Data sheet: Nikkor AF 28 mm f/2.8

Pekka Buttler, 09/2023


The table below summarises the lens’ key specifications (measurements based on the pictured ‘AF new’ version):

Brand:AF NikkorLens name28 mm 1:2.8
Focal length(s)128 mmAngle-of-view274°
Maximum Aperturef/2.8In Production1986–1991 (AF)
1991–1995 (AF new)
Lens mountNikon FSubfamily (if applicable)AF
Length338,9 mmDiameter462,5 mm
Filter ring diameter52 mmWeight188 grams
Lens element count5Lens group count5
Aperture blades (S/R/C)57 SFocus throw120 °
Minimum focusing distance30 cmsMaximum magnification1:7,6
Has manual aperture ringYESHas Manual focus ringYES

Further notes:
• AF and AF-D versions fundamentally different, and this data sheet covers only the AF (and AF new) version.
• AF and AF new versions differ in that the AF version only has a narrow plastic focus ring, while the ‘new’ version offers a proper rubber focus ring. The ‘old’ version is minutely longer and lighter.
• These lenses (AF and AF new) are optically the same lens as the Nikon series E 28 mm f/2.8 (introduced 1979).
• The Nikkor AF-D 28 mm f/2.8 [data sheet] that replaced this lens looks almost identical, but offers a more elaborate optical design and a shorter MFD.
• The dedicated lens hood is the HN-2 (thread mounted) but an OEM wide hood for 52 mm threads is also an option.

A brief genealogy of Nikon SLR lens types

Nikon is undoubtedly one of the great names in 35 mm SLR photography. The Nikon F mount has been in continuous production since 1959. During that time, the mount has developed/changed in some detail, however without ever fully sacrificing compatibility.

In short (a longer version is here), the development of Nikon’s SLR lenses can be traced as follows:
• 1959–1977: Pre-Ai. Manual focus lenses that use ‘rabbit ears’ to communicate selected aperture with the camera body.
• 1977–1986: Ai and Ai-s. Manual focus lenses that may have ‘rabbit ears’ for backward compatibility, but are designed to communicate selected aperture with the camera body through indentations in base of aperture control ring.
• 1986–today: AF and AF-D. Autofocus lenses that do not have a focusing motor within the lens, but rely on the focus motor within the camera. All AF and AF-D lenses are simultaneously Ai-s lenses (they are Ai-s lenses extended with AF) 6
• 1996–today AF-S and AF-P. Autofocus lenses that have an internal focusing motor and do not rely on the body having a focusing motor.

28 mm lenses are a ‘classic’ wide-angle, and have been available for SLR’s since the retro-focus wide-angle design was introduced. Initially, the typical specifications for such a lens were a focal length of 28 mm coupled with a maximum aperture of f/3.5, but since the mid-70’s 28 mm focal length lenses increasingly received maximum apertures of f/2.8.

Since 1974, Nikon has produced 28 mm f/2.8 lenses based on four distinct designs:
• 1974–1981: Nikkor K and Nikkor Ai – 7 elements in 7 groups, MFD=0,3m;
• 1981–2020: Nikkor Ai-s – 8 elements in 8 groups, with CRC, MFD=0,2m;
• 1979–1995: Nikon series E, Nikkor AF – 5 elements in 5 groups, MFD=0,3m;
• 1995–2020: Nikkor AF-D – 6 elements in 6 groups, MFD=0,25m.
Hence, the design used in this lens has been the most simple approach Nikon has ever used.


Besides adapting, this lens can be used natively on all current high-end Nikon dSLRs and several earlier medium-to-high-end older Nikon dSLRs. Moreover, if the camera body contains a slot-drive focusing motor, this lens will even auto-focus7. Likewise, if the lens has been retrofitted with ‘rabbit ears’, it can be natively used on all Nikon F-mount film cameras ever produced (without the rabbit ears, it is limited to post 1977 bodies).

Thanks to being a fully manual lens (manual aperture, manual focus), the lens can be adapted to all mirrorless cameras using a suitable dumb adapter (and such adapters are easy to find). Moreover, a large range of special adapters (helicoid adapters, tilt/shift adapters, speed boosters) for using Nikon F lenses on most mirrorless systems are available. Currently no adapters for mirrorless exist that would allow autofocus through the slot-drive screw.

Using Nikon F lenses on non-Nikon SLRs and dSLRs is likewise a distinct possibility. Thanks to the relatively generous flange focal distance of the Nikon F mount (46,5 mm), adapter rings for all dSLR mounts are available as well as for a goodly portion of film-era SLR mounts. Such rings will not allow autofocus, and are unlikely to support auto aperture, but even then the lenses can be used in stop-down metering mode.


1 Focal length is (unless stated otherwise) given in absolute terms, and not in Full-frame equivalent. For an understanding of whether the lens is wide/tele, see ‘Angle-of-view’.

2 Picture angle is given in degrees and concerns the diagonal picture angle. Rule of thumb:
> 90 ° ==> Ultra-wide-angle
70–90 ° ==> Wide-angle
50–70 ° ==> Moderate wide-angle
40–50 ° ==> ‘Standard’ or ‘normal’ lens
20–40 ° ==> Short tele lens
10-20 ° ==> Tele lens
5-10 ° ==> Long tele lens
< 5 ° ==> Ultra-tele lens

3 Length is given from the mount flange to the front of lens at infinity.

4 Diameter excludes protrusions such as rabbit ears or stop-down levers.

5 S=straight; R=rounded; C=(almost)circular at all apertures.

6 There is a further sub-class of AF-D lenses called AF-I lenses that are otherwise AF-D lenses (meaning, fully Ai-s compatible), but have an internal focus motor. Only long tele lenses were made in AF-I variants.

7 As of this writing, the following Nikon dSLRs fully support autofocus, aperture priority and manual metered modes on Nikkor AF/AF-D lenses: D2, D3, D4, D5, D6, D200, D300, D300s, D500, D600, D610, D700, D750, D780, D800, D800E, D810, D850, D7000, D7100, D7200