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Irix 45mm F1.4 Review

Irix 45mm F1.4

Main Features

  • 45mm Focal Range
  • F1.4 Max Aperture
  • Weather Sealed
  • Filter Thread: 77mm
  • Max Format: 35mm FF
  • Pentax KAF2 Mount
  • Weight: 925g.
  • Diameter: mm
  • Length: mm
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Irix 45mm F1.4 Overview

Irix 45mm F1.4 is a Manual Focus (MF) Standard Prime lens with 35mm FF max sensor coverage and it is designed to be used with Pentax KAF2 mount cameras.

Lens Mount

Irix 45mm F1.4 is compatible with cameras that have Pentax KAF2 lens mount. Some of the latest released cameras that are compatible with the Pentax KAF2 lenses are Pentax K-3 III, Pentax K-1 II and Pentax KP.

Irix 45mm F1.4 is also available in Canon EF and Nikon F (FX) mounts.

Focal Range

Irix 45mm F1.4 has a fixed focal lenght of 45mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 67.5mm.


Weather Sealings

Irix 45mm F1.4 is a weather sealed lens which provides an extra protection to prevent water and dust get inside the lens and camera body under light rain, snow and wind. In order to have an effective protection, you have to pair the Irix 45mm F1.4 with a weather sealed camera body such as Pentax K-3 III, Pentax K-1 II and Pentax KP.

Aperture

Irix 45mm F1.4 has a max aperture of F1.4.

Lens Hood

Irix 45mm F1.4 comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.

Body Colour

Irix 45mm F1.4 is available in Black color.

Popular Comparisons of Irix 45mm F1.4

Here is the eight most popular comparisons of Irix 45mm F1.4 amongst Camera Decision readers.

Top Alternatives of Irix 45mm F1.4 Lens
Model Coverage Weight Focusing Street Price
Pentax smc FA 43mm F1.9 Limited Lens Pentax smc FA 43mm F1.9 Limited
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35mm FF 155gr AF Amazon B&H Photo
HD Pentax DA 40mm F2.8 Limited Lens HD Pentax DA 40mm F2.8 Limited
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APS-C / DX 80gr AF Amazon B&H Photo
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35mm FF 220gr AF Amazon B&H Photo
Voigtlander 40mm F2 Ultron SL II Lens Voigtlander 40mm F2 Ultron SL II
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35mm FF 200gr MF Amazon B&H Photo
Pentax smc D-FA 50mm F2.8 Macro Lens Pentax smc D-FA 50mm F2.8 Macro
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35mm FF 265gr AF Amazon B&H Photo
Pentax smc DA 50mm F1.8 Lens Pentax smc DA 50mm F1.8
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35mm FF 122gr AF Amazon B&H Photo
HD Pentax-D FA 50mm F1.4 SDM AW Lens HD Pentax-D FA 50mm F1.4 SDM AW
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35mm FF 910gr AF Amazon B&H Photo
Carl Zeiss Makro-Planar T 250 Lens Carl Zeiss Makro-Planar T 250
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35mm FF 530gr MF Amazon B&H Photo

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**This post contains affiliate links and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

Pros and Cons of Irix 45mm F1.4


PROs
Weather Sealed
Hood supplied
Full-time Manual Focusing
Very Fast Aperture
Covers Full-Frame Sensor

