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Pentax:

A: A series manual focusing lens.

AF/MF: manual/autofocus switching.

Aluminum: aspherical lens.

CF macro: continue to focus on macro macro.

DA: DA lens is a special digital lens designed by Pentax for digital SLR cameras with APS-C format. It is marked with a green circle and cannot be used on Quan Huafu models.

Ed: ultra-low dispersion ultra-low dispersion lens.

F: Pentax's early autofocus lens mount.

FA: It is also Pentax's AF lens mount, which has two more electronic contacts than F mount.

If: interfocus internal focusing.

Limited edition: Limited edition lens is also Pentax high-performance and high-grade lens.

M: m series manual focusing lens.

Meter (abbreviation for meter)) Minimum object distance closest focal length.

PowerZoom: electric zoom.

SMC:Super Mluti coating super multi-layer coating, Pentax unique lens coating technology, strong anti-glare ability.

Soft focus: soft focus lens

*: * Mirror is Pentax's advanced professional lens, just like Canon's L-head, commonly known as star mirror.

Examples show that the FA* 80-200 F2.8 ED lens represents Pentax professional star lens, with a focal length of 80-200mm, a constant maximum aperture of F2.8 and an ED ultra-low dispersion lens. FA3 1mm F 1.8al limited lens represents a limited edition lens, with a fixed focus of 3 1mm and an aperture of F 1.8, and an aspheric lens is adopted.

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Each brand's English alphabet logo is different:

The meaning of lens logo

Nikon article:

AI: automatic indexing and automatic maximum aperture transfer technology

Representative lens: Nicole AI 50/ 1.4

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

Representative lens: Nicole AIS 50/ 1.4

AF-S: silent wave motor.

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

D-lens: Long-distance focusing and long-distance data transmission technology

Indicates that the lens can return the focal length information to 3D (brightness, contrast and distance of the scene).

Photometric reference and control of TTL balanced flash lamp. Introduced in 1992.

Representative lens: 28-105 mm f/3.5-4.5d af zoom-nikkor.

CRC: Close-up correction

Adopt floating lens design to ensure that the optical quality will not decrease during close-up. For example, if AIS 24/2.8 and AF 85/ 1.4D all adopt CRC technology.

DC: defocused image control defocused image control

At present, Nikon has only two DC lenses: AF DC 105mm f/2D and AF DC 135mm f/2D.

ED: ultra-low dispersion super background lens

It means that this lens contains ED lens, which minimizes the chromatic aberration of the lens, thus ensuring the excellent optical performance of the lens.

Representative lens: 80-200mm f/2.8D ED AF Zoom-Nicole

G lens

Unlike D-lens, this lens has no aperture ring design, aperture adjustment must be completed by the body, and it also supports 3D matrix metering. This design reduces the weight and production cost of the lens. This lens is fully compatible with F5, F 100, F80, F65, F60, F55, F50, F40 1, PRONEA, D 1. For F4, F90, F70, F80 1 and F. are not compatible with the rest of the fuselage. G-type nikkor lens is easier 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. Now Nikon has the trend of popularizing G-heads.

Representative lens: 28-80mm f/3.3-5.6G AF Zoom-Nicole

IF: internal focusing internal focusing technology

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

Representative lens: 85mm f/ 1.4D IF AF Nicole.

IX lens

1996 Nikon released a cheap and compact lens for the APS camera Pronea. The characteristics are the same as plastic AF-D lens. Unable to adapt to non-APS fuselage. The space reserved for the reflector is reduced, which means that this lens is not used for 35mm cameras, and the image field is too small to cover 35mm film. But the standard AF lens can be used for APS cameras.

Microscopic, domain-specific

Explain that this lens is a macro lens or has the function of macro shooting.

Representative lens: 105mm f/2.8d AF mini Nicole

New new type

Nikon has improved the logo of some lenses, such as the famous AF 80-200/2.8ED (N).

Not applicable: full-time manual focusing

Just like Canon's FTM.

P-lens: built-in CPU mirror

P-type lenses look the same as AI-S lenses, but these lenses have the electronics and most of the performance of AF lenses.

At present, there are only three types of P-type lenses: 500/4 IF-ED,1200-1700/5.6-8 IF-ED and 45/2.8.

PC-Shift: moving lens

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

RF: back focusing and back group focusing technology

Unlike if, the RF lens is focused by the rear lens group. Because the rear lens group is smaller than the front lens group, it is easy to drive, ensuring faster focusing speed and the same lens length. Radio frequency also helps to improve the imaging quality.

