The Nikon F-mount is one of only two SLR lens mounts (the other being thePentax K-mount) which were not abandoned by their associated manufacturer upon the introduction ofautofocus, but rather extended to meet new requirements related tometering,autofocus, andaperture control. The large variety of F-mount compatible lenses makes it the largest system of interchangeable flange-mount photographic lenses in history. Over 400 differentNikkor lenses are compatible with the system.[1] The F-mount is also popular in scientific and industrial applications, most notablymachine vision. The F-mount has been in production for over 60 years, the only SLR lens mount with such longevity.
The F-mount has a significant degree of bothbackward andforward compatibility. Many current autofocus F-mount lenses can be used on the originalNikon F, and the earliest manual-focus F-mount lenses of the 1960s and early 1970s can, with some modification, still be used to their fullest on all professional-class Nikon cameras. Incompatibilities do exist, however, and adventurous F-mount users should consult product documentation in order to avoid problems. For example, many electronic camera bodies cannot meter without aCPU enabled lens; the aperture ofG designated lenses cannot be controlled without an electronic camera body;non-AI lenses (manufactured prior to 1977) can cause mechanical damage to later model bodies unless they are modified to meet theAI specification; andAF-P lenses (introduced in 2016) will not focus, even manually, on cameras introduced before roughly 2013.[citation needed] Many manual focus lenses can be converted to allow metering with consumer Nikon bodies by adding aDandelion chip to the lens.[2]
TheNikon D7000 reveals a modern F-mount design, including aperture lever (left), CPU contacts (top), and mechanical AF linkage (lower left).
The flange of a current F-mount lens, including aperture lever (upper left) and CPU contacts (bottom).
Most Nikon F-mount lenses cover a minimum of the standard 36×24mm area of35mm format and theNikon FX format, whileDX designated lenses cover the 24×16mm area of theNikon DX format, and industrial F-mount lenses have varying coverage. DX lenses may producevignetting when used on film and FX cameras. However, Nikon lenses designed for film cameras will work on Nikon digital system cameras with the limitations noted above.
F-mount lenses lock by turning counter-clockwise (when looking at the front of lens) and unlock clockwise. Nearly all F-mount lenses have zoom and focus controls that rotate in the clockwise direction (as viewed from behind the camera) to increase focal length and focus distance respectively. This convention is also used inPentax K-mount andSony A-mount lenses but is opposite of the direction normally used byCanon.[citation needed] F-mount lenses also typically have aperture rings that turn clockwise to close. The aperture rings have two sets off-stop numbers. On cameras equipped with Nikon's Aperture Direct Readout (ADR) system, a small window under thepentaprism reads the smaller scale and displays the selected f-stop in theviewfinder.
Nikon has introduced many proprietary designations for F-mountNikkor lenses, reflecting design variations and developments both in lenses and the F-mount itself. There are also "unofficial" designations used by collectors and dealers to differentiate similar lenses.
There are four major generations of manual-focus Nikkor lens styles, which may be distinguished cosmetically and functionally:
Manual-focusNikkor lenses
Name
AKA
Example
Cosmetics
Body will meter at full aperture
Focus ring
Meter coupling
Aperture scale
NAI
AI
AI-S
A
F, C, Auto, NAI
F-type ("Pre-AI") lens: Nikkor 50mm 1:1.4.
Scalloped metal
Solid prong, triangular or semicircular
Single row of values, multicolored
Yes
No (stop-down)
K
RIFR
K-type lens: Fisheye-Nikkor 16mm 1:3.5.
Rubber inset, diamond or waffle pattern
AI
—
AI lens: Nikkor 135mm 1:2.8; note multicolored aperture values corresponding to the depth of field scale.
Rubber inset, waffle pattern
Cutaway semicircular prong + ridge
Doubled, large multicolored values and small ADR values in white only
Yes
Maybe
AI-S
—
AI-S lens: Nikkor 50mm 1:1.4; note the smallest aperture value (f/16) is colored orange on both scales.
