Working distance and background control. A 200mm puts you farther away than a 100, and often lets you be more selective in background. But the 200 is heavier and may require a heavier tripod. It is also bigger.
The TC costs you sharpness.
I think the best compromise in a field lens is a slow (f4) 100mm that goes half life size. Very useful.
-Lon
Joel Hughes wrote:
option here is to stop down more, use a tripod or flash.A macro lens won't help to improve the depth of field. Your only
Hmmm..ok, I can understand that. What are the differences then between a (so called) 100mm and 200mm macro lens? Are there any particular disadvantages to a 50mm lens & a x2 converter?
joel
