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IRIX 45mm f/1.4 Prime Lens

The IRIX f/1.4 Prime Lens is a 45mm f/1.4 lens designed for Canon EF, Nikon F, Pentax K mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

IRIX 45mm f/1.4 Prime Lens

IRIX 45mm f/1.4 Prime Lens

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Lens Overview — IRIX f/1.4 Prime Lens

The IRIX 45mm f/1.4 is a full-frame prime lens designed for DSLR camera systems, available in Canon EF, Nikon F, and Pentax K mounts. With a maximum aperture of f/1.4, it delivers strong low-light capability and the ability to achieve a shallow depth of field, making it a compelling choice for portrait, street, and available-light photography. The 45mm focal length sits comfortably in the standard range, offering a perspective close to natural human vision that works well across a wide variety of shooting scenarios.

Focus is entirely manual, which suits photographers who prefer precise, deliberate focus control — particularly useful in controlled environments like studio work or landscape photography where focus accuracy is paramount. The lens accepts 77mm filters, a common size that integrates easily into most photographers' existing filter systems. Weighing in at 925g, it is a substantial piece of glass, reflecting the build quality typically associated with a large-aperture prime.

There is no image stabilization, so a steady hand or support system is advisable in lower-light conditions. Overall, the IRIX 45mm f/1.4 presents a versatile standard prime for DSLR shooters across three major lens mounts.

Key Features — IRIX f/1.4 Prime Lens

f/1.4 Maximum Aperture: Wide maximum aperture allows for shooting in low-light conditions and achieving a shallow depth of field with smooth background separation.

45mm Standard Focal Length: Offers a perspective close to natural human vision, making it versatile for portraits, street, and everyday photography.

Full-Frame Coverage: Designed to cover a full-frame image circle, making it compatible with both full-frame and APS-C DSLR bodies.

Manual Focus Only: Fully manual focus design gives photographers deliberate, precise focus control suited to studio, landscape, and tripod-based shooting.

Three Mount Options: Available in Canon EF, Nikon F, and Pentax K mounts, covering the majority of DSLR camera systems.

77mm Filter Thread: Standard 77mm filter diameter is widely compatible with most photographers' existing filter collections.

Lens Specifications — IRIX f/1.4 Prime Lens

IRIX f/1.4 Prime Lens full specifications
SpecDetail
Use CasesStudio, Fashion
Lens TypePrime
FormatFull Frame
Zoom/PrimePrime
Focal Length45mm
Maximum Aperturef/1.4
Camera SystemDSLR
Lens MountCanon EF, Nikon F, Pentax K
AutofocusNo
Focus TypeManual
Image StabilizationNone
Filter Thread77mm

Description — IRIX f/1.4 Prime Lens

The IRIX 45mm f/1.4 is a manual-focus prime lens built for full-frame DSLR systems, available in Canon EF, Nikon F, and Pentax K mounts. Its f/1.4 maximum aperture makes it well-suited for low-light shooting and gives photographers meaningful control over depth of field. The 45mm focal length falls squarely in the standard range, providing a natural perspective that translates well across genres including portraiture, street photography, and everyday documentary work.

With a 77mm filter thread, it pairs easily with polarizers, ND filters, and other popular accessories. At 925g, the IRIX 45mm f/1.4 is a solidly built lens with noticeable heft. Focus is manual only, with no autofocus capability, and there is no image stabilization — factors buyers should weigh based on their preferred shooting style and subject matter.

Pros — IRIX f/1.4 Prime Lens

  • ✓Wide maximum aperture of f/1.4 enables strong low-light performance and shallow depth-of-field control
  • ✓Full-frame coverage suits both full-frame and crop-sensor DSLR bodies
  • ✓Broad mount compatibility across Canon EF, Nikon F, and Pentax K systems

Cons — IRIX f/1.4 Prime Lens

  • ✗Manual focus only — no autofocus support, which may limit use in fast-moving or action scenarios
  • ✗No image stabilization, which can be a challenge in low-light handheld shooting despite the wide aperture
  • ✗At 925g, the lens is notably heavy and may add significant weight to a DSLR kit

Videos — IRIX f/1.4 Prime Lens

Irix 45mm f/1.4 'Dragonfly' lens review with samples — Christopher Frost

Resources & Downloads — IRIX f/1.4 Prime Lens

Manuals & Guides

Frequently Asked Questions — IRIX f/1.4 Prime Lens

Which camera mounts is the IRIX 45mm f/1.4 compatible with?+
The IRIX 45mm f/1.4 is available in Canon EF, Nikon F, and Pentax K mounts. It is designed for DSLR camera systems and covers a full-frame image circle.
Does the IRIX 45mm f/1.4 have autofocus?+
No, this lens is manual focus only. Photographers who require autofocus will need to look elsewhere, but those who prefer deliberate focus control will find manual operation well-suited to studio, landscape, or portrait work.
What filter size does the IRIX 45mm f/1.4 use?+
The lens uses a 77mm filter thread, which is a widely used size compatible with many popular filter systems and accessories.
Does the IRIX 45mm f/1.4 have image stabilization?+
No, the lens does not include image stabilization. Photographers shooting in low-light conditions may want to use a tripod or other support, or rely on any in-body stabilization their camera body provides.
How heavy is the IRIX 45mm f/1.4?+
The lens weighs 925g, making it a relatively substantial prime. This is worth considering when planning handheld shooting sessions or building out a travel kit.
Is the IRIX 45mm f/1.4 suitable for full-frame cameras?+
Yes, the lens is designed with a full-frame image circle, making it fully compatible with full-frame DSLR bodies in the supported mounts. It can also be used on crop-sensor DSLRs.

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