What role does aperture play in DSLR cameras?

1. Aperture priority means that the aperture is determined by you, the shutter is determined by the camera (automatic), and time priority is the **time is determined by you, and the aperture is determined by the camera (automatic).

2. The length of the lens may refer to the appearance. Most of the time, though, it's the length of the focal length. The number 80 200mm on the lens refers to the zoom range, i.e., the wide-angle focal length is 80mm, and the focal length at the telephoto end is 200mm.

There are also lenses such as the maximum aperture at the wide-angle and telephoto ends, respectively.

3. Focal length is the basic performance of the lens, which in principle refers to the distance from the center of the lens to the clear imaging surface. Generally, the longer the focal length, the smaller the imaging angle of view, which can illuminate the distant scene larger. The shorter the focal length, the larger the angle of view and the wider the illumination, but the smaller the image of the distant scene.

4. The equivalent focal length within 35 is generally called a wide-angle lens, 35 100, which can be called a medium focus, and more than 100 is called a telephoto. Note that this is an artificial distinction and there is no absolute standard for dividing it. So my division isn't necessarily accurate.

5. If you want to talk about it, you can write a book. If you don't understand, it is recommended to check the Internet more. And you verbally say plus points, who knows?

Definitely recommend you encyclopedia is enough.

The camera aperture can control the amount of light entering the camera, and the larger the aperture can make the aperture brighter, so if you feel that the light is insufficient when shooting, open your aperture.

Below, let's take a look at the camera aperture setting tutorial sharing.

What does the aperture of the camera do.

1. Make ** more hazy.

Aperture is a value of a DSLR camera, the same as the shutter and ISO, different apertures can get completely different effects, if you use a large aperture to take pictures, you will get a very blurred**, which looks very meaningful.

2. Make ** brighter.

At the same time, the aperture can also control the amount of light entering the camera, and the larger the aperture, the brighter it can be, so if you feel that the light is low when shooting, open your aperture wider (each lens has a maximum aperture value).

3. Make ** clearer.

The large aperture makes the aperture more meaningful, and the small aperture allows us to shoot the aperture more clearly, which is commonly used in taking group photos (dozens of people are very clear) to shoot commercial products (the details of commercial products are very important, and the aperture 10+ is a must).

When is it appropriate to have a wide aperture.

1. Shoot sketches.

Sometimes when we shoot some small objects (trinkets) with a special artistic conception of wheels, we will generally touch the circle of light to make the background blur and highlight the object we want to photograph.

2. Take portraits.

This method is also suitable for portraits, especially when shooting beautiful women (sugar water films) as wide as you can open, and generally use a prime lens (which can get a wider aperture).

3. Take close-ups.

Sometimes we need to shoot some close-ups, and while we lengthen the focal length, we will also increase the aperture to make the background blur highlight what we want to shoot, adding to the feeling and effect of the close-up.

When is it appropriate for small apertures.

1. Take a group photo.

When taking a group photo, you need to use a small aperture, so that everyone in the group photo can be taken clearly, and if you use a large aperture, only the person in the focus point will be clear, and the person next to you will be blurry.

2. Photograph landscapes.

It is also not recommended to open the aperture too wide when shooting landscapes, especially when shooting some magnificent scenes (and it is also recommended to use a wide-angle lens to get better results).

3. Photograph the product.

The product needs to be very detailed, so we have to set the aperture very small, and usually use a flash and a tripod when shooting the product (because the amount of light will be smaller when the aperture is smaller, and the light will become too dark without a tripod or flash).

Hello, glad for your question. 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. To express the aperture size, we use the f-value.

For the lens that has already been manufactured, we can't change the diameter of the accompaniment lens at will, but we can control the amount of light transmitted by adding a sail polygon or a circular aperture grating with variable area inside the lens, which is called the aperture. Camera apertures mainly include fixed aperture, cat's eye aperture, instantaneous aperture and shutter aperture. It has the effect of blurring the background. False good.

