Is the camera concave or convex?

The lens of the camera has convex lens and concave lens, which is a combination of convex lens and concave lens.

The effect of overall synthesis is a convex lens. The convex lens can converge the real image to the other side of the lens to form the real image, which exposes the film or electronic photosensitive element, but concave mirror can't.

The lens in the camera is made of optical glass with different refractive indexes, and the convex lens and concave lens are made separately to combine them. Convex lens dispersion, concave lens pull-back dispersion (positive and negative effects). Therefore, the later camera lenses are all composed of convex lenses and concave 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.

Tips for choosing a camera:

1, determine your own needs.

Before buying a digital camera, you need to determine your own needs. Do you want to take daily photos or professional photos? How many pixels does the camera need? Do you need optical zoom or digital zoom? These problems need to be clarified before you can choose a better camera.

2. Know the specifications of the camera

Before choosing a camera, you need to know its specifications. Such as the number of pixels, aperture, shutter speed, ISO and so on. For beginners, it is more important to choose a camera with good shooting effect.

3. Study the camera brand.

Different brands of cameras have different functions and different prices. The more common camera brands are Canon, Nikon and Sony. You need to study the advantages and disadvantages of these brands and choose the camera that suits you best.