Does the English logo of Nikon lens mean explanation?

D: Remote focusing and remote data transmission technology

Indicates the focal length information that the lens can return, which is used as a reference for 3D matrix photometry and TTL flash distance calculation. All autofocus cameras have built-in microcomputers, but microcomputers with D lenses have more functions. The special feature of these lenses is that they can provide information about the distance between the subject and the camera to the body of AF Nikon camera, so they can realize advanced functions such as 3D matrix photometry and 3D multi-sensor balanced supplementary flash.

1992 goes on the market with F90. These lenses adopt brand-new electronic design, which can provide focal length data for the advanced photometry function of the fuselage. The distance data enables the fuselage to calculate the flash index, thus improving flash photography. For non-flash shooting, the distance data has little effect on photometry.

G: lens without aperture control ring

For Nikon's F-mount lens, but there is no aperture ring, the aperture adjustment must be adjusted by the body. Since Nikon produced the G-series lens without the aperture adjustment ring, fundamental changes have taken place, because this lens can only be used on AF SLR. Although the mechanical size of the bayonet is still the same, the G-series lens is used on MF SLR, and the aperture cannot be adjusted.

In 2000, Nikon released the first G series lens. This lightweight and cheap lens cancels the aperture adjustment ring, and the aperture can only be set manually or preferentially through the body. G-type nikkor lens is easy to operate, and there will be no misoperation in theory, because there is no need to manually set the minimum aperture. This is a continuation of the plastic autofocus lens, which is suitable for photographers who almost never set the lens manually.

AI-S: Automatic Indexing Shutter Automatic Shutter Index Transfer Technology

198 1, Nikon has modified the entire AI lens mount to make it fully compatible with the FA high-speed program exposure mode that will be put into use soon. These modified new lenses are AI-S mount nikkor lenses. According to the minimum orange aperture number on the lens aperture ring and aperture direct reading ring, and the grinding groove on the blade bayonet, it is very easy to identify.

When AI-S lens is used in Nikon FA fuselage, it can provide information to the fuselage according to its focal length to select normal program or high-speed program. When the shutter speed takes precedence over the automatic exposure mode, they can provide consistent exposure control in a very wide illumination range.

Af-s: silent wave motor.

The lens is equipped with a silent motor, which is equivalent to Canon's ultrasonic motor, and can provide energy for optical focusing through "traveling wave". Its advantages are high focusing speed and full-time manual focusing, but its disadvantages are light weight and low price. Nikon's SWM is similar to Canon's USM, and autofocus is faster and quieter.

CRC: close-range correction

It is a barrel-shaped correction structure of wide-angle lens, which can provide high-quality pictures when focusing at close range and increasing the focusing range, and each lens group will move independently when focusing, thus ensuring the lens performance when shooting at close range. CRC system is mainly used for fisheye lens, wide-angle lens, macro lens and some intermediate lenses.

The image quality of close focus can be improved. The lens assembly is configured as a "floating assembly" design, in which each lens group can move independently for focusing. This ensures the best performance of the lens even when shooting at close range.

ASP: a spherical lens element aspheric lens assembly

Even when the aspheric lens uses the maximum aperture, it can still minimize the comet aberration and other lens aberrations. This is especially useful for correcting the distortion of wide-angle lens, and can make the lens assembly more lightweight and exquisite in design by reducing the necessary standard components.

Nikon uses three kinds of aspheric lenses: precision grinding aspheric lenses is the most elaborate lens manufacturing process to meet extremely strict production standards, and this kind of lens is unique in large aperture wide-angle lenses. Hybrid lens is molded on optical glass with special plastic, which is used for standard Nicole zoom lens. Molded glass aspheric lens is made of unique optical glass by special metal casting technology.

If: internal focusing internal focusing technology

The so-called internal focusing means that when the lens is focused, the front and rear lenses do not move, but a focusing lens group inside the lens floats to complete the focusing, and the lens length remains unchanged when focusing. The adoption of intermediate frequency technology makes it possible to focus quickly and quietly.

The structure of the lens is simplified, thus greatly reducing the volume and weight of the lens. Even some telephoto lenses may be hand-shot, which makes focusing faster and easier. The internal focusing system can also shorten the recent shooting distance of the lens and improve the imaging quality of the telephoto lens at close range.

Ed: ultra-low dispersion super background lens

It shows that this lens contains ED lens, which is an ultra-low dispersion lens, so that the lens is sharp, color difference can be reduced for color correction, and the image will not have dispersion. Dispersion: Simply speaking, it refers to the dispersion of images and colors produced when light with different wavelengths passes through optical glass.

In the past, it was necessary to use optical materials with special dispersion characteristics, especially fluoride, to correct this problem on the telescope head, which was not only very fragile, but also very sensitive to temperature changes, which led to the deviation of the refractive index of the lens and seriously affected the focusing. It provides the required benefits without the disadvantages of calcium fluoride glass, thus ensuring the excellent optical performance of the lens.

Vr: electronic damping system for vibration reduction

An optical technology that can improve the image blur caused by camera vibration, and can shoot quickly when the shutter speed is reduced by three levels, so that the telephoto lens can take clear photos. When the photographer shoots a moving object, the system even automatically detects the movement of the camera. VR operation can only be performed on individual Nikon cameras.

Dc: defocus-image control DC: defocus-image control

Nikon original lens can provide unique defocus image control function. There is an out-of-focus positioning rotating ring at the front end of the lens. The aperture values on the ring range from F2 to F5.6***4, which are marked on the left and right of the ring respectively, and are denoted by R and F. ..

This is a special fixed-focus lens, its biggest feature is that it allows fuzzy control of the background or foreground of a specific subject to obtain the best out-of-focus imaging, which is very valuable when shooting portraits, and it can also help us control all parts of the photo according to what we want to express, which is incomparable to similar lenses of other manufacturers.

Rf: back focusing and back group focusing technology

For the rear focus lens, with the lens of the rear focus system, all lenses will be divided into several specific lens groups, and only the rear lens group will move to focus. Different from IF, when the RF lens focuses, the rear lens group will move, but the lens length will not change.

DX: Designed for Nikon DSLR.

A lens specially designed for Nikon SLR digital camera. This kind of lens can cover the imaging sensor more effectively with a smaller imaging ring, and the imaging is smaller than that of a 35mm film, so it is generally not recommended to use a full-film model, such as a traditional camera.

New new type

Some signs of Nikon's improved lens.

P-lens:

Built-in CPU lens

The built-in focus motor in the fuselage is a strategy of "changing with the constant", but this strategy is not very effective for the huge telescopic automatic lens, resulting in Nikon's new fuselage can not make efficient use of the telescope head. 1998, Nikon released a manual focusing telephoto lens with built-in CPU, which meets the advanced automatic exposure function of AF fuselage and partially solves this problem. Although P-type lenses look the same as AI-S lenses, these lenses have the electronics and most of the performance of AF lenses.

Macro:

Explain that this lens is a macro mirror or has a macro function.

TC: remote converter rangefinder

PC-Shift: moving lens

A lens that moves the optical axis to adjust the viewing angle. Mostly used in architectural photography.

SIC: super integrated coating super composite coating

In order to minimize ghosts and light spots, reduce light reflection in a longer wavelength range, and play an excellent color balance and reduction.

M/A: Automatic and manual focusing can be switched freely.

AF-S Nicole has Nikon's unique M/A mode, which can make autofocus into manual focusing operation without any time delay-even in AF servo operation and any AF mode.

S: slim is light and thin.

Nikon's logo with some thin lenses.