There is a hole in front of the camera to see what it is called.

It should be above the back of the camera. By the way, this is an electronic viewfinder. Generally speaking, telephoto DC similar to SLR and some top DC are available.

The viewfinder setting on the telephoto camera is suitable for the viewing habits of SLR users. In addition, it can save electricity.

The function of the card DC comes from the original camera viewing mode, that is, there is a transparent viewing hole on both sides. In the past, when using film, photographers could not take pictures through the lens, so they had to cut a hole in the upper right of the camera and add a lens to take pictures. Later, with the development of electronic industry, paraxial framing became real-time framing of display screen. This viewfinder is not very useful, but it is kept on some top retro DC to please some old photographers. For example, canon's G 1 1.

If there are holes in the front and back and they are connected together, the camera in your hand should be a paraxial camera. Mainly depends on whether your camera uses film. At present, some Leica cameras still use paraxial framing, such as M6/M7. There are others that don't use film, such as Leica M8, M8.2 and M9, which are called paraxial digital.