| There's basically two ways to shoot firwworks: low ISO / long shutter (requires tripod), or high ISO / short shutter (can potentially be done handheld). Either way comes with the possibility of noise. But if you're concerned with the slow shutter speed NR kicking in, maybe the best compromise would be to find the ISO / aperture combo to give you decent exposures at 1 second, so you don't have too much noise from high ISO nor from too slow a shutter speed but also don't have to wait for the slow shutter speed NR to kick in.
As for the original question, I don't really get it. I mean, if you own all three lenses, surely you have an idea of how they differ in field of view? And surely you've sene fireworks and have some idea of how much room they take up in the sky? You can then decide for yourself which field of view is what you want. 14mm would take in quite a bit of sky; you'd have to be right below the fireworks for them to fill the frame. 70mm or more would be fine if you were aching from a mile away. But normally, it seems that you'd want to be somewhere between, meaning the 28-75 is the obvious choice. |