Representative lens: 85mm f/ 1.8D AF Nikkor

S:Slim is light and thin.

Nikon signed some thin lenses, such as AIS 50/1.8s.

SIC: super integrated coating super composite coating

TC: remote converter rangefinder

VR: electronic damping system for vibration reduction

The code name of Nikon anti-shake lens can be used for hand-held photography to increase the stability of the picture at low shutter speed. The bodies that can support VR are F5, F 100, F80, F65, D 1, D 100. The rest of the fuselage can use the lens but does not support VR function.

Representative lens: 80-400 mm f/4.5-5.6 ed VR AF zoom-Nicole

Canon:

AFD: arc-driven arc motor

Arc DC motor developed for autofocus drive of EF lens in early days. Unlike USM motors, AFD motors focus by sound.

Do: multilayer differential optical element multilayer diffractive optical element

Representative lens: EF 400/4 DO is USM

Electron focusing electron focusing

The bayonet name of Canon EOS camera is also the serial name of EOS original lens.

Electromagnetic aperture

The electromagnetic drive aperture control elements of all EF lenses are integrated components of deformable stepping motors and aperture blades, which are controlled by digital signals and have high sensitivity and precision.

Fl: fluorite fluorite

A calcium fluoride crystal with extremely low dispersion has better ability to control chromatic aberration than UD lens. Strictly speaking, fluorite is not glass, but crystal. Its refractive index is very low (1.4) and it is not affected by humidity. Generally speaking, fluorite lenses are not exposed, so you are unlikely to touch them directly. Although fluorite lens is not as impact-resistant as ordinary glass, it is not as fragile as expected, so it does not need special care in use.

FTM: Full-time manual focusing Full-time manual focusing.

That is to say, at any time, even if the lens is autofocusing, the focal length can be manually adjusted without damaging the lens.

luxury goods

A symbol of Canon's professional lens. Compared with consumer lens, L-head has ground aspheric lens, UD (low dispersion), SUD (ultra-low dispersion) or fluorite lens, which are important foundations for excellent optical quality of lens. Usually, the quality of lens structure is much better. Its logo is the red mark on the front of the lens, which is Canon's top professional lens.

Representative lens: EF70-200/2.8 LU

Is: image stabilizer image stabilizer

The IS lens allows you to use a shutter speed that is two steps lower than the theoretical speed. That is to say, when you use an ordinary 300mm lens, you can only choose the speed of1/more than 250 seconds, while using a 300mm IS lens, you can take a clear picture in 1/60 seconds.

Representative lens: EF28- 135/3.5-5.6 U IS

Micro-motor

This is a traditional motor with a transmission shaft. It consumes more electricity. Full-time manual (FTM) is not supported. Mostly used for cheap low-end lenses.

Sf: soft focus SF: soft focus lens

The photo taken with this lens is very different from the effect of camera moving or focusing incorrectly. It uses carefully designed spherical aberration to make the shot scene clear and focused, soft and beautiful. The effect of soft focusing depends on the aperture size and special adjustment device.

Representative lens: EF 135/2.8SF

S-ud: super ultra-low dispersion high performance ultra-low dispersion lens

The effect of a UD is similar to that of a fluorite lens.

Ts: tilt shift lens

Shifted lenses are most suitable for architecture, landscape and commercial photography. EF shift lens has no AF function.

Canon's TS lenses currently include TS-E24/3.5L, TS-E45/2.8 and TS-E90/2.8.

UD: ultra-low dispersion ultra-low dispersion lens

A special type of optical glass is widely used in lens chromatic aberration control because it can control the dispersion of light in the spectrum. The effect of using two UDs together is usually similar to that of using fluorite lenses.

Usm/USM/U: ultrasonic motor

The focus motor type used by most EF lenses uses a vibration source with a frequency in the ultrasonic region to rotate, which is the main component to realize quiet and high-speed AF. There are two kinds of ultrasonic motors for EF lens, namely annular USM and miniature USM. There is a yellow ring at the front of the lens with ultrasonic motor, which is marked with "Ultrasonic". Ring ultrasonic motor is a focus motor used in Canon's advanced USM lens. Its driving part is annular, and it does not need to use any transmission parts such as gears when driving. Because of the large torque, the starting and braking speed is much faster than that of the general focus motor. Full-time manual operation can only be realized in the ring ultrasonic motor head, but it should be noted that full-time manual operation cannot be realized, such as EF 200/ 1.8L, EF 500/4.5L and EF 600/4L, EF 50/ 1.0L, EF 85/ 1.2L, etc. Micro ultrasonic motor is a small cylindrical ultrasonic motor, which is not as fast as ring ultrasonic motor and has low noise, so it can't focus manually all the time. However, due to the low manufacturing cost, it is mostly used for middle and low-grade EF lenses.

