What is aperture, what is depth of field, what is F number, what is a DSLR camera?

Aperture: A device used to control the amount of light that passes through the lens and enters the photosensitive surface of the body, usually within the lens.

Depth of Field: The range of distances from an object measured in front of the camera lens or other sensor on the axis of the sensor that enables a clear image.

F-number: (focal length of the lens and diameter of the lens aperture).

DSLR cameras.

The larger the aperture, the smaller the aperture value and the smaller the depth of field. The smaller the aperture, the greater the f-number and the greater the depth of field.

The smaller the value after f, the larger the aperture, the more light enters, the brighter **, the narrower the focal plane, and the blurred the main background.

The larger the value after f, the smaller the aperture and the less light enters. The picture is darker, and the wider the focal plane, the sharper the front and back of the subject.

The three factors of depth of field: aperture, lens, and distance of the object are important factors that affect depth of field:

1 The larger the aperture (the smaller the aperture f), the shallower the depth of field, and the smaller the aperture (the larger the aperture f), the deeper the depth of field.

2 The longer the focal length of the lens, the shallower the depth of field; Conversely, the deeper the depth of field.

3 The closer the object, the shallower the depth of field; The farther away the object, the deeper the depth of field.

01 Generally speaking, when taking pictures with a DSLR, the larger our aperture, the more blurred the background will be, and the smaller the aperture, the more realistic the background behind us, such as hail, and the more distinct the level.

02 When taking photos with a DSLR, we generally say that the larger the aperture, the smaller the depth of field. The smaller the aperture, the greater the depth of field. So the aperture and depth of field are inversely proportional.

03 When taking a DSLR, if the depth of field is shorter, then the focus that we can see is more on the subject, that is, in the foreground.

04 When taking a DSLR, if the depth of field is getting longer and longer, then we can see that the object in the photo is more layered, and its aperture is smaller.

Depth of field is the "acceptably clear area" before and after a sharp focus in focus. This distance is characterized by the fact that the clear distance behind the solid focus is longer than the sharp distance in front, and for any caliber, the depth of field behind the focal point is about twice as long as the depth of field in front of the focal point.

If the clear range is shorter before and after, it is generally called shallow depth of field (or short depth of field); The clear range is larger, which is generally called the depth of field (or the depth of field is long).

<> What is Aperture and Depth of Field?

Small aperture f8: Dark, clear; Small aperture: Bright, blurry.

1. What is aperture?

A device used to control the amount of light that passes through the lens into the photosensitive surface of the body, usually inside the lens. The aperture is represented by f on the camera, such as f, etc., the larger the value of f, the smaller the aperture, the less light intake, and the darker **; The smaller the value of f, the larger the aperture, the more light intake, and the brighter **. The smaller the f-number of the aperture and the larger the clear aperture, the more light will enter in the same unit of time, and the amount of light entering the upper stage will be exactly twice as much as that of the next stage.

2. What is depth of field?

Depth of field refers to the range of distance between the front and back of the subject that can be imaged at the front of the camera lens or other sensor to obtain a clear image. Here you can understand that the depth of field will have an impact on the bokeh of **, the smaller the depth of field, the less clear parts in the picture, and the better the bokeh effect; The greater the depth of field, the clearer the part of the picture, and the worse the bokeh effect.

3. What are the factors that affect depth of field?

There are three main factors that affect the depth of the field: aperture, focal length, and object distance.

1) The larger the aperture, the smaller the depth of field and blurring; The smaller the aperture, the greater the depth of field and the sharper.

2) The longer the focal length, the smaller the depth of field and the blur; The shorter the focal length, the greater the depth of field and the sharper.

3) The larger the object distance, the greater the depth of field and the clearer; The smaller the object distance, the smaller the depth of field and blur.

4. The relationship between aperture and depth of field.

Aperture is a factor that affects the depth of field, the larger the aperture (the smaller the f-number), the smaller the depth of field, and the better the bokeh effect of **; The smaller the aperture (the larger the f-number), the greater the depth of field, and the worse the bokeh effect of **.

5. How to adjust the depth of field and aperture?

If you want to shoot close-ups, such as close-ups of people, use a large aperture + a small depth of field; If you want to take landscapes, group photos, etc., use a small aperture + large depth of field.

Close-up of the person: maximum aperture value.

Group photo: F11-16

Gourmet still life: F8-11

Landscape shot: f8-11

Flower close-up: Starry sky: Star track: F16-20

6. Aperture summary.

The picture becomes darker: the larger the aperture value f, the smaller the light circumference, the less light enters, and the darker the picture rock.

Brighter picture: The smaller the aperture f, the larger the aperture, and the more light enters, the brighter the picture.

The blurrier: the smaller the aperture f, the larger the aperture. The smaller the depth of field, the smaller the sharpness range.

The sharper: the smaller the aperture f, the smaller the aperture. The greater the depth of field, the greater the sharpness range.

Turning into light: the larger the perimeter value f, the smaller the aperture, the longer the pulse ray, and the light source gradually turns into light.

Becomes a flare: The aperture value f is small, the larger the aperture, the shorter the ray, and the light source gradually turns into a spot.

When you press the shutter on the camera, a hole is opened to allow the sensor to catch the light entering the camera. The aperture value you set affects the size of the hole opening.

The larger the opening, the more light will come in, and the smaller the opening, the less light will enter.

Depth of Field (DOF) refers to the part of the image that is clear before and after the focus plane. The large depth of field means that most of the still lifes are sharp both near and far (e.g. shooting at f 22 aperture is very sharp in the front and back). A small (or shallow) depth of field means that only a portion of the image is clear, and the rest is blurred.

Doodled diagrams, camera objects at the same distance Different apertures, different depths of field.

Generally, it is a large aperture with a small depth of field, and a small aperture with a large depth of field. When the aperture is large, the sharpness range is relatively small, the aperture is small, the range of clarity is relatively large, and the subject can be highlighted with a large aperture, and the front and rear scenes of the image subject can be blurred, only the subject is clear. This method is suitable for shooting close-ups of people, flowers, insects, etc., and when shooting landscape photos, you can use a small aperture to shoot both distant and close scenes clearly.

I don't know if this explanation makes sense.

Depth of field refers to the clear distance between the front and back of the shot.