SLR, what lens can be used to shoot the front portrait blurred, the back portrait clear, or vice ver

Autofocus still captures the effect of shallow depth of field. However, the focus should be selected in the right position, and of course the accuracy of manual focus is higher. (It's also up to you.) ）

The choice of lens is, of course, to have a large aperture and a long focal length. Personally, I feel that the maximum aperture should not be smaller, and it is best to achieve it with a fixed focal length lens. The zoom head should ideally be reached.

The focal length of the lens cannot be less than 50 mm. Generally 85 mm or 70-75 mm is the most practical. Long guns like 200 mm are not very convenient, but they work well.

In short: if the maximum aperture of the lens is large, it doesn't matter if the focal length is shorter. If the maximum aperture of the lens is small, it can only be a long focal length.

When shooting such a portrait effect, the focus should be on the eyes of the person in front of you, while pulling the focus as far as possible (the prime head is not necessary, the focal length is dead). If it is a zoom head, the focal length should be pulled to the telephoto. The aperture should also be opened to the maximum as much as possible.

Generally, the maximum aperture value is marked on the lens. And, of course, accurate metering. And it's better not to use a flash, otherwise the person in front of you will die white.

The people in the back were pitch black. There are no levels. One last note:

Only manual or aperture priority modes can be used.

This effect is due to the sensitive focal length, and it is easy to shoot this effect with a DSLR camera, or with Fujifilm telephoto cameras.

Manual focusing, yours is not a fool machine!

To achieve such a result, one of the following conditions must be met.

1.The lens aperture should be larger than that.

2.The focal length of the lens should be more than 80mm long.

This effect is called the depth of field effect. Using a DSLR camera to adjust the aperture, focal length, etc., can achieve a change in depth of field. Here are the factors that adjust the depth of field:

There are three main factors that determine depth of field:

1. Aperture When the focal length of the lens is the same and the shooting distance is the same, the smaller the aperture, the larger the range of depth of field; The larger the aperture, the smaller the range of depth of field. This is because the smaller the aperture, the thinner the beam entering the lens, the more pronounced the paraxial effect, and the smaller the angle at which the rays converge. In this way, the light that converges in front of and behind the imaging will leave a smaller spot on the imaging surface, so that the unclear scenery that is originally closer and farther away from the lens has acceptable clarity.

2. Focal length When the aperture coefficient and shooting distance are the same, the shorter the focal length of the lens, the larger the depth of field range; The longer the focal point of the lens, the smaller the depth-of-field range. This is because a lens with a short focal length has a much narrower band of focus (depth of focus) for light coming from a scene at different distances in front and behind than a lens with a longer focal length, so more flare enters the acceptable area of sharpness.

3. Object distance: When the focal length and aperture coefficient of the lens are equal, the farther the object distance, the larger the depth of field range; The closer the object distance, the smaller the depth of field range. This is because objects away from the camera can be sharply focused with very little adjustment, and the focus of the front and rear scenes is tightly focused. This allows more flare to enter the acceptable area of sharpness, so the depth of field increases.

Conversely, focusing on a scene close to the lens reduces the spot that enters the acceptable area of clarity and reduces the depth of field due to the widening of the interval between the front and rear knot focal points, i.e., the depth of focus is expanded. For this reason, the foreground depth of the lens is always less than the rear depth of field.

Hello. The following factors can enhance the effect of this character highlighting and background blur:

1. Increase the focal length of the lens, for example, using 55mm is more obvious than 18mm;

2. Increase the aperture value of the lens, for example, f 4 is more obvious than f 11;

3. Reduce the distance between the person being photographed and the camera, the closer the effect, the more obvious;

4. Increase the distance between the person being photographed and the background, the farther away the effect is more obvious.

All of these factors have the effect of increasing the degree of bokeh, which can be used individually or superimposedly, and when all of them are used, the maximum bokeh effect that can be achieved by a certain camera and matching lens can be achieved.

Hope it helps.

The background is blurred, and the characters stand out by focusing and depth of field.

Depth of field refers to the distance between the front and back of the subject after the subject is solidified. Out of the depth of field, the image is virtual.

