Terrific, JC. Thanks for the detail and scope. Really helpful. I was thinking of the zoom when I said the Tamron 17-50 was FX, So I'm not quite a dopey as I sound. I'm on good terms with the event organizers and know some of the speakers, so access and posing should not be a problem. Flash is OK, but I want to do without as much as possible. The zoom is the Nikon 28-300 VR II, not too fast but with the crop factor I can reach out a good bit if the light's there. Will post some results if they're any good.