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Irix 11mm f/4 G

11 mm · f/4 · Nikon F AF, Canon EF

The Irix 11mm f/4 G is a 11 mm prime lens with a maximum aperture of f/4 for the Nikon F AF, Canon EF, Pentax KA mounts. Here are its field of view on different sensors, hyperfocal distances, Milky Way exposure limits and the cameras it fits.

Focal length
11 mm
Max aperture
f/4
Mount
Nikon F AF
Designed for
Full frame

Field of view by sensor

SensorDiagonal angle of view35 mm equivalent
Full frame126.1°11 mm
APS-C (1.5×)104.2°17 mm
Canon APS-C (1.6×)101.7°18 mm
Micro Four Thirds89.0°22 mm

Hyperfocal distance

Focal lengthf/5.6f/8f/11f/16
11 mm0.7 m0.5 m0.4 m0.3 m

Circle of confusion 0.030 mm (sensor size the lens is designed for).

Longest exposure for sharp stars

CameraNPF rule (wide open)500 rule
Full frame (24 MP)28.8 s @ f/445.5 s
Full frame (45 MP)24.7 s @ f/445.5 s
APS-C (24 MP)23.4 s @ f/429.7 s

Cameras that fit (264)

Where to buy

B&H PhotoAmazonKEH (used)MPB (used)

FAQ

What is the Irix 11mm f/4 G equivalent to on APS-C?
About 16 mm (1.5×) or 18 mm on Canon APS-C (1.6×).
Which cameras is the Irix 11mm f/4 G compatible with?
It fits Nikon D40, Nikon D40X, Nikon D50, Nikon D60, Nikon D70 and more (see the full list above).