Here are a few test photo for you to get an idea. From a quick post-process, the highlight recovery work well with 6 to 7.3. I would say 5 to 6 sec are good, longer than that color will be watched out. 7.3 is a bit too long when they fire a lot of fireworks but still manageable in post.
I think it also depends on the distance too. If you are closer, shutter speed need to be adjusted. Another setting is safe to say keep it the same.
Location is very important because once the show start you can't move much to make a difference. Go early find good location. You can change setting anytime you want but not the location.
Last, I use continuous shooting so it fires one after another non-stop. I tried another methods before and I found that if I have to keep on press the remote control, I will either forget, or keep my eyes focus too much on the camera and enjoy less of the fireworks show! Or if I do interval shooting, I often miss a moment. You know, the camera will fire...wait for the count...fire again...wait for the count again, and sometime it misses the moment while waiting. Continuous shooting will ensure I don't miss anything until the end. and the most important for me is it allows me to enjoy the show rather than keep looking at the small LCD. Spend time less than 5 minute at the beginning of the show to set it up and forget about the camera until the show end.
Basic information: K3, DA21 smc, dng, f8, ISO100, Continuous shooting, post-processed with almost the same setting.
6sec
7.3 sec
10 sec
30 sec
Last edited by tokyoscape; 11-03-2019 at 05:35 AM.