Doubled, smallest value in orange on both regular and ADR scales
Yes
Nikon F professional SLR camera with eyelevel prism and early NIKKOR-S Auto 1,4 f=5,8cm lens (1959)
A — Auto Nikkor (also unofficiallyF,Pre-AI,Non-AI orNAI), introduced in 1959
Designation for the first generation of F-mount lenses, introduced in 1959. These were all single-coated, and meter coupling was provided by a prong (known as the Meter Coupling Prong) fixed to the lens's aperture ring. The Photomic T through-the-lens light meter introduced in 1965 worked at full aperture, so the maximum aperture of the lens had to be communicated to the meter via a manual setting on the ASA dial. The Nikkormat FTn and FTn metered finder for the Nikon F introduced semi-automatic aperture indexing which was achieved by mounting the lens with the aperture ring set tof/5.6, and then turning the ring to first the minimum and then the maximum apertures. (The need for this step was eliminated by the AI system below.) Early versions are marked "Nippon Kogaku Japan" and have their focal lengths stated in centimetres, but models produced after about 1965 have focal lengths stated in millimetres. The "Nippon Kogaku Japan" engraving was replaced by "Nikon" from 1971 onwards. Mounting a non-AI lens can damage many modern Nikon camera bodies. AI-cameras that still may use non-AI lenses includes theNikon F2A/F2AS with Photomic A (DP-11) or AS (DP-12) finder,Nikon (Nikkormat) EL2, as well asNikon FM andFE. In addition, theNikon Df, a DSLR introduced in late 2013, can use non-AI lenses.[3] The A lenses can be converted to the AI specification; seeAI'd below.
T, Q, P, H, S, O, N, UD, QD, PD — Appears immediately before or after the "Nikkor" name on F-type lenses (see above), designating the number of optical elements in the design. Short for Tres (3), Quattuor (4), Penta (5), Hex (6), Septem (7), Octo (8), Novem (9), UnDecim (11), QuattuorDecim (14) and Penta-Decem (15).[4][5] The terms Unus (1) and Bini (2) were also apparently designated, but never used. Terms P=Penta, H=Hexa, and PD=Penta-Decem (Greek root) were used (instead of Quinque, Sex, and QuinDecim) to avoid ambiguity with Quattuor, Septem and QuattuorDecim. This designation scheme was dropped with the introduction of "Modern" (K-type) Nikkors in 1974.
Auto — Designation for F-type lenses indicating an automatic diaphragm (aperture). Not to be confused with automatic exposure orauto focus, the designation fell out of use in the early 1970s and was not carried onto K-type lenses.
C — Indicates amulticoated F-type lens. Appears with aninterpunct after the number of optical elements (in the form "Nikkor-X·C"). This designation was introduced in 1971 and discontinued in 1974 with the introduction of "Modern" (K-type) Nikkors, when multicoating had become standard practice.
Nikon F2SB professional SLR camera with GN Auto Nikkor 1:2,8 f=45mm AI lens
K — "Modern" or "New" Nikkors introduced in 1974
While Pre-AI for compatibility purposes, K-type lenses introduced the new cosmetics that would be used from 1977 onwards for AI-type lenses (see below). The scalloped-metal focus rings were replaced with rubber grip insets, and the use of element number and coating designations was discontinued. The 'K' designation itself is believed to be derived from the Japanese "konnichi-teki", loosely translatable as "modern" or "contemporary".
Comparison of non-AI (left) and AI (right) aperture signaling systems: note differences in meter coupling prong style and presence of AI meter coupling ridge.
AI — Manual focus with "Automatic Maximum-Aperture Indexing," introduced in 1977
The AI standard adds a Meter Coupling Ridge to the aperture ring, which encodes the current aperture setting relative to the maximum, and a Lens Speed Indexing Post on the mounting flange, which encodes the maximum aperture itself. The Ridge and Post couple to the camera'slight meter. Lenses designated AI-S, Series E, and AF all include these features of AI. Current professional Nikon camera bodies link with the Meter Coupling Ridge, but the Lens Speed Indexing Post is ignored and the maximum aperture value is set electronically by the operator instead. AI-designated lenses also improved on the original Meter Coupling Prong, adding cutaways which allow more ambient light to fall on the aperture ring, increasing visibility on cameras which optically projected the setting inside the viewfinder.
AI'd — An unofficial designation for lenses converted partially (Meter Coupling Ridge only) or completely from non-AI to AI. This is accomplished by replacing the aperture ring and the metering prong (using a long-discontinued kit procured from Nikon) or by modifying the original part. Some independent camera repair technicians continue to offer such conversions.
