Canon SLR generally has a lock key in the lower right corner of the back. What is the specific use? Why is it rarely used?

The lock key of Canon camera is a unique design specially designed for high-end products. Some models design this lock as a lever key, which exists independently, while some early professional machines of Canon design it together with the switch key to form a "three-level lever".

Here's another small example.

This is the "mode dial" that entry cameras can often see.

On "quasi-professional" cameras such as 5D series, this mode dial will also add a "lock button". This is also a design to avoid misoperation. Dials without lock buttons are easy to switch to other modes when used, but with lock buttons, the possibility of such accidents is much smaller.

On Canon's 1D series of "professional" cameras, this easy-to-misoperation mode dial is even directly deleted and replaced by a combination key that is less prone to misoperation.

Therefore, the more advanced and professional the camera is, the more detailed the ergonomics and operation will be. The lock button is a very important button. With the improvement of your technology, you will gradually realize its importance in the future.

The lock in the lower right corner of the back of Canon camera is a multi-function lock switch, which can prevent the main dial speed control dial and multi-function button from moving and changing settings.

In the creative shooting mode, you can set the (lock) menu setting to enable to prevent the following settings from being changed due to incorrect rotation of the speed control wheel: ① exposure compensation (when shooting P╱TV╱AV).

② Aperture setting for manual exposure.

③ Aperture setting of B-door exposure

Under the lock enable setting, the lock button under the speed control dial can temporarily cancel the lock setting to change the above settings.

It's a multifunctional lock, including the mode dial on the top of the fuselage, the speed control dial on the right side of the monitor and so on. The mode dial adjusts the shooting mode, and the fast dial adjusts the exposure compensation and picture playback on the display. Forget it, I'll give you a picture.

Lock the pulsator to prevent the hand from touching the pulsator and the aperture from changing when shooting.

For cameras, learning instructions is a compulsory course to learn photography well. Not just a lock key, all keys should be known and used.

Lock locks the large wave wheel to prevent the exposure compensation from changing. Generally, the turntable is locked, because it is easy to be touched to change parameters when shooting.

Some lenses have a long focal length, so the lens zoom system is easy to slide back and forth when it is carried. Pull down this lock button to lock the lens, so that the lens will not move back and forth when it is carried.

Another one who didn't read the instructions ...

It's no use. I don't need it

Lock the key. Fear of touching by mistake