Focusing refers to making the subject clear.

If you want to shoot the main body with a real subject and a virtual background, you must first reduce the depth of field by focusing on the character, and then you can do it.

The specific steps are as follows:

1. Focus on the characters.

2. Reduce the depth of field.

You can use "telephoto focal length" and "wide aperture" to reduce the depth of field.

Place the lens on the telephoto focal length and frame it by changing the object distance.

If the depth of field is not small enough, increase the aperture to reduce the depth of field.

Only until the background is blurred enough.

In this way, you can shoot the ** with the background blurred and the subject prominent.

To blur the background, three conditions are required, 1 large aperture, the aperture is preferably above, 2 is the longer the lens focal length, the more blur, 3 is the closer the camera is to the subject, and the farther the subject is from the background, the better the blur.

The background is blurred, and the characters stand out by focusing and depth of field.

Depth of field refers to the distance between the front and back of the subject after the main defense is solid. Out of the depth of field, the image is virtual.

Focusing refers to making the subject clear.

If you want to shoot the main body with a real subject and a virtual background, you must first reduce the focus on the characters with a high depth of field, and then you can do it.

The specific steps are as follows:

1. Focus on the characters.

2. Reduce the depth of field.

You can use "telephoto focal length" and "wide aperture" to reduce the depth of field.

Place the lens on the telephoto focal length and frame it by changing the object distance.

If the depth of field is not small enough, increase the aperture to reduce the depth of field.

Only until the background is blurred enough.

In this way, you can shoot the ** with the background blurred and the subject prominent.

Who said that the point-and-shoot machine can't zoom ......My 900-yuan Minolta is a 35-70 zoom head ......Of course, there are some that can't, if the landlord's camera has a W-T button, then you can zoom ......

The point-and-shoot machine is not out of focus, but autofocus in a small area. The sofa is talking about the lomo camera ......And now the Lomo camera can also change the lens......

The point-and-shoot machine is characterized by full automation, which is actually very similar to the current cheap card machine. The lens of the point-and-shoot machine also has an adjustable aperture and shutter, but you can't see or touch it, only the camera automatically adjusts it for you to be correct**, and its variable range is small, compared to the professional camera point-and-shoot machine may only have a pitiful few gears, but it is still a sparrow, although it is small.

The point-and-shoot lens usually adopts the basic lens structure of the manufacturer's more mature technology, the structure is simple, the lens and lens group are few but the imaging is excellent, the color is bright but most of the imaging is not too sharp (the edge of the object is sharp and clear), but it is just a sleeve quality in the 135 SLR system, which is a cost-effective entry-level mediocre product.

**It looks clear because of the high resolution of the film itself, but it does not mean that the sharpness is high, magnified to the common size of the current digital camera does not lose the film machine, only when the magnification is more than 10 inches before the difference begins, but the general film machine shoots** can not afford to zoom in.

Therefore, the landlord does not have to be entangled in this, the development of digital cameras has gradually begun to surpass film today, and the mature system of film is also very vigorous, and the landlord uses other digital or film cameras, you will find that its practicality is very clear and ......

A point-and-shoot camera is also a camera, well, as long as it is a camera, shooting a clear ** is the basic requirement.

Point-and-shoot cameras just can't zoom, can't change the aperture shutter, can't focus. Everything is fixed, aim and shine.

There is definitely no good effect, but clarity is basically guaranteed. Because what he does is a large depth of field, and he can illuminate it clearly under basic circumstances.

Because most of the point-and-shoot cameras use fixed-focus lenses, and the area of the film film is relatively large, more than ten times that of the digital DC, the image clarity after magnification is much higher than that of the small DC

SLR - is the abbreviation of single-lens reflex, SLR camera is single-lens reflex camera, the English abbreviation is SLR (single lens reflex), the technology is in front of the film plane at a 45 ° angle to install a reflector, the top of the mirror in turn there is ground glass, pentaprism eyepiece, etc., the pentaprism will be the real image light reflection many times to change the optical path, the image is sent to the eyepiece, so that the image seen in the viewing window and the film will always be the same, It also makes the framing range basically the same as the actual shooting range. The unique design of this prism allows the photographer to observe the image passing through the lens directly from the viewfinder. They are generally designed to be interchangeable.