Representative lens: EF24-85/3.5-4.5U.

Pentax:

A: A series manual focusing lens.

AF/MF: manual/autofocus switching.

Aluminum: aspherical lens.

CF macro: continue to focus on macro macro.

DA: DA lens is a special digital lens designed by Pentax for digital SLR cameras with APS-C format. It is marked with a green circle and cannot be used on Quan Huafu models.

Ed: ultra-low dispersion ultra-low dispersion lens.

F: Pentax's early autofocus lens mount.

FA: It is also Pentax's AF lens mount, which has two more electronic contacts than F mount.

If: interfocus internal focusing.

Limited edition: Limited edition lens is also Pentax high-performance and high-grade lens.

M: m series manual focusing lens.

Meter (abbreviation for meter)) Minimum object distance closest focal length.

PowerZoom: electric zoom.

SMC:Super Mluti coating super multi-layer coating, Pentax unique lens coating technology, strong anti-glare ability.

Soft focus: soft focus lens

*: * Mirror is Pentax's advanced professional lens, just like Canon's L-head, commonly known as star mirror.

Examples show that the FA* 80-200 F2.8 ED lens represents Pentax professional star lens, with a focal length of 80-200mm, a constant maximum aperture of F2.8 and an ED ultra-low dispersion lens. FA3 1mm F 1.8al limited lens represents a limited edition lens, with a fixed focus of 3 1mm and an aperture of F 1.8, and an aspheric lens is adopted.

Minolta/Sony lens article:

AD: Abnormal dispersion is used to eliminate dispersion, similar to Nikon ed. APO: Apochromatic uses apochromatic design and special low-dispersion glass lens to reduce aberration, thus improving the imaging quality, contrast and clarity of telephoto lens.

ASP: aspheric lens.

Cir: the smooth background blur effect of circular aperture makes the background defocus naturally.

D: Distance lens with ranging information can realize flash control.

DT: Digital technology Digital technology is a digital lens specially designed for APS-C digital SLR cameras. At present, several DT lenses are made by Longteng.

G: Unlike Nikon's G-series lens without aperture ring, Minolta's G-series lens is Minolta's advanced professional lens, which is the floorboard of a series of top workmanship and materials. Usually it has the following characteristics: constant large aperture, AD lens, circular aperture, aspheric lens, floating focusing system, high-quality lens body and so on.

New: New lens.

SAL: Sony Alpha lens refers to the lens launched after Sony acquired Konica Minolta camera business, which is basically Minolta lens, but with a different name.

SF: Soft focus soft focus lens.

TC: rangefinder.

STF: The focused image of the smoothing transformer is smooth, and the representative lens is Minolta 135STF. Through the optical element called apodization filter installed near the aperture, the amount of light passing through the central part of the lens is more, but decreases as it moves to the periphery. Therefore, it is an ideal soft virtual image to form a faded outline in the defocused imaging part. At present, there is only one Minolta 135STF in the world, and Sony, a product that has changed its medicine, is not counted.

SSM: Ultrasonic motor Ultrasonic motor, which can realize silent and quick response autofocus.

UC:Ultra Coating technology, konica lens coating technology.

Plane: Karl? Zeiss lens.

Sonnar: Carl, who adopted Sonnar's structural design? Zeiss lens.

T*: Carl? Zeiss multilayer coating technology is also the most advanced coating technology in the world.

VS:Vari soft variable soft focus, Minolta soft focus lens.

VFC: Variable field of view control variable field of view curvature lens, which can change the curvature of the image field.

Vario: Is the zoom lens Carl's? The logo of Zeiss lens

Za: Carl? The lens designed by Zeiss for Sony adopts Sony α bayonet, which belongs to autofocus lens.

