What principle is used to take photos

Optical principle.

The lens is used to image the optical system, composed of a series of optical lenses and barrels, each lens has a focal length and relative caliber of the two characteristics of the data; viewfinder is used to select the scene and the composition of the device, through the viewfinder to see the scene, wherever it can fall within the frame of the screen, can be photographed on film.

The rangefinder can measure the distance of the scene, it is often combined with the viewfinder, through the linkage mechanism can be linked to the rangefinder and lens focusing, in the distance measurement at the same time to complete the focusing.

Expanded information:

Precautions

1, often reset the camera settings

Sometimes you see what could be a good photo of a scene, but because the camera sensitivity and saturation are still stuck at the values of the last photo taken, thus missing the opportunity to be more frustrating. Avoiding this situation relies on checking and resetting. All of your camera's settings need to be changed after you take a picture, so that every opportunity to take the best possible picture is saved for the next shot.

2. Memory cards should be formatted when they need to be deleted

Formatting your memory card is a way of erasing all of its data, thereby re-recording any information about your camera. Deleting your pictures, on the other hand, is not. Therefore, always remember to format your memory card so as to minimize the risk of data corruption.

3 Update your camera's firmware often

Firmware is the software that transfers images within the camera, sets the parameters of the entire camera, and even determines which functions are user-operable. Check your machine manufacturer's website from time to time to make sure your DSLR's firmware is up to date.

Baidu Encyclopedia - Camera