Skip to product overview

IRIX 15mm f/2.4 Blackstone Lens

The Irix 15mm f/2.4 is a 15mm f/2.4 lens designed for Canon EF, Nikon F, Pentax K mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

IRIX 15mm f/2.4 Blackstone Lens

IRIX 15mm f/2.4 Blackstone Lens

Get notified when one lists.

We'll text or email you the moment a IRIX 15mm f/2.4 Blackstone Lens is listed on GearFocus.

Have a Irix 15mm f/2.4 sitting in your bag?

You'd be the first listing for this model.
Serious buyers are already watching — list yours in minutes.

Sell your Irix 15mm f/2.4 on GearFocus

Available Now on GearFocus

Irix Dragonfly 150mm f2.8 Macro Lens for Nikon F
IrixLike New

Irix Dragonfly 150mm f2.8 Macro Lens for Nikon F

$304.98
Free shipping
IRIX Cine Production Set (15/21/30/45/65/150mm, EF Mount)
Deal
IrixLike New

IRIX Cine Production Set (15/21/30/45/65/150mm, EF Mount)

1 watching
$4,850.00$5,200.00-7% OFF
IRIX 45mm T1.5 Cine Lens for Canon EF
IrixGood

IRIX 45mm T1.5 Cine Lens for Canon EF

$522.58
Free shipping

Lens Overview — Irix 15mm f/2.4

The Irix 15mm f/2.4 Blackstone is a manual-focus ultra wide-angle prime lens designed for full-frame DSLR camera systems. With a maximum aperture of f/2.4, it offers solid light-gathering capability for a lens in this focal length range, making it a practical option for landscape, astrophotography, and architectural work where a wide field of view is needed. The lens is available in three mount options — Canon EF, Nikon F, and Pentax K — giving it broad compatibility across major DSLR platforms.

Its 15mm focal length sits firmly in ultra wide-angle territory, delivering expansive coverage that full-frame shooters will appreciate. The filter thread measures 95mm, which is on the larger side and worth factoring into your accessory budget when considering compatible filters. At 685g, the Blackstone has a solid, substantial feel without being excessively heavy for a lens of this type.

Focus is entirely manual, with no autofocus capability, which suits the deliberate, considered approach that wide-angle landscape and architectural photographers often prefer. Image stabilization is not included, which is typical for a manual prime at this focal length. Overall, this is a well-specified prime for DSLR shooters who prioritize wide coverage and a fast maximum aperture.

Key Features — Irix 15mm f/2.4

15mm Ultra Wide-Angle Prime: Fixed 15mm focal length delivers expansive field of view well-suited to landscapes, astrophotography, and architecture on full-frame bodies.

f/2.4 Maximum Aperture: Fast maximum aperture for an ultra wide-angle prime, allowing usable exposures in low-light and night sky shooting situations.

Full-Frame Coverage: Designed to cover a full 35mm image circle with no vignetting on full-frame DSLR sensors.

Manual Focus Only: Dedicated manual focus ring suits the deliberate, precise focus approach typical of landscape and astrophotography workflows.

Three Mount Options: Available in Canon EF, Nikon F, and Pentax K mounts, covering the major DSLR platforms.

Infinity Click-Stop: Hard-stop at infinity focus allows quick, reliable focus setting in the dark without needing to check the viewfinder.

Lens Specifications — Irix 15mm f/2.4

Irix 15mm f/2.4 full specifications
SpecDetail
Use CasesAstrophotography, Travel
Lens TypeUltra Wide-Angle
FormatFull Frame
Zoom/PrimePrime
Focal Length15mm
Maximum Aperturef/2.4
Camera SystemDSLR
Lens MountCanon EF, Nikon F, Pentax K
