What lenses are the eyepiece and objective lens of the camera?

The eyepiece and objective lens of the camera are convex lenses. A camera is a kind of equipment that uses the principle of optical imaging to form an image and records the image with a negative. This is an optical instrument used for photography.

In modern social life, there are many devices that can record images, all of which have the characteristics of cameras, such as medical imaging equipment and astronomical observation equipment.

History of camera development

The earliest camera structure was very simple, including only a black box, a lens and photosensitive materials. Modern cameras are more complicated, including lens aperture, shutter ranging, framing, metering, filming, counting, self-timer focusing, zooming and so on. Modern camera is a complex product that combines optical precision electromechanical integration technology and chemical technology.

1550, Italian cardano put the lenticular lens in the original pinhole position, and the image effect is brighter and clearer than the black box.

1558, the Italian Barbaro added an aperture to the device in cardano, which greatly improved the image definition. 1665, John Zhang, a German monk, designed and made a small portable single-lens reflective image camera box, which could only be used for painting because there was no photosensitive material at that time.