In a message dated 99-08-18 12:44:35 EDT, you, Morgan Sparks, write:
> Tom's macro inquiry got me thinking about an upcoming project: Shooting
> close-ups of an ornate pocketwatch that belonged to my grandfather. I
> have the 50/2 macro, but this lens isn't well suited for really close
> work (I'm told) or (I'm also told) for use with extension tubes. Why?
The cautions about the 50mm not being suited I think are meant for getting
farther away from dangerous animals (snakes) or scaring the subject, which
would hardly apply to a watch.
> Would I be better off with the 100 2.8 (or the 50 1.8) and extenders? I
> probably need about 5 or 6mm of critical DOF.
Depth of field, for a given aperture and object size, won't change. Only
macro lens have the special optical corrections for close up and macro
shooting. You have one of the best lens in the world for macro shots--use it.
Because of the close distance corrections, the macro lens will work better
with extension tubes as compared to the 100/2.8 or 50/1.8.
>
>
Warren
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