->Converter->Lens > ... eh? > > I'll be experimenting, but if someone's already done it I'd like to > know.
I think you get more magnification if you put the camera -> converter -> tubes -> lens if you do the math and assume 50mm of extension: your way is equivalent to a 100mm lens with 50mm of extension yielding something like 1:2 magnification (half life size) the other way is equivalent to a 50mm lens with 50mm of extension yielding 1:1 magnification then doubled by converter to 2:1 magnification (twice life size). that is with the lens focused to infinity. the magnification changes when you have it focused closer but the general formulas still pretty much hold up. Your way would give you much more working distance. Tom Reese