Corresponding to it, there is also a dual-lens reflex camera, one lens of the dual lens is used for shooting, and the other lens is used for framing, also called waist level framing, and the image seen is reversed on the left and right.

You're right, most DSLR cameras have a very thick body, hehe, here are some definitions of SLR, you can learn about it.

SLR refers to Single Lens Reflex, or SLR (Single Lens Reflex), which is the most popular framing system today. In this system, the unique design of the mirrors and prisms allows the photographer to observe the image passing through the lens directly from the viewfinder. As can be seen in the construction diagram of a single-head reflex camera, the light passing through the lens reaches the mirror, is refracted to the upper focusing screen and forms an image, and through the eyepiece and pentaprism, we can see the outside scene through the viewing window.

When shooting, when the shutter button is pressed, the mirror pops up, and the shutter curtain in front of the film opens at the same time, and the light (image) through the lens is projected onto the film to make the film sensitive, and then the mirror immediately returns to its original state, and the image can be seen in the viewing window again. This structure of the single-lens reflex camera determines that it is completely shot through the lens focus, it can make the image seen in the viewing window and the film forever the same, its framing range is basically the same as the actual shooting range, eliminating the parallax phenomenon of the rangefinder head-up framing camera, from the perspective of learning photography, it is very conducive to intuitive framing and composition.

There is no parallax.

Since the entire imaging system (focusing and shooting) is a single lens, there is no parallax, which means that framing and imaging are the same. (Traditional cameras are mostly rangefinder viewing) Secondly, because an imaging system is used as a lens, the coordinated response is faster than that of ordinary machines, so the SLR camera is better for shooting objects moving at high speed (will not miss the good scene because of the slow response of the camera) Thirdly, the SLR machine uses different photographic systems due to the use of changing lenses, such as you can change the wide-angle lens, you can extend the lens, you can also add color films, you can also choose micro-distance lenses, etc., to meet your different needs. You won't miss out on the view because of the limited lens of the camera.

It is easy to distinguish a SLR from the naked eye, the size of the SLR is generally slightly larger, and the lens can be detached, in addition, it can also be distinguished from the following aspects:

1. Distinguish from the brand:

Now the SLR cameras on the market are the following 6 brands, Canon, Nikon, Sony, Pentax, Olympus, Samsung, among which the majority of consumers use Canon, Nikon and Sony SLR, such as Fujifilm does not have SLR models;

2. Identification in naming and appearance

A, Canon's SLR model is mainly named after the number + D (letters), such as 7D, 5DMark II, 1100D, etc., the upper left corner of the fuselage will be printed with the EOS logo, and the model of the machine is printed below this logo, B. Nikon's SLR model is mainly named after D+ numbers (letters), such as D90, D80, D300S, etc., there is no EOS logo in the upper left corner of the fuselage, only the machine model is printed, and there is a red circle logo at the handle of the right hand, C, Sony's SLR model is @+Digitally named, such as @33, @55, @390等, there is a big orange @ logo in the upper left corner of the fuselage, the machine model is printed next to the right-hand handle, d, Pentax's SLR model is named after K+ numbers or letters, such as K-7, K200, KX, etc., the machine model is printed in the upper left corner of the fuselage, E, Olympus SLR model is named after E+ numbers or letters, such as E-P2, E-620SLK, etc., E-P series is a miniature SLR series, the body is small, the lens can be detached, Very distinctive, the model model of the E-P series is printed next to the boot button, and the machine model of other models is printed in the upper left corner of the fuselage, F, Samsung's SLR model is named after GX+ numbers or letters, such as GX-20, GX-1S, GX-30, etc., and the machine model is printed in the upper left corner of the fuselage;

There are some brands of telephoto machines and SLR machines that are very similar in appearance, but they are not SLR cameras, the landlord pays attention to the above points, it is easy to distinguish the SLR camera, and there is nothing unclear, you can contact Wangwang: colorful Yunxiang, I wish you happiness.