Which is better, a card camera or an ordinary camera?

1, the card machine adopts a "periscope" lens, which hides most of the lens vertically inside the machine body, refracts the light with a 45-degree reflector at the light entrance of the lens, and then acts on the photosensitive element through other lenses in the lens.

Its advantage is that it is light and the camera can be made very thin. However, its disadvantages are small luminous flux, complicated lens structure, inevitable loss of light refraction and poor imaging effect.

2. The "telescope" lens is used for portable computers. Most digital cameras adopt lens structure. When shooting, the lens extends out of the fuselage, and when focusing, you can see the obvious lens movement. The photosensitive element is located at the end of the lens and is in line with the lens.

The advantage of telescopic lens structure is good imaging effect, but the disadvantage is that the moving parts of the lens are exposed outside the camera body because of its large volume and thick camera, which is easy to be contaminated with dust.