Originally Posted by bburns223
Brendan, what does 'meant for a full frame body' mean? Your EF 300mm f/4L IS was designed prior to the existence of dSLRs and crop factors. Does that mean it's meant for full frame, too?
I could as easily say, the 85mm f/1.2L is meant for full frame bodies. On a crop body, you've only got the DoF of an f/1.9 equivalent anyway, so why not get the 85mm f/1.8, and put the balance towards a 5D2?? [6]
If the 135mm focal length (216mm FF) works for the subject and available space, the 135mm f/2L is a great lens on a 1.6x crop body. Have no doubt - there are many people out there using that lens to capture indoor action and portraits on crop bodies.