I primarily work with primes, particularly in the 24-80 range, but I find that zooms are useful in certain circumstances. As Stone has already mentioned, some of the newer model zooms are actually quite exceptional. But even some older glass can be very useful. I own and use two of them, both from the Vivitar Series One group. The first is the ubiquitous 70-200, which is really quite a good lens though heavy. These are very inexpensive and it seems everyone wants to get rid of theirs on e-bay. I don't really understand it either because it is one of the best school play zooms I have ever owned. The other is a bit harder to find, but a truly wonderful lens, the 90-180 flat field macro zoom. This is a very handy lens and I use mine a lot, actually more frequently than the 70-200. It produces magnificent macro pictures.