[genewch]

I have a 100mm f2.8 macro. I'm happy with it because it produces very sharp pictures when I take portraits, though focusing is a bit difficult. The background blur is natural. I see the MTF chart of the 180mm f3.5 macro is excellent, nearly 1 everywhere. I have the impulse to get it. So can I use this lens to replace a regular tele lens such as 200mm f2.8?

Can anyone tell me the difference between a macro lens and a regular lens? If a tele lens has advantages over a regular lens, why don't people usually use macro lenses (besides of $$)?