Rallysman, I have only one lens capable of the short focal lengths that your 17-50mm probably is, and it's a 50mm prime (f/1.4). Great lens, but without zoom it's pretty hard to capture moving targets like fish. I've mostly been using the weak-nut kit lens which is 18-55mm f/4.5-5.6 (IIRC). But I do get your point, and will experiment more. One problem is that have no flash other than what came on the camera, although I'd like to add that to my Christmas list. I notice the noise on a 1600 ISO shot, but even at 800 the images seem pretty clean.
I'd like to see some examples, yes. Do you have any posted somewhere? If not, I'm PMing you with an email addy. Thanks.