Detailed explanation of SLR lens parameters The significance of SLR lens identification

For photographers, it is necessary to have a SLR camera, which can take very beautiful photos. So for some novice photographers, they don't know much about SLR lenses and know nothing about the parameters of SLR lenses. Then this article will explain the parameters of SLR lens in detail, so that everyone can understand the significance of SLR lens logo.

Detailed explanation of SLR lens parameters I: introduction of SLR lens

Lens properties: usually displayed by AF and EF, AF is AK bayonet, EF is EF bayonet, and some other kinds of logos are included.

Focal length parameter: Usually there is a focal length value or zoom range on the lens, in millimeters.

Aperture parameter: The aperture coefficient of a lens, such as F2.8, indicates that its maximum aperture is 2.8, and some lenses also display the minimum aperture.

Features: Other technical features adopted by the lens, etc.

Detailed explanation of SLR lens parameters II: introduction of focal length

The focal lengths of 1 and 10 mm are super wide-angle focal lengths, which are mainly used for shooting natural scenery and natural documentaries. The shooting angle is relatively large, which has a great influence on the viewing angle.

The focal length of about 2.24 mm is a wide-angle focal length, which is mainly used to shoot scenery documentaries and is more suitable for tourism shooting.

The focal length of about 3.50 mm is the standard focal length, which is most in line with the perspective of human body, and is mainly suitable for tourism shooting and character shooting in scenic spots.

The focal length of about 4.85 mm is a kind of focal length, which is mainly used to shoot still images of people.

The focal length of about 5.200mm is telephoto, which is mainly used for snapshots and close-ups.

The focal length of about 6.500mm is a long focal length, which is very suitable for shooting sports events and dynamic snapshots.

Detailed explanation of SLR lens parameters III: logo meaning of each brand lens

First, Canon Canon

1, AL: stands for aspheric lens, indicating that this lens is not designed with spherical lens.

2.DO: diffractive optics, which means that the lens is equipped with multilayer diffractive optical lenses, which is the standard of high-end lenses.

3.EF: Electronic bayonet, which is an autofocus lens commonly used in Canon cameras.

4.EF-S: stands for the electronic bayonet for digital SLR in APS format.

5.EMD: stands for electromagnetic aperture. With this technology, the lens can be electronically controlled to open and close the aperture.

6.UD: this means that the lens uses glass lenses.

7.USM: ultrasonic motor, with the lens of USM technology, can realize silent and fast response focusing.

Second, Nikon Nikon

1, AF: electronic bayonet, autofocus lens for Nikon.

2. Auto focus motor.

3.ASP: aspherical lens, which means the same as Canon's al.

4.CRC: short-range error correction system.

5.DX: DX series lens. This lens is an APS frame lens specially produced by Nikon for DSLR, and cannot be used on Quan Huafu models.

6.ED: ultra-low dispersion lens.

7.IF: internal focusing function.