A typical AI-S lens: A Nikkor 50mm 1:1.4 showing "Nikon" engravings, rubber focus ring, and new-style Meter Coupling Prong distinguished by its cutaway sections. The lens is mounted on aNikon FE2 camera.
AI-S — AI lenses with standardized aperture control, introduced in 1981
The successor to AI, the AI-S specification added two mechanical enhancements — standardized aperture control, and the Focal Length Indexing Ridge — required for theshutter priority and other auto-aperture exposure modes of theNikon FA,F-301/N2000, andF-501/N2020 cameras (although the FA will operate correctly in shutter priority and program modes with any AI lens[6]). Later cameras did not require these features, and interoperate with AI and AI-S lenses identically. The term AI-S is now commonly used to refer to manual focus lenses, and Nikon continues to produce eightprime lens models in its AI-S line. All Nikon AF lenses with aperture rings (non-G) also meet the AI-S specification, except for their lack of a Meter Coupling Prong (which can be added). Visually, AI-S lenses can quickly be identified by the smallest aperture setting (usually f/22) being marked in orange,[7]
Standardized aperture control. AI-S lens apertures move in a standardized fashion in relation to their stop-down levers. The levers of AI and pre-AI lenses were intended only to close the aperture to its manual setting. The advance of aperture control by the camera body itself, by partial actuation of the stop-down lever, meant more precision was required for consistent exposure. This feature is indicated by a Lens Type Signal notch in the lens mount. Note that despite popular misconception, the F4 is NOT capable of engaging P and S auto-exposure modes with non-CPU lenses[8]
Focal Length Indexing Ridge. AI-S lenses with a focal length of 135mm or longer are indicated by a ridge on the lens mount,[7] used by FA and F-501 to engage high-speed-biased Program Autoexposure.
Original AF version; hard plastic focusing ring (at front) with narrow ribbing.
Revised AF-N version; the focusing ring has a rubber inset.
AF (autofocus)
The originalautofocus designation, indicating focus driven by a motor inside the camera body. All AF lenses have an integratedCPU (microprocessor). Used in the form "AF Nikkor", this should not be confused with the original autofocus lenses for theF3AF camera, which were designated "AF-Nikkor" and are considered predecessors to AF-I lenses.
AF-N (autofocus, new version)
Indicates the "New" version of an AF lens. The change from plastic focus rings on early AF lenses to the a new "rubber inset focus ring" (RIFR) is often indicated by the AF-N designation. Introduced in 1990.
AF-I (autofocus, internal focus motor)
Driven by acoreless DC motor. Used only in long telephoto lenses (300 mmf/2.8 through 600 mmf/4.0). Introduced in 1992.
AF-D (autofocus with distance encoder)
Designation for an AF lens (as above) with "D" functionality (see "D" below). Introduced in 1992.
Nameplate of a 1st generation AF-S lens with original "Silent Wave Motor" design
AF-S (autofocus with silent internal motor)
Uses a "Silent Wave Motor" (SWM) (ultrasonic motor) to focus quietly and quickly. Similar to Canon's "USM" technology. Introduced in 1996.
AF-P (autofocus with internal stepper motor)
Autofocus using astepper motor. First F-Mount lens in 2015 after being introduced 2011 in theNikon 1-mount. All DX AF-P lenses omit the physical AF/MF switch — those with Vibration Reduction (VR) omit the VR-switch. Fully AF-P compatible without anyfirmware update are the Nikon D850, D500, D7500, D5600, D3400, D3500, Nikon-1 series with FT1 adapter and newer DSLR cameras. The Nikon Z-mount cameras with FTZ adapter are also fully compatible.[9] Fully AF-P compatible after update are the Nikon D5, D5500 and D5300. After update the following cameras lack a software VR-switch: D4S, D4, D810, D810A, D800, D800E, D750, D610, D600, Df, D7200, D7100 and D3300 – if the lens includes no physical VR-switch, VR is always on. Additionally they lack "Manual focus ring in AF mode", the manual override of autofocus. The Nikon D3X, D3S, D3, D700, D300, D300S, D7000 and D2XS operate only AF-P FX lenses with additionally restrictions that after a reactivation from the standby mode a (quick) automatic or manual refocusing must take place as the focus is reset to infinity as they wake up. To avoid this, the standby time may be set in the camera for a longer time or "Unlimited". The D5200 works with DX and FX lenses, but additionally displays a "Lens not attached" message if a lens lock switch was activated when the camera is turned on.[10] The AF-P focus motor willnot work with all Nikon film cameras and D1 to other D2 series, D200, D100, D5100, D5000, D90, D80, D70 series, D3200, D3100, D3000, D60, D50, D40 and D40X.[11] Standard is VR = on and focus to infinity with all cameras only supporting E-type lenses.[12] Not to be confused with old AI-P "Program" (CPU) lenses.