1. Lens

The cornea, the lens of the camera, is the first point through which light enters the eyeball. Its refractive power is about 42d, accounting for 1 6 of the surface area of the eyeball, with a diameter of 11 5 mm, a thickness of 0 6 mm, and a thickness of 1 mm next to it, commonly known as "black eyeball".

2. a casing

The sclera, the camera housing, which protects the structures inside the eyeball, is white and opaque, about 1 mm thick, and occupies 5 6 percent of the posterior surface of the eyeball. Commonly known as "whites of the eyes".

3. Aperture

Pupil - the aperture of the camera, commonly known as "Hitomito", has a diameter of 2 5 3 mm in diameter. The pupils become smaller when the light is strong and larger when the light is low, so that the light in the eye is always just right. Once out of balance, it is inappropriate.

4. Aperture blades

Iris – the aperture blades of the camera. If the light is too strong, the pupil sphincter in the iris contracts and the pupil is constricted; The light becomes weaker, the iris opening muscle contracts, and the pupil becomes larger.

5. Zoom lens

Crystal – A fully automatic zoom lens for a camera that sits behind the pupil and is a biconvex lens. Normal people can see both far and near, all of which depend on the adjustment of the crystal.

6. Film

Retina – film, which is light-sensitive. The part of the retina that is most sensitive to light is called the macula. Although the retina is thin, it is structurally complex and divided into 10 layers, and the photoreceptor cells are mainly cones and rods.

Cones are mainly responsible for photopic vision and color vision, while rods are mainly responsible for scotopic vision.

7. Camera obscura

The choroid – the camera's camera obscura.

The lens and aperture of the camera are important factors that affect the shooting effect, and the main functions are as follows:

1.Lens The lens of the camera determines the quality and angle of the imaging, and different lenses have different characteristics and application ranges. For example, a wide-angle lens is suitable for landscapes**, a telephoto lens is suitable for shooting distant objects, and a macro lens is suitable for shooting small objects, etc.

2.Aperture Aperture is the size of the camera's light inlet, and adjusting the aperture size can be envied to control the brightness and darkness of **. A smaller aperture makes the depth of field deeper and more detailed, a medium aperture makes the background blur more prominent, and a larger aperture makes the subject brighter and more prominent.

3.Shutter speed The faster the shutter speed, the more light the camera can capture in a short period of time, and the brighter it appears. The slower the shutter speed, the more light the camera can capture over a longer period of time,** and the darker it appears.

In addition, the shutter speed controls the sharpness of shooting moving objects**.

4.ISO value The ISO value is the number of Sam Guess rolls used to adjust the sensitivity, and the higher its value, the stronger the light sensed by the camera. However, high ISO values can also introduce noise problems, so adjusting ISO values requires a trade-off based on the scene and the desired effect.

To sum up, the camera's lens, aperture and other parameters can have an impact on the imaging effect of **, which needs to be carefully considered and adjusted before shooting.

The main function of the aperture is to adjust the amount of light received by the image sensor, when you turn the aperture wider, then the amount of light entering the camera will be more, and if you adjust the aperture smaller, then the amount of light entering the camera will be less. Let's just remember one law: the larger the aperture, the more light will enter, the brighter it will be, and the smaller the aperture, the less light will enter, and the darker it will be.

It can adjust the amount of light entering the lens, for example: the pupils of domestic kittens are always constricted into a line during the day, and at night, they automatically open into a round hole. Therefore, in the same way, when taking pictures, the light is strong, the aperture should be reduced, and the light is dim, the aperture of the liquid beam should be opened.

In other words, the smaller the f-number of the camera (other parameters remain the same), the better it is for night shooting.

Aperture is the most important factor in determining the size of depth of field, small aperture (large aperture value), depth of field, large aperture (small aperture value), shallow depth of field! For example, if a friend who suffers from myopia is buried, if he does not wear glasses, he always habitually squints his eyes to see things, so that he can often see more clearly, to paraphrase the terminology of photography, which is called:

Stop down the aperture (pupil) and increase the depth of field!