i'm trying to acheive something like this (no, i didn't take it): yes, i realize this can easily be done digitally, but that's not what i want. in fact, for the particular assignment i'm trying to pin this process down for, digital isn't an option. i've gotten some sort of so-so results thus far, but i still can't figure out exactly what i'm doing that isn't quite right. i'm shooting with my nikon n60 using the shutter priority option and my exposure is like 4 seconds long. that part all seems to be working out fine and i'm getting decent exposures, but the problem seems to be that the subject in the very center isn't staying as sharp as i need it to. i'm using a tripod, of course and i'm fairly certain the camera's not moving. i've been very careful about not shaking it when i'm zooming in or out. also, i can't figure out if it's better to zoom in or out for the best results. so, has anyone played with this effect before and had good results? am i just being an idiot and missing some important rule or something? :?