CPU — Central Processing Unit. The lens is fitted with electrical contacts for digital communication with the camera. All AF and AI-P lenses are CPU lenses. Some non-professional Nikon cameras require CPU lenses for metered operation. This designation appears in specifications but not lens names.
D — Distance. Indicated after thef-number in the name, and also occasionally designated AF-D. The integrated CPU electronically communicates focus distance information, which is incorporated into the camera's exposure calculations in 3D Matrix Metering mode, and also D-TTL and I-TTL flash autoexposure. All AF-I, AF-S, G-type and E-type lenses are also D-type.
E —Electromagneticdiaphragm. The aperture diaphragm of an E lens is controlled digitally by the camera, and actuated electromagnetically by a system housed within the lens, rather than employing the F-mount's traditional mechanical diaphragm linkage. This system first appeared in certain Perspective Control lenses, designated PC-E (with designs that preclude a mechanical linkage). E-type lenses aperture control is only supported by all DSLRs withCMOS image sensor except theNikon D90. The Nikon Z-mount cameras with FTZ adapter are also fully compatible. For all other cameras the lens aperture stays maximum open with normal autofocus and metering. E Lenses with manual aperture control like PC-E lenses allow manual diaphragm operation on all cameras, with possible unreliable metering on DSLRs without E-type support.[13] Otherwise E lenses are similar to G lenses. Not to be confused with old AISeries E lenses.
G — Designation for lenses without an aperture ring, indicated after thef-number in the name. G lenses retain the mechanical diaphragm coupling of other Nikkors, but the aperture setting can only be controlled by the camera body. All Nikon DSLRs and the film autofocus bodies with command dials are capable of controlling G lenses.[14] Older film autofocus bodies will work with G lenses in shutter priority and program modes with full opened aperture.[15][16] Some recent G lenses feature a weatherproofinggasket around the mounting flange. G lenses otherwise have the same characteristics as D lenses.
PorAI-P — "AI with Program." CPU-enabled variation of manual focus AI-S lens. Includes only the 45/2.8P, 500/4P and 1200-1700/5.6-8P Nikkor lenses.Zeiss ZF.2[broken anchor] andVoigtländer SL II[broken anchor] lenses are also AI-P designs, although they are not designated as such. Not to be confused with early lenses marked "Nikkor-P" meaning a 5-element lens (see pre-autofocus designations above).
Aspherical —Aspheric lens elements. AlsoHybrid used: Thin molded aspheric elements coupled to a conventional glass element. This designation appears in specifications but not lens names.
CRC —CloseRangeCorrection. Improved performance at close focus distances, achieved by"floating" lens element(s) which move differently relative to the movement of the other focusing elements. This designation appears in specifications but not lens names.
DC —DefocusControl. DC lenses have a separate control ring for spherical aberration, which affects primarily the appearance of out-of-focus areas, also known asbokeh. At extreme settings, DC lenses can generate an overallsoft focus effect. Includes only the AF DC-Nikkor 105mmf/2D and AF DC-Nikkor 135mmf/2D.
ED —"Extra-lowDispersion" glass incorporated to reducechromatic aberration. Lenses using ED elements usually carry a gold ring around the barrel to indicate the fact (although on some low-end lenses gold foil is used instead), and older lenses were also marked "NIKKOR✻ED". In addition to normal ED glass, "Super ED" glass is used in some lenses.
