Of the lenses I use most frequently, which would be best for close-up photograph y (generally 1:1 or so), a 135mm or a 210mm, both Symmar-S? I know that in the 3 5mm world, a 100mm macro lens will allow more distance between lens and subject than a 50mm macro, but I also realize that I need 420mm of bellows draw for 1:1 with the 210mm. I use a Wisner Expedition, so bellows draw isn't too much of a f actor. What are the pluses and minuses of using these focal lengths? Please avoi d the "you should use a lens optimized for 1:1" angle in favor of the arguments for and against the lenses I already own. Thanks in advance -- this forum is so incredibly awesome!