Using astronomical photo

Helps guard the blur in a picture on astronomical assembly or at high magnification. Very effective, very cheap, and no prism movement on Alpha Sony, as on "traditional" reflex.
To activate the remote control: with the round wheel, left-click and then enable the "Remote Control" mode in "Training" (under the mode "10 seconds" so you have to scroll down to find this feature).
For those who want to start from the back of the box, there are wired remote controls, up to you to choose according to your needs.