What does Nikon lens letter mean?

It can be divided into three types: AF, AF-I and AF-S. AF stands for this lens to support body-driven autofocus. AF-I stands for the built-in focus motor of this lens; AF-S, that is to say, this lens has a built-in SWM (noise reduction waveform motor mute? Wave? Auto-focusing lens of motor (commonly known as ultrasonic motor).

2. Image quality mark

AS is an aspherical lens in the traditional sense, while CRC refers to the floating lens group for close-range photography, ED(Super? ED) refers to low dispersion lens, HRI refers to high refractive index lens, and FL refers to fluorite lens. These designs can actually be reflected in the picture quality.

3. Aperture form

No symbol or D symbol indicates that there is an aperture ring, G indicates that there is no aperture ring but a mechanical aperture is used, E indicates an electromagnetic aperture, r D indicates a circular aperture, and DC indicates a double aperture design. In addition, all D, G and E lenses can provide additional photometric information for the flash.

4. Lens technology and lens materials used.

ED in the lens name means that the lens has ED (ultra-low dispersion) lenses, which can greatly reduce the dispersion caused by the prism. At the same time, Nikon also has AF-S Nicol 80-400mm super ED lens? f/4.5-5.6G？ Ed. VR and AF-S nikel 200mm? f/2G？ Ed. VR？ These two shots.

In addition, it will also indicate the focusing method used by the lens. The lens marked with the word IF uses Inner? Focusing (internal focus), the lens length will not change when the lens is focused, which is very important for lens sealing design.

5. The meaning of other letters

The lens is distinguished by DX and FX on the corresponding frame of the fuselage. DX is suitable for Nikon APS-C format camera and FX is suitable for Nikon full-frame camera. Whether the lens is anti-shake is usually marked by VR, is it vibration? Zooming out means that the lens has anti-shake function.

Some of Nikon's lenses are marked with PF, which means that the lenses adopt Fresnel phase lenses. The chromatic aberration can be effectively compensated by using the diffraction phenomenon of light, and at the same time, the number of lenses can be reduced and the lens volume can be reduced.

Zhongguancun Online-Camera Encyclopedia What do the letters on the lens stand for?

Zhongguancun Online —— How to understand the name of the lens by reading Introduction to Photography?