Originally posted by mtansley Anyway, wouldn't both my APS-c lenses work anyway & I'd just have to be careful with composition?
Well they probably work just fine wih reduced sensorsize, but we all buy that expensive FF camera to use the whole sensor and not just part of it (for wich we can keep a spare K-5 in our bag).
For myself, I don't have any real wide-angle, since 31mm on FF is just moderate wide-angle, but I also don't use such lenses. It's all about your own needs.
If someone would only want a FF camera for portraits then basicly you are ready with a good portraitlens.