Detailed explanation of nikkor lens logo nikkor lens logo

Focal length data transmission technology

Indicates the focal length information that the lens can return, which is used for reference of 3D matrix photometry and calculation of TTL flash distance. Although all autofocus lenses have built-in microprocessors, D-lens' processors have more functions. It can provide the distance information between the subject and the camera to the AF camera body, so the camera can use advanced functions such as 3D matrix photometry.

This technology was introduced in 1992 and F90. These lenses adopt a new electronic design, which can provide focal length data for the advanced photometry function of the fuselage. However, it should be noted that when the flash is not used, the focal length data has little effect on photometry.

Representative lens: 28- 105mm f/3.5-4.5D aperture-free control ring AF lens.

A shot that marks Nikon's submission to the mainstream. It has no aperture ring design, and the aperture adjustment is adjusted by the fuselage. This kind of lens can only be used on AF SLR. Although the mechanical size of the bayonet is still the same, the manual body cannot adjust the aperture. This kind of lens was released in 2000. Because the aperture ring is cancelled, the price is lower, and there is no misoperation in theory, because there is no need to manually set the minimum aperture. The early G lens is a continuation of the low-end plastic autofocus lens, aimed at photographers who almost never set the lens manually. But then the advantages of G lens in design began to appear, and Nikon's high-end lens gradually G-shaped.

Representative lenses: AF 28-80mm f/3.3-5.6G, AF-S 70-200mm f/2.8g EDVR automatic indexing shutter, automatic shutter indexing 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's fuselage which supports manual lens, 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.

Representative lens: AI-S 50 mm f/ 1.4 silent wave motor, silent motor.

The lens is equipped with a mute motor, which is equivalent to Canon's USM motor. Its advantages are high focusing speed, full-time manual focusing and quiet focusing. Nikon's SWM is similar to Canon's USM, and autofocus is faster and quieter.

Representative lens: AF-S 28-70mm f/2.8 ED-IF

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 in fisheye lens, wide-angle lens, macro lens and some intermediate lenses, which can improve the imaging quality of near focus. 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.

Representative lens AF 20mm f/2.8d aspheric lens element, aspheric lens assembly.

Even if 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.

Represents the lens af 28-200mm f/3.5-5.6g if-ed internal focusing and 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.

Representative lens af 85 mm f/ 1.4 d if ultra-low dispersion and ultra-low dispersion 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 an optical material with special dispersion characteristics to correct this problem on the telescope head: calcium fluoride (that is, fluorite used by Canon). These materials are not only very fragile, but also very sensitive to temperature changes, so the refractive index of the lens will deviate and the focusing will be seriously affected. Nikon ED lens provides the required benefits without the disadvantages of calcium fluoride glass, thus ensuring the excellent optical performance of the lens.

Representative lens: AF 80-200mm f/2.8ED vibration reduction and anti-shake.

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 newer Nikon cameras.

Representative lens: AF 80-400 mm f/4.5-5.6 ED VR defocus-image control, 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.

Representative lens: AFDC 105 mm f/2 D rear focusing and rear 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.

Representative lens: 85mm f/ 1.8D AF is specially 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.

Wide-angle AF-S DX 12-24 mm f/4g IF-ED represents the nanocrystalline coating for lens zoom.

The logo of some of Nikon's improved lenses is usually just a transition from no D version to D version.

Representative lens AF 80-200mm f/2.8D ED (third generation small steel gun)

P lens: built-in CPU lens

Built-in focusing motor in the fuselage is a strategy of "changing with the constant", but it is difficult for the fuselage motor to drive the huge telescopic automatic lens, which makes Nikon's new fuselage unable to use the telescope head efficiently. 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 the P lens looks the same as the AI-S lens, these lenses all have the chip and most performance of the AF lens.

Representative lens: 45mm f/2.8 P means that this lens is a macro mirror or has a macro function.

Representative lens: af micro 70-180 mm f/4.5-5.6 ed axis shift lens.

A lens that moves the optical axis to adjust the viewing angle. Mostly used in architectural photography. 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. Automatic and manual focus-free switching

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. Slim and frivolous

Nikon's logo with some thin lenses.

Representative lens AIS 50/ 1.8S