Originally posted by richit Thanks for the input, any older lenses w/ a fixed aperture around 100mm focal length? or am I way out of my price range?
The M135/3.5 that Matt recommended is a fine choice, and it's quite cheap. I have it and like it, but for my purposes (mostly concert photography), I often prefer something a bit shorter and faster, and given that you specifically asked about 100mm, I would like to put a plug in for the M100/2.8, which is also in your price range (usually around $100-$150). Also, there is an M120/2.8 available on the marketplace that could be a great compromise between those two focal lengths.
Of course, even 135mm isn't *that* long, even with the "crop factor" - it's not for wildlife. But I find I don't tend to shoot over 135mm very often except for wildlife, and given that you can always crop, I personally wouldn't feel too limited by having only something in the 100-135 range as your long lens. Depend on whether you value the large aperture over the convenience of the zoom.