Quote Originally Posted by SansSanity


That was a thought that had also crossed my mind. The full frame is very enticing. What about upgrading to a 5D would improve my low light photography? The lower noise levels at higher ISOs?

Bingo.


Quote Originally Posted by SansSanity


Since April of last year when I picked up my camera the lens I've used the most is the 50mm. Their have been situations where I've wanted some reach and others where I don't have enough room to back up and get everything in the shot. I just got the Sigma 28mm from a friend a few weeks ago and I've loved the wider angle of view. But I am a little envious of my other friends 75-300mm and being able to get up close and personal with subjects far away.
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Remember 28mm on FF is actually 28mm--not 49mm's as it is now on your XTi. Then again you will loose out on the long side so picking up a 100f/2, 135/2 or 70-200/2.8 may be in your interest in the long run. But 85mm's for shows will get you by on FF if you are close enough.