FL —FLuorite lens element(s). Designates a lens which includes one or more elements constructed offluorite instead of glass. Currently includes the AF-S 800mm f/5.6E FL ED VR, available since 2013, the AF-S 400mm f/2.8E FL ED VR, available since 2014, the AF-S 500mm f/4E FL ED VR and AF-S 600mm f/4E FL ED VR, available since 2015, and the AF-S 70-200mm f/2.8E FL ED VR, available since 2016.
GN —GuideNumber. Assists in flash exposure on cameras without automatic flash metering. The flash's guide number is set on the lens, and the aperture is accordingly coupled to the lens's focus ring for correct exposure. The only GN lens, the supercompact GN Auto Nikkor (it was the second smallest Nikon F-mount lens ever made), was built during the late 1960s and early 1970s. An updated variant with a lens hood was made through the 1990s alongside the FM3a.
HRI —HighRefractiveIndex elements. Contains elements with a refractive index >2. This designation appears in specifications but not lens names.
IF —InternalFocus. Focusing is accomplished through themovement of internal lens group(s), instead of extending the entire lens, allowing focus to be driven quickly by a small motor. When applied to zooms, IF often eliminates rotation of the front lens element, which means IF lenses also allow the use of apolarizing filter without the need to readjust it after focus.
Micro —Micro-Nikkor lenses are capable of high reproduction ratios, typically 1:2 or 1:1, formacro photography. Industrial Nikkor lenses designed for greater than 1:1 reproduction are, in contrast, labeled Macro-Nikkor. The first Micro-Nikkor lenses were created for producingmicroforms ofKanji text.[17]
N — Indicates the Nano Crystal Coat, a relatively new type of lens coating that originated in Nikon's semiconductor division. Lenses with this coating feature the logo of an "N" inside an elongated hexagon on the name plate.
NIC —NikonIntegratedCoating, a proprietary multicoating. Appears in specifications but not lens names.
PC —PerspectiveControl. Lens features shiftmovements to control perspective and depth-of-field; some PC lenses also feature tilt movements. Newer PC lenses are designated PC-E, indicating these use an electromagnetic diaphragm control, per designation E above. Not to be confused with early lenses marked "Nikkor-P·C" meaning a five-element coated lens (see pre-autofocus designations above).
PF —PhaseFresnel element to counteract chromatic aberration. It replaces several lens elements, thus reducing the size and weight of a lens.[18] Like a refractingFresnel lens, the PF element has concentric rings; however, the PF rings are smaller than visible wavelengths of light to take advantage of anomalous dispersion through diffraction, rather than refraction.
RF —RearFocusing. Quite similar to internal focusing. Focusing is accomplished through the movement of rear lens groups, eliminating extension and rotation of the front lens element, allowing focus to be driven quickly by a small motor. RF lenses also allow the use of apolarizing filter without the need to readjust it after focus.
SIC —SuperIntegratedCoating, a proprietary multicoating. Appears in specifications but not lens names.
UV — Lenses designed for imagingultraviolet light.
VR —VibrationReduction. Uses a moving optical group to reduce the photographic effects of camera shake. Some VR lenses also support apanning mode, detecting horizontal movement of the lens and minimizing only vertical vibration. The second generation of VR is calledVR II, which is designed to offer another 1-stop advantage over original VR, but lenses with this feature are still designated simply "VR."
DX — Lens designed for the smallerNikon DX format. AllNikon FX format (35mm full-frame) cameras detect DX lenses and automatically use a cropped DX compatible image sensor area.[19]Vignetting may occur if used on a35mm format film camera or a manually selected DSLR full-frame mode, although some DX lenses cover the full 135 frame at longer focal lengths.
IX — Lenses designed for use with the now-defunct ProneaAPS SLR. These are all autofocus zoom lenses. They are not compatible with cameras outside of the Pronea system unlessmirror lock-up is used[20]
Series E — A line of eight lower-cost lenses manufactured during the 1980s for Nikon's amateur SLRs. They sacrificed some construction quality and employed simpler but often surprisingly good optical designs.[21] Early Series E lenses were built to the AI specification. Later Series E lenses were upgraded to the AI-S specification, and are identifiable by a metal ring on the barrel. None of this family of lenses were brandedNikkor, instead carrying the text "Nikon Lens Series E." Not to be confused with E - type autofocus and electromagnetic diaphragm lenses.