CONs
No Autofocus
Irix 45mm F1.4 Alternatives in Pentax KAF2 Mount
Model Coverage Weight Focusing Street Price
HD Pentax-D FA 50mm F1.4 SDM AW Lens HD Pentax-D FA 50mm F1.4 SDM AW
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35mm FF 910gr AF Amazon B&H Photo
HD Pentax-FA 43mm F1.9 Limited Lens HD Pentax-FA 43mm F1.9 Limited
Compare
35mm FF 155gr AF Amazon B&H Photo
Pentax smc D-FA 50mm F2.8 Macro Lens Pentax smc D-FA 50mm F2.8 Macro
Compare
35mm FF 265gr AF Amazon B&H Photo
HD Pentax DA 40mm F2.8 Limited Lens HD Pentax DA 40mm F2.8 Limited
Compare
APS-C / DX 80gr AF Amazon B&H Photo
Pentax smc DA 40mm F2.8 Limited Lens Pentax smc DA 40mm F2.8 Limited
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APS-C / DX 90gr AF Amazon B&H Photo
Pentax smc DA 40mm F2.8 XS Lens Lens Pentax smc DA 40mm F2.8 XS Lens
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APS-C / DX 45gr AF Amazon B&H Photo
Pentax smc DA 50mm F1.8 Lens Pentax smc DA 50mm F1.8
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35mm FF 122gr AF Amazon B&H Photo
Pentax smc FA 43mm F1.9 Limited Lens Pentax smc FA 43mm F1.9 Limited
Compare
35mm FF 155gr AF Amazon B&H Photo
Pentax smc FA 50mm F1.4 Lens Pentax smc FA 50mm F1.4
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35mm FF 220gr AF Amazon B&H Photo
Samyang 50mm F1.4 AS UMC Lens Samyang 50mm F1.4 AS UMC
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35mm FF 535gr MF Amazon B&H Photo
Sigma 50mm F2.8 EX DG Macro Lens Sigma 50mm F2.8 EX DG Macro
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35mm FF 320gr AF Amazon B&H Photo
Voigtlander 40mm F2 Ultron SL II Lens Voigtlander 40mm F2 Ultron SL II
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35mm FF 200gr MF Amazon B&H Photo
Schneider PC-TS Super-Angulon 2.850 HM Lens Schneider PC-TS Super-Angulon 2.850 HM
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35mm FF 1400gr MF Amazon B&H Photo
Carl Zeiss Makro-Planar T 250 Lens Carl Zeiss Makro-Planar T 250
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35mm FF 530gr MF Amazon B&H Photo
Carl Zeiss Planar T1.4 50 Lens Carl Zeiss Planar T1.4 50
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35mm FF 350gr MF Amazon B&H Photo
Hartblei Superrotator 40mm F4 IF TS Lens Hartblei Superrotator 40mm F4 IF TS
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35mm FF 1550gr MF Amazon B&H Photo
Lensbaby Sol 45 DSLR Lens Lensbaby Sol 45 DSLR
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35mm FF 144gr MF Amazon B&H Photo
Sigma 50mm F1.4 EX DG HSM Lens Sigma 50mm F1.4 EX DG HSM
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35mm FF 505gr AF Amazon B&H Photo

Irix 45mm F1.4 Detailed Specifications


General
Brand Irix
Lens Type Prime
Lens Type Standard Prime
Lens Mount Pentax KAF2
Max Format 35mm FF
Focal Range 45mm
Image Stabilization
Colour Black
Zoom Method No Zoom
Power Zoom No Zoom
Zoom Lock No Zoom
Zoom Ratio 1.0X
APERTURE
Max Aperture F1.4
Min Aperture
Aperture Ring No
Diaphragm Blades 9
Optics

FOCUSING
Min Focus Distance unknown
Max Magnification unknown
Autofocus No
AF Motor Type No AF
Full Time Manual Yes
Focus Method Internal
Distance Scale Yes
DoF Scale Yes
PHYSICAL SPECS
Weight 925g
Diameter Unknown
Length Unknown
Weather Sealing Yes
Filter Thread 77mm
Filter Notes -
Hood Supplied Yes
Tripod Collar No
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Frequently Asked Questions about Irix 45mm F1.4
is the Irix 45mm F1.4 a Weather Sealed lens?
What is the Minimum Focusing Distance of Irix 45mm F1.4
is the Irix 45mm F1.4 an Autofocus (AF) lens?
What is the Filter Thread Size of Irix 45mm F1.4
Does Irix 45mm F1.4 have Image Stabilization?
Does Irix 45mm F1.4 have Aperture Ring?
FOLLOW US


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