We’ll start with a good one. Shutter speed isn’t particularly difficult; it is just the amount of time your camera spends taking a picture. This could be 1/100 of a second, or 1/10 of a second, or three seconds, or five minutes. Some people build custom cameras that take decades to capture a single photo.
Your camera won’t let you take a decades-long photo. Instead, the longest allowable shutter speed tends to be around 30 seconds, although it does depend upon your camera. For example, on the Nikon D850, you can shoot any shutter speed from 1/8000 second to 30 seconds, as well as a time mode for even longer exposures. Other cameras generally allow similar settings. Read More