Fisheye · Full frame

Nikon Nikkor AI-S 6mm f/2.8 Fisheye

The Nikon Nikkor AI-S 6mm f/2.8 Fisheye is a full frame prime lens (6 mm, f/2.8) for Nikon F. It belongs to the fisheye class — ideal for creative ultra-wide views, skateboarding, interiors and all-sky astro.

6 mmf/2.8Nikon F
6 mm
Focal length
f/2.8
Maximum aperture
149°
Diagonal angle of view (Full frame)
Full frame
Designed for

Specifications#

Brand
Nikon
Model
Nikkor AI-S 6mm f/2.8 Fisheye
Lens type
Fisheye
Focal length
6 mm
Maximum aperture
f/2.8
Image circle
Full frame (36×24 mm)
Mount(s)
Nikon F
Projection
Fisheye
Lensfun correction profile
Yes — distortion/vignetting/TCA

Equivalent focal length on different cameras#

Field of view and depth-of-field equivalence when this lens is used on bodies with different sensor sizes (natively or via an adapter).

Camera formatAt 6 mmEquiv. aperture (DoF)
Full frame6 mm · 149°f/2.8
APS-C9 mm · 134°f/4.2
APS-C (Canon)10 mm · 132°f/4.5
Micro Four Thirds12 mm · 122°f/5.6

Depth of field & background blur#

Computed on its native Full frame format (CoC 30 µm). “Blur @2 m” is the size of an out-of-focus point at infinity, as a percentage of frame width, with the subject at 2 m — a simple bokeh index. Full table: 14 mm f/2.8 on full frame.

FocalApertureat 1 mat 2 mat 5 mat 10 mHyperfocalBlur @2 m
6 mmf/2.8∞∞∞∞43.5 cm0.0%
6 mmf/4∞∞∞∞30.6 cm0.0%
6 mmf/8∞∞∞∞15.6 cm0.0%

Handheld & night-sky limits#

NPF assumes typical 20–24 MP sensors (≈6 µm pixels on full frame, ≈3.9 µm on APS-C, ≈3.3 µm on Micro Four Thirds).

BodyMin. handheld shutter (longest focal)500 rule at 6 mmNPF at 6 mm, f/2.8
Full frame1/6 s83 s46 s
APS-C1/10 s56 s36 s
APS-C (Canon)1/10 s52 s35 s
Micro Four Thirds1/13 s42 s33 s

Adapt it to other systems#

Frequently asked questions#

Is the Nikon Nikkor AI-S 6mm f/2.8 Fisheye full frame?

Yes — it covers the full 36 × 24 mm frame.

What is the Nikon Nikkor AI-S 6mm f/2.8 Fisheye equivalent to on APS-C?

On a 1.5× APS-C body it frames like 9 mm, and like 10 mm on Canon APS-C.

What is the Nikon Nikkor AI-S 6mm f/2.8 Fisheye good for?

As a fisheye it suits creative ultra-wide views, skateboarding, interiors and all-sky astro.

Sources & licences#

Last updated October 03, 2026 · How we calculate · Sources