I always dremt to take photograpy of a firework. And finally I managed to do this. Unfortunately, fireworks are very short events and it is not possible to change spot adjusting for the best view. One does not know EXACTLY where it will happen. Noway to set composition before it starts...
For my first firework session on March 6th 2011 (it was dedicated to the beginning of orthodoxal Lent) I choosen the spot at the Red Square in Moscow with Saint Basil's Cathedral that served as an excellent foreground.
My idea was to use exposure time which would be long enough to catch essential part of firework splashes. I wanted to catch not a short moment but development
Here are settings: (1) tripod, (2) ISO100 (to supress noise), (3) t=2sec, (4) f/7.1. I had to choose the last parameter (f/7.1) checking histogram. Now I think, that pairs (t=4 sec - f/11), (t=8 sec - f/15) or even (t=16sec - f/22) were worth to try, as well. But I prefered to get 'lot of something' rather than a 'little bit of everything'. So, I left experiments with aperture/exposure for next time limiting myself by experiments with focal length (18mm - 55mm).
Anyway, two images have been just approved on DT and here they are: