100-300 or 75-300?

Fast AF indeed. Slow in terms of aperture so it's really a daytime use lens.

I'm not much of a BIF person. I have a bird picture but it's static, shot at 300mm, and a BIF picture that's not really a bird (shot at 75mm)...

I got the 75-300 because 1) 75mm is closer to the long end of the 12-50 kit lens than 100mm and 2) it is smaller and lighter than the Pana 100-300 and my whole reason for moving to m43 was to go smaller and lighter.

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Slowly learning to use the Olympus OM-D E-M5.
Public pictures at http://debra.zenfolio.com/.