IRIX 45mm f/1.4 Lens for GFX
The IRIX 45mm f/1.4 is a 45mm f/1.4 lens designed for Fujifilm GFX mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
IRIX 45mm f/1.4 Lens for GFX
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Lens Overview — IRIX 45mm f/1.4
Key Features — IRIX 45mm f/1.4
45mm Medium Format Prime: A standard focal length on the GFX system, covering versatile shooting scenarios including portraiture, editorial, and street photography.
f/1.4 Maximum Aperture: A fast maximum aperture that enables significant subject-background separation and strong low-light capability on a medium format sensor.
Native Fujifilm GFX Mount: Built specifically for the Fujifilm GFX system, ensuring direct mechanical compatibility without adapters.
Manual Focus Only: A manual-only focus mechanism designed for deliberate, precise focus control suited to methodical shooting workflows.
77mm Filter Thread: A widely used filter diameter that is compatible with most existing circular filter systems, avoiding the need for step-up rings.
Medium Format Image Circle: The optical design covers the larger medium format sensor area of GFX cameras without vignetting.
Lens Specifications — IRIX 45mm f/1.4
| Spec | Detail |
|---|---|
| Use Cases | Studio, Fashion |
| Lens Type | Prime |
| Format | Medium Format |
| Zoom/Prime | Prime |
| Focal Length | 45mm |
| Maximum Aperture | f/1.4 |
| Camera System | Medium Format |
| Lens Mount | Fujifilm GFX |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 77mm |
Description — IRIX 45mm f/1.4
The IRIX 45mm f/1.4 is a manual focus prime lens purpose-built for the Fujifilm GFX medium format camera system. With a maximum aperture of f/1.4, it opens up strong low-light potential and meaningful depth of field control on a medium format sensor. The lens mounts natively via the Fujifilm GFX lens mount, ensuring straightforward compatibility with cameras in that lineup.
Its 45mm focal length places it squarely in standard focal length territory for medium format shooters — a versatile choice for portraits, documentary work, and general photography. The 77mm filter thread aligns with one of the most common filter sizes available, so integrating it with existing filter kits should be hassle-free. Weighing 1120g, this is a solid, substantial optic that reflects the scale of large-aperture medium format lens construction.
There is no image stabilization built into the lens, so technique and any body-based stabilization become important considerations. For photographers who prefer deliberate, manual shooting, the IRIX 45mm f/1.4 offers a dedicated, large-aperture option in the GFX ecosystem.
Pros — IRIX 45mm f/1.4
- ✓Fast f/1.4 maximum aperture enables significant subject-background separation on a medium format sensor
- ✓Native Fujifilm GFX mount ensures direct, dedicated compatibility with the GFX camera system
- ✓Standard 45mm focal length covers versatile shooting scenarios from portraits to everyday work
Cons — IRIX 45mm f/1.4
- ✗Manual focus only — no autofocus support, which limits usability in fast-moving or time-sensitive situations
- ✗No image stabilization, requiring careful handholding technique especially at wide apertures
- ✗At 1120g, the lens is substantial and may add noticeable weight to a medium format kit
Frequently Asked Questions — IRIX 45mm f/1.4
Is this lens compatible with my Fujifilm GFX camera?+
Yes. The IRIX 45mm f/1.4 is specifically designed for the Fujifilm GFX mount, as listed in its mount specifications. It is a dedicated medium format lens for the GFX system.
Does this lens have autofocus?+
No. The lens is manual focus only, with autofocus listed as false in the specifications. Photographers will need to focus manually for every shot.
What filter size does this lens use?+
The IRIX 45mm f/1.4 uses a 77mm filter thread, which is a widely used size compatible with many circular filter systems available on the market.
Does this lens have image stabilization?+
No. The specifications confirm that image stabilization is listed as None. You will need to rely on shooting technique or any in-body stabilization your GFX camera body may offer.
How heavy is this lens?+
The lens weighs 1120g according to the specifications. This is a substantial weight typical of large-aperture medium format optics, so factor this into your kit planning.
Is this a zoom or prime lens?+
This is a prime lens with a fixed 45mm focal length. It does not zoom, which is reflected in the specifications showing identical minimum and maximum focal lengths of 45mm.