I have a Canon 4000D and I would like to take some long exposure photography. It only allows shutter speeds up to 30 seconds and I would prefer to have the ability to take shots that are exposed for 1 minute or more. Is it possible? I'm OK with using 3rd party software like CHDK if I have to.
It is not possible to select exposure times longer than 30 seconds on most DSLR's.
If you want an exposure time longer than 30 seconds, you have to use "Bulb" mode. You set the camera to bulb mode, and hold the shutter button as long as you want your exposure to be. Because this is not very convenient, most people use a remote control to open and close the shutter. This can be a wired remote, a wireless remote control or a telephone app(although one could say that that is also a wireless remote).