When to use shutter release?

When they need to use the camera shutter on-line? Basically, as long as the camera is mounted at the feet shelf and the shutter not on built-in Timer (Timer) start words, they need to use shutter release. The reason is very simple, use the tripod is to prevent camera swings, therefore, we also don't want his finger to press the shutter action on any impact on camera, even if is quite weak vibration.

The types of shutter release

Shutter release can be divided in...