Bellows — Lens designed exclusively for use on abellows unit, primarily formacro photography. Also calledshort mount. Since some Nikon bellows allow for afront rise, they allow a limited variety of lenses to be used similarly to a PC lens (seeOptical design above).
Fisheye-Nikkor —Fisheye lenses producing either a circular image on the film plane/imager or a partially circular image. Can be as wide as 220° or typically 180°. Fisheye lenses are based upon an equidistant projection formula, or an orthographic projection (OP).
LW — Amphibian lens. Produced forNikonos system, featuring a Nikonos lens mount, waterproof, but not designed for underwater use. Ideal for surfers, speleologists.
Medical — Nikkor designation for amacro lens with a built-in ring light strobe system, designed for clinical and scientific applications.
Noct — "Night." Specialty low-light lens designed for maximum sharpness at the widest aperture setting. The name was used with one F-mount lens, the Noct-Nikkor 58mmf/1.2, and was revived for the Z-mount with theNikkor Z 58mmf/0.95 S Noct.
OP — Orthographic Projection. The 10 mm OP Fisheye-Nikkor uses an orthographic image mapping function rather than the equidistant image used on most other fisheye lenses. This is useful for measuring the amount of sky blocked by a building or object.[22] This maintains the same brightness in the image as in the object, with nofalloff at the edges.[4]
UW — Underwater lenses. Produced for theNikonos systems.
These lenses are capable of focusing to close distances, usually resulting in a reproduction ratio of half-size (1:2) with the lens alone; in most cases, full-size (1:1) or greater magnification can be achieved using appropriate accessories, including extension tubes, close-up lenses, or bellows. Special-purpose lenses intended for magnification greater than 1:1 are designatedMacro-Nikkor to distinguish them from theMicro-Nikkor line, which are suitable for general use.
ThePC-E Nikkor 24mm f/3.5D ED Lens of 2008 adds the tilt function to Nikkor's traditional shift functionThe 35mmf/3.5 PC-Nikkor, introduced in 1961. Note the small clearance between the shifting section of the lens and the camera body. The lens cannot be mounted on later camera bodies with protruding prisms.
Nikon PC lenses, like otherperspective control lenses, offer adjustments that duplicate certainview camera movements. The 28mm and 35mm PC lenses supportshifting the lens in relation to the film or sensor plane, while Nikon's 19mm, 24mm, 45mm, and 85mm PC-E lenses also supporttilting.
Nikon currently offers four different PC lenses for sale: the four PC-E Nikkors (2008 and 2016), and the 85mm PC-Nikkor (1999). The 45mm and 85mm "Micro" lenses offer close focus (0.5 magnification) formacrophotography. The PC-E lenses (the "E" designates an electromagnetic diaphragm) offer automatic aperture control with all DSLRs withCMOS image sensor except theNikon D90. With earlier DSLRs and all "analog" film camera models, a PC-E lens operates like a PC lens. The PC Micro-Nikkor 85mmf/2.8D lens offers only preset aperture control, actuated mechanically by pressing a plunger.
In July 1962,Nikon released the first interchangeable perspective-control lens available for asingle-lens reflex camera, the 35mmf/3.5 PC-Nikkor.[196] This was followed in 1968 by a redesigned 35mmf/2.8 PC-Nikkor in which the shifting portion of the lens was further from the camera's body, in order to clear the new "Photomic" meters. The last optical redesign of this 35mm lens was released in 1980.[197]
The 35mm PC-Nikkor did not meet the need of photographers for a wider-angle lens, so in July 1975 Nikon released the 28mmf/4 PC-Nikkor. In February 1981 Nikon released an improved version of this lens, the 28mmf/3.5 PC-Nikkor, with a new optical design. This was the last of the completely manual PC-Nikkors to be offered.
