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Irix 45mm F1.4

Nikon F (DX/FX)

Irix 45mm F1.4

Focal length
45 mm
Aperture
f/1.4
Weight
905 g
Filter diameter
77 mm
Min. focus distance
40 cm
Length
87 mm
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At a Glance

This manual-focus standard prime for Nikon F-mount full-frame cameras opens up to f/1.4, which brings shorter shutter times in low light and very shallow depth of field. It is weather sealed, its length does not change while focusing, and it focuses down to 40 cm. At 905 g it is heavy. It suits everyday shooting, street photography and dim scenes.

Good for

  • Everyday
  • Street
  • Low light

Worth knowing

  • No autofocus: focusing is manual only.

Derived from the manufacturer data, not from our own tests. How we check

Technical Specifications

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Min. focal length
45 mm
Max. focal length
45 mm
Max. aperture (min. zoom)
f/1.4
Max. aperture (max. zoom)
f/1.4
Min. aperture
f/22
Elements
11
Groups
9
Weight
905 g (2 lb)
Filter diameter
77 mm
Min. focus distance
40 cm (15.75 in)
Length
87 mm (3.43 in)
Diameter
103 mm (4.06 in)
Released
April 2020

Manufacturer data: irixlens.com, irixlens.com

Last checked: October 13, 2026 (against the manufacturer data) · How we check

Simulate depth of field and angle of view

Compare with other lenses

Which cameras does the Irix 45mm F1.4 fit?

The Irix 45mm F1.4 is a full-frame lens for Nikon F-Mount cameras. On full-frame bodies it uses the whole sensor; on APS-C Nikon F-Mount cameras its field of view equals 68 mm in full-frame terms.

Nikon F-Mount cameras

Full frame:
Nikon D6,Nikon D780,Nikon D850,Nikon D5,Nikon D810A,Nikon D4S,Nikon D810,Nikon D750,Nikon Df,Nikon D610,Nikon D4,Nikon D800,Nikon D800E,Nikon D600,Nikon D3S,Nikon D3X,Nikon D700
APS-C:
Nikon D3500,Nikon D7500,Nikon D500,Nikon D3400,Nikon D5600,Nikon D5500,Nikon D7200,Nikon D3300,Nikon D7100,Nikon D5300,Nikon D3200,Nikon D5200,Nikon D5100,Nikon D7000,Nikon D3100,Nikon D300S,Nikon D5000,Nikon D3000,Nikon D90,Nikon D60

With the Nikon FTZ II / FTZ the lens can also be used on Nikon Z (DX/FX) cameras.

Irix 45mm F1.4 compared

Key specs side by side with the most similar Nikon F-Mount lenses.

LensIrix 45mm F1.4Samyang / Rokinon 50mm F1.4 AS UMCSamyang 50mm F1.4 AS UMCZeiss Milvus 50mm F1.4
Focal length45 mm50 mm50 mm50 mm
Max. aperturef/1.4f/1.4f/1.4f/1.4
Weight905 g520 g520 g875 g
Filter diameter77 mm77 mm77 mm67 mm
Min. focus distance40 cm45 cm45 cm45 cm
Length87 mm72 mm72.2 mm94 mm
Autofocusnononono
Image stabilizationnononono
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Irix 45mm F1.4: FAQ

Does the Irix 45mm F1.4 have autofocus?

No, the Irix 45mm F1.4 has no autofocus; you focus it manually.

Does the Irix 45mm F1.4 have image stabilization?

No, the Irix 45mm F1.4 has no stabilization of its own. On cameras with in-body image stabilization (IBIS) the image is still stabilized.

How much does the Irix 45mm F1.4 weigh?

The Irix 45mm F1.4 weighs 905 g. It is 87 mm long with a diameter of 103 mm.

What filter size does the Irix 45mm F1.4 use?

The Irix 45mm F1.4 takes 77 mm screw-in filters.

How close can the Irix 45mm F1.4 focus?

The minimum focus distance of the Irix 45mm F1.4 is 40 cm, measured from the sensor plane.

Is the Irix 45mm F1.4 a full-frame lens?

Yes, the Irix 45mm F1.4 covers full frame. On APS-C cameras its field of view equals 68 mm in full-frame terms.

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