There are 6 basic types of remote shutter release available. Most cameras will be compatible with at least one, if not all of these types of shutter release.
1 - Camera Self Timer Shutter Release
- Usually set from the camera menu and capable of allowing a delayed release of the shutter after pressing the button
2 - Cabled Shutter Release
- Mechanical (no batteries) cabled release, generally about a metre long, that plugs into a port on the side of the camera allowing instant or delayed (in combination with the self-timer) release as well as 'bulb' exposure. Threaded versions are also available in a 'plunger' style for older, film cameras.
3 - Infrared Remote Shutter Release
- A small, battery operated infrared remote offering instant or delayed release that can also work in conjunction with the self-timer. They will also activate the auto focus of the camera. These are generally dedicated to working with a certain camera brand and the camera must have an infrared port somewhere on the body.
4 - Bluetooth Remote Shutter Release
- These are usually brand specific and operate through a bluetoooth connection with compatible cameras. May be able to stop/start video as well. Generic ones are available for cell phones.
5 - Wi-Fi App Based Shutter Release
- Almost any wi-fi capable camera can be operated remotely through the camera brand app and the shutter released remotely from the app on your phone/tablet. They are generally very customizable.
6 - Radio Triggered Remote Shutter Release
- These are two piece, battery powered devices that allow triggering remote release of the shutter from great distances and even through walls. One piece sits on the camera and the other is held in your hand. Many of them also double as flash triggering devices.