IX-Nikkor zoom lenses were designed and released for the Nikon Pronea line ofAdvanced Photo System SLRs. Although the IX-Nikkor zooms use the same electrical and mechanical F-mount interface, they were designed to cover the smaller APS-H frame size of 16.7×30.2 mm (0.66×1.19 in) with a shorter backfocus than 35 mm Nikkor lenses, so the rear elements of IX-Nikkor lenses protrude more deeply into the camera body than conventional 35 mm Nikkor lenses. This means Pronea cameras can accept conventional Nikkor F-mount lenses, but IX-Nikkor lenses cannot be used with non-Pronea Nikon SLRs without locking up the mirror. IX-Nikkor lenses use the same electronic communications as Nikkor AF lenses with distance encoding (AF-D), so they may be adapted to Z-mount mirrorless interchangeable lens cameras in DX (cropped sensor) mode.[220]
Nikkor lenses designated AF-S, AF-I and AF-P have integrated autofocus motors, but other manufacturers included in the list do not designate it as clearly. These lenses are needed for autofocus on certain newer low-end Nikon cameras which lack an autofocusmotor. Without autofocus motor are theNikon D40,D40X,D60, D3xxx (most recent:D3500), D5xxx (most recent:D5600), theNikon 1 series with FT1 adapter and the Nikon Z-mount cameras with FTZ adapter.[230]
Zeiss ZF series lenses are manual-focus designs Nikon AI-S type aperture indexing. They are manufactured byCosina to Zeiss specifications.
Four design variations are designated ZF, ZF.2, ZF-I, and ZF-IR.
ZF is the original product line. ZF.2 lenses are CPU-enabled (similar to Nikon AI-P lenses) offering full metering compatibility with the full range of AF Nikon SLR cameras. ZF-I lenses add mechanical locks for focus and aperture, and additional environmental sealing, for industrial applications. ZF-IR lenses are adapted toinfrared imaging, with coatings that transmit wavelengths up to 1100 nm, and focus scales marked for infrared.
CP.2 lenses are a series of Zeiss "CompactPrime" cinema lenses which present F-mount as one of three mounting options. The lenses cover the 36×24 mm area of the35mm format orNikon FX format, and lenses 28 mm and longer share a commonT-stop (T/) of 2.1.
^abcdefgTwo-part telephoto consists of optical lens "head" and focusing mount. As released in 1964, the original focusing mount (designated CU-1) weighs approximately 1,200 g (2.6 lb) by itself; a separate "cradle" improves the tripod mount. An updated focusing mount (designated AU-1) was released with the ED lens heads in 1975 and weighs 2,400 g (5.3 lb) by itself and eliminates the need for the cradle while adding a 52mm drop-in filter holder. Both the CU-1 and AU-1 include an aperture with automatic stop-down, but neither has a metering prong to couple with the in-body light meter. The AU-1 relocates focusing and aperture controls closer to the lens mount.[113][114]
^The earliest (pre-AI) versions were equipped with a preset (not automatic) diaphragm. Later (still pre-AI) versions were updated to a compensating automatic aperture, in which the diaphragm setting would open up as the lens is focused closer. The last versions removed this "compensating diaphragm" feature, and require metering adjustments based on focusing distance.
^The 120mmf/4Medical–Nikkor is capable of reproduction ratios from1⁄11–1×; a supplemental doublet which threads into the front and is provided with the lens, allows reproduction ratios of 0.8–2×.
^Six supplemental lenses are provided with the 200mmf/5.6Medical-Nikkor, which are labeled as1⁄8×,1⁄6×,1⁄4×,1⁄2×, 1×, and 2×. These can be used singly or in pairs to change reproduction ratio & focus distance. Without any lenses, the native reproduction ratio is 1:15. When stacking pairs, the weaker lens is mounted first, closer to the front of the parent lens:
1⁄3× by stacking1⁄6× and1⁄4× lenses
2⁄3× by stacking1⁄4× and1⁄2× lenses
3⁄2× by stacking1⁄2× and 1× lenses
3× by stacking 1× and 2× lenses
^Prototype version of the 80-200/2.8ED featured two-ring control with a filter size of 86mm and nominal diameter and length of 91.5×204 mm (3.60×8.03 in).
^64.5 mm (2.54 in) extension from lens flange; 69 mm (2.7 in) long, overall
^abCooper, Joseph D.; Abbott, Joseph C. (1968).Nikon F Nikkormat Handbook of Photography(PDF) (1st ed.). New York: Amphoto. pp. 5.1 –5.85 – via Pacific Rim Camera, Reference Library.
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No (stop-down)
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