EOS-M with 22mm F2 STM. [IMAGE'S LINK: https://flic.kr/p/VefDRV]IMG_0938
This is handheld from a boat on the water in St Augustine, FL from this 4th of July.
Pre-focused at 10x on some distant lights in manual focus, turned off auto-focus (no hunting or delay). Stopped down a little to get depth of field. Raised ISO as high as needed to maintain a fast enough hand-held shutter speed on a rocking boat for the angle of view (in this case, 1/100s is comfy). I just timed my exposure when the firework first exploded to get streaks as the initial rate when it first explodes is much higher than once it's already exploded, so I could still get something at such a fast shutter speed.
by Martin Wise
, on Flickr