What is a telephoto lens and what is a macro lens?

Telephoto lens:

1. Definition:

Telephoto lens refers to a photography lens that has a focal length longer than a standard lens.

Telephoto lenses are divided into two categories: ordinary telephoto lenses and super telephoto lenses. The focal length of an ordinary telephoto lens is close to that of a standard lens, while the focal length of a super telephoto lens is much longer than that of a standard lens.

Take the 135 camera as an example. The photography lenses with focal lengths from 85 mm to 300 mm are ordinary telephoto lenses, and those with focal lengths above 300 mm are super telephoto lenses.

2. Purpose:

The telephoto lens has a long focal length, a small viewing angle, and a large image on the film. Therefore, it can capture a larger image than a standard lens at the same distance. Suitable for shooting distant subjects. Because its depth of field range is smaller than that of a standard lens, it can blur the background more effectively and highlight the subject in focus. Moreover, the subject is generally far away from the camera, resulting in less distortion in the perspective of the portrait, making the portrait more vivid. , so people often refer to telephoto lenses as portrait lenses. However, telephoto lenses have longer barrels, are heavier, are relatively more expensive, and have a relatively small depth of field, making it difficult to focus in actual use, so they are often used in professional photography.

Macro lens:

1. Definition:

A macro lens is a special lens used for macro photography, mainly used for shooting very small details. Objects such as flowers and insects. In order to correctly focus on extremely close subjects, macro lenses are usually designed to be stretched longer to keep the optical center as far away from the photosensitive element as possible. At the same time, the design of the lens set must also focus on Control of deformation and chromatic aberration at close range. The focal length of most macro lenses is larger than that of standard lenses and can be classified as telephoto lenses. However, the optical design may not be as good as that of ordinary telephoto lenses, so they are not completely suitable for general photography.

2. Purpose:

Macro lenses are originally designed to take and copy flat objects (documents, photos, paintings, etc.), and naturally have certain requirements for the lens. High image reproduction capabilities and perfect reproduction levels. The biggest feature of a macro lens is that the imaging surface of the lens is a flat image field when taking close-up shots, instead of showing a curvature of field like the bottom of a pot like a commonly used lens. This design is to achieve consistent image quality in the center and edges of the photo when reproducing items such as documents and paintings. Using a macro lens to shoot small natural scenes will give people a wonderful visual experience. That is because of the microscopic scenes that people generally cannot see, coupled with the high-definition images that the macro lens itself can obtain. The texture reproduction will also give people a kind of image shock.

The macro lens is a special photography lens with a wide range of uses. This lens is used for copying documents, scientific exploration, and artistic creation. There are more and more varieties of macro lenses, which provide more convenience for our macro photography activities. Commonly used macro lenses for 135mm cameras include several different specifications such as 50mm, 55mm, 60mm, 85mm, 90mm, 100mm, 105mm, 125mm, 180mm, 200mm, etc. Macro lenses of different specifications have different uses. For example, a 50mm to 60mm lens can shoot an A4-sized document on a general photoshooting table, but if we switch to a 200mm macro lens to shoot under the same conditions, the camera must be farther away from the document. Very far, small remake stations are unable to meet this requirement. And if you want to use a macro lens to take a close-up photo of an insect without disturbing the insect too much, a macro lens with a long focal length is the best choice.