Examples show that AF APO 70-200mm F2.8G(D) SSM represents Minolta G series professional lens, with focal length of 70-200mm, constant maximum aperture F2.8, apochromatic design, D information and SSM ultrasonic motor; And vario-sonnar T * dt 16-80mm f 3.5-4.5za means Carl, focal length16-80mm, maximum aperture f3.5-4.5, Sony α bayonet, and T * multilayer coating technology. Zeiss Sonnar series digital special lens.

Olympus/Panasonic lens article:

ASPH: aspheric lens.

Leica designed a digital lens for Panasonic.

ED: ultra-low dispersion lens.

Zukio: Olympus traditional camera lens adopts OM bayonet, which is not common with the bayonet of 4/3 system digital SLR camera and needs to be used through adapter ring.

Zukio Digital:Zukio lens is a product of the digital age, and it has been redesigned to meet the requirements of the digital age.

SWD: Ultrasonic drive ultrasonic motor, a new technology just developed by Olympus, has been applied to several lenses released by PMA2007.

MEGA O.I.S: Panasonic's optical anti-shake system.

Summilux: At present, the lens produced by Leica will be named Summilux as long as its aperture value is F 1.4, such as Leica D Summilux 25mm f1.4aph. ..

Elmar: At present, the lens produced by Leica will be named Elmar as long as the aperture value is about F4, such as Leica de Vario-Elmar14-150 mm F3.5-5.6 asphmega O.I.S.

Hermary Te: At present, the lens produced by Leica will be named Hermary Te as long as its aperture value is around F2.8, such as Leica de Vario-Hermary Te14-50 mm F2.8-3.5 asphmega O.I.S.

Example: Zukio Digitized ED 12-60mm f 2.8-4SWD lens represents the special lens for digital SLR camera of Olympus 4/3 system, with focal length12-60mm and maximum aperture F2.8-4, adopting ED ultra-low dispersion lens and SWD ultrasonic motor; Leica dvario-elmar 14- 150mm f 3.5-5.6 ASPH mega o.i.s lens indicates that the focal length is14-150mm, the maximum aperture is f3.5-5.6, and asph aspheric lens and mega are adopted.

Longteng article:

Ad: Abnormal dispersion has abnormal dispersion, and Longteng lens with this symbol has the function of conditionally eliminating dispersion.

ASL: aspheric lens.

ASPH: compound aspheric lens.

Di: Digitally integrated digital lens, a digital traditional universal lens with digital optimization design, can be used for APS digital SLR cameras and Quan Huafu models.

Di Ⅱ: Longteng's small field lens specially developed for APS digital SLR cameras can only be used on APS digital SLR cameras. If: internal focus.

LAH: LD hybrid aspheric lens is used.

Ld: low dispersion low dispersion lens.

SP: Super-performance lens, Longteng's high-performance large aperture lens, is also Longteng's professional lens series.

XR: High refractive index lens, which can greatly reduce the volume and weight of the lens on the premise of ensuring the luminous flux and imaging quality, is mostly used in the field of Longteng large zoom ratio lens.

Vc: manual correction function of vibration compensation. Longteng's optical anti-shake system has just been developed. At present, there is only one: AFDI 28-300mm F3.5-6.3xr VC LD ASP [if] macro.

ZL: zoom ring locking mechanism.

Example: AFDI 28-300mm f 3.5-6.3xr VC LD ASP [if] macro lens represents the traditional digital universal lens, with a focal length of 28-300mm and a maximum aperture of F3.5-6.3. XR high refractive index lens, LD low dispersion lens, ASP aspherical lens, internal focusing design, macro function and VC optical image stabilization system are adopted.

Tuli article:

AS: aspheric lens.

Advanced technology -Xtra has specially advanced technology to design the lens.

D: digitally optimized lenses are more suitable for the requirements of the digital age, such as AT-XM100 Pro D.

DX: Digital lens specially designed for APS format digital SLR cameras, and cannot be used on Quan Huafu models.

M: Macro lens.

Pro:professional lens, which is Tuli's top grade, has an AT-X lens with a gold ring at the front.

SD: Ultra-low dispersion ultra-low dispersion lens.

SZ-X: The lightest Tuli zoom lens series, which belongs to manual focusing lens.

SZ/SMZ: Tuli amateur lens series, which also belongs to manual focusing lens.

If: internal focus.

Examples show that the AT-X Pro 50- 135mm F2.8 DX lens has a focal length of 50- 135mm and a constant maximum aperture of F2.8. It is an AT-X series professional lens specially designed for APS digital SLR cameras.