Went to our local fireworks last night. It probably isn't saying much, but these are the best firework photos I have managed. I accidentally shot the photos in RAW - I just converted them with default settings in the Sony software (so slow!!). I was surprised to find that fireworks scene mode produces RAW files. I suppose that all it does is fix an aperture and shutter speed. However, I shot most of the photos in A mode.
I felt that the RX100's small size and weight makes it fun for this kind of thing. I used a gorilla pod tripod. I was shooting in manual focus for the fireworks themselves. The annoyance with the camera was that the focus is lost when the camera is switched off, even in manual focus mode. Could have done with a scale on the LCD to indicate the focus distance too - it's hard to judge it in the dark!
A high iso view of the beach before the start of the fireworks
The following firework shots are somewhat cropped
This last one is a very long exposure, but the girls were sitting so still that I thought I'd give it a go.