I think I’m going to need some practice. I took the camera out this evening and made a first attempt at photographing fireflies.
You set the camera to manual focus at infinity and open the lens up. Then you shoot multiple exposures at a reasonable ISO for a good few seconds. I chose ISO400 for 15 seconds and took about 20 photos. Back home, you import the images into Photoshop and set all the layers to Screen. This allows the trails to be overlayed without the background becoming too bright. Here’s the best result of four attempts ….