When Live View mode was first introduced on Canon EOS DSLR cameras some photographers were confused. Surely holding a camera at arms length so you can see the LCD screen would create camera shake. The reality is that Live View has enabled different kinds of photography to be possible or at least made less arduous.
I’ve found that Live View mode is something I’m using from time to time, however I recently had a bought of head scratching when using the EOS 60D and Live View with some simple radio triggers. Cameras like the EOS 7D, EOS 5D Mark II & EOS 60D have the option to reduce the noise of the shutter mechanism via the Silent shooting option in the Live View settings. If the function exists then the three options are Mode 1, Mode 2 and Disable.
In the EOS 60D manual the descriptions of the modes are as follows.
Mode 1: “The shooting operation noise is quieter than with normal shooting. Continuous shooting is also possible. High-speed continuous shooting will be approx. 5 fps.”
Mode 2: “When you press the shutter button completely, only one shot will be taken. While you keep holding down the shutter button, the camera operation will be suspended. Then when you return to the shutter button’s halfway position, the camera operation will resume. The shooting noise is thereby minimized. Even if continuous shooting is set, only a single shot can be taken in this mode.”
Disable: “If you use a TS-E lens to make vertical shift movements or use an Extension Tube, be sure to set this to [Disable]. Setting it to [Mode 1] or [Mode 2] will result in incorrect or irregular exposures. When you press the shutter button completely, the shutter will sound like it took two shots. However, only one shot will be taken.”