Why do you want to lengthen the image distance when you take a close-up with a camera?

First of all, let me explain six methods of shooting close-range, also called six methods of close-range. Just because your image distance is long doesn't mean that the close-up is certain.

Come, but a special effect of the sixth method.

Close-ups and remakes, one of photography techniques, are sometimes encountered. Be prepared in theory and equipment so as not to be at a loss. Although close-up photography is also photography, it has its own unique method, which is unusual for taking pictures. I'm not proficient, just a little research.

Throughout the close-up methods, can be roughly divided into the following six:

1. Close-up telescopic leather cavity method: This is a professional close-up and remake method. The subject and the lens can be kept vertical, the lens moves through the slide rail, and the viewing range can be adjusted at will, so it is not easy to produce relative movement and is relatively stable. The disadvantage is that the operation is complicated, it is not easy to avoid reflection under natural light conditions, and the light angle is not easy to find.

2. Close-range connection mode: This mode uses the method of increasing the image distance to achieve the purpose of magnifying the object image similar to the rangefinder. The optical principle is the same as the first method, but the image distance is fixed, which is different from the telescopic leather cavity. There is also the matching between the camera and lens and the connecting cavity, whether it is PK port, MD port or YC port. , should be considered, and increase or decrease the connecting cavity according to the size of the subject.

3. Close-up method: This method adds a convex lens in front of the camera to enlarge the scene. There are also three pieces in the market (generally+1, +2, +4), and two pieces can be used, but more than two pieces will produce radial deformation. Prices range from tens of yuan to four or five hundred yuan. If the requirements are not high, you can use reading glasses instead. This is a more convenient and traditional close-up method. The disadvantage is that the lens is not easy to keep clean and easy to fall off and break.

4. How to use the macro lens: With the progress of science and technology, lenses with macro photography function are becoming more and more common. Some lenses with large focal length range also have close-up function, and even "full-range macro" lenses that can take close-up shots at any focal length position have appeared. A lens can not only show the macro scenery, but also show the micro world, which brings great convenience to photographers. However, the single performance and frequent use of compatible devices need to be considered.

Fifth, the lens reverse installation method: The ideal close-up effect can be obtained by using the lens reverse installation of the reverse connection ring, and the 50MM lens reverse installation is very suitable for shooting flowers, butterflies and other objects similar to the size of 3-inch photos. In the absence of reverse connection ring and other means, the lens can be reversed in front of the lens to achieve close-up, generally without light leakage, but attention should be paid to making the lens and interface "coaxial" as much as possible. The anti-focus of the lens is mainly realized by adjusting the object distance.

6. Far-distance shooting method: This is a close-range shooting method using the forgetting function of telephoto lens, which can place the subject outside the nearest allowable focusing distance. The method and characteristics are basically the same as those of normal telephoto lenses.

It should be noted that no matter which method is used, the depth of field is pitifully small, sometimes as thin as paper. When focusing, gradually narrow the scope and finally find the clearest point. The framing range is also related to the grade of the camera. The framing of cheap cameras is not accurate, and the scenery reflected on the negative is often too large and easy to "wear". Except for cameras with built-in metering, their exposure is different from normal photography according to different methods. Pay attention to the stability of the camera. It is best to use a stable bracket and cable releaser. Self-timer delay function can be used without cable release. In addition, when remaking the photos of cotton wool paper, in previous books, there are methods to introduce the photos, such as soaking them in water and sticking them on the glass, coating vaseline under the glass and putting them in water. Experience shows that exposure compensation should be increased when taking high-profile photos and decreased when taking low-profile photos, which is the same as shooting snow scenes. The exposure compensation for remaking Gao Fancha photos should be reduced appropriately, and the exposure compensation for remaking low-contrast photos should be increased appropriately. Pay attention to the reflection of the subject, avoid direct light, stay away from strong reflective objects such as electroplated metal objects, and photographers should wear dark clothes.

Close-up photography in a small area can be described as a miracle in the mirror. There are interesting things to capture in works of art, such as old photos, flowers, cracks and tree trunks. In the photography family, close-up photography is a practical technique and a unique style.