The camera uses what controls the amount of light entering the lens

The camera uses the aperture to control the number of rays (** degrees) of the incoming lens. The shutter controls the amount of light entering the lens.

The aperture is a device used to control the amount of light that passes through the lens and enters the photosensitive surface of the body, which is usually inside the lens. Expresses the aperture size with an f-number. It is not possible to change the diameter of the lens at will for a lens that has already been manufactured, but it is possible to control the amount of light transmitted through the lens by adding a polygonal or circular aperture grating with a variable area inside the lens, and this device is called an aperture.

The shutter is the mechanism used by the camera to control the effective time of the photosensor. It is an important part of the camera, and its structure, form and function are an important factor in measuring the grade of the camera.

I graduated from photography, and my camera mainly relies on shutter speed, but also aperture, and of course sometimes gain can also play a role.

Aperture and shutter.

Aperture: Equivalent to the thickness of a water pipe.

Shutter: Equivalent to a switch mechanism (faucet) to control the flow time.

**Amount: Equivalent to a fixed-size container, small aperture plus slow shutter, or large aperture plus high shutter, as long as the water is just full, ** amount is the same.

Aperture: The amount of light coming in.

Shutter: Speed (the operation will understand).

ISO: Perception of light.

Support fully manual camera, you can experience it yourself.

Different lights need different combinations, so complicated Ha my novice reference.

Hello, the shutter is a device that controls the amount of light entering the camera by controlling the length of time it takes for light to enter the camera. Both the aperture and the shutter are essential components of the camera, and they play their respective roles in the camera's work and performance. There is one thing in common in its role:

That is, the aperture can control the amount of light entering the lens, and the shutter speed determines the time of light entering through the lens to call the trapped head. In order to control the amount of light sensitivity of the film in the camera, you can adjust (aperture) to control the amount of light entering the lens, or you can adjust (shutter) to control the burst time.

(1) When the shutter is changed from 25 to 50, the ** time ratio is t1t2=1251

2) ** time becomes twice the original, then the corresponding aperture area becomes half of the original, i.e. s1s2=12;

3) From the area by s= r2: s1

s2=π (1

2×r)2=12

Solution: r, that is, the aperture corresponding to the shutter 50 is.

Therefore, choose D