Quote Originally Posted by Alan Klein View Post
The 50mm is roughly 28mm equivalent in a 35mm camera. The 65mm equals about 35mm equivalent.
I have and use both. Like so many other "what (fill in the blank) should I use" questions, it's really up to you. I use these two, and a 90 and a 180 depending on what I need to frame the picture at hand. YMMV.