There are lots of reasons to use primes:
size
weight
price
aperture
image quality
But for me, the most important reason is that primes force you to think about whence the picture should best be taken in a way that zooms don't. Zooms encourage you to think about composition, whereas primes force you to think about perspective. Perspective is more important.
brainiac wrote:
But for me, the most important reason is that primes force you to think about whence the picture should best be taken in a way that zooms don't. Zooms encourage you to think about composition, whereas primes force you to think about perspective. Perspective is more important.
Thanks, brainiac, that's what I was trying to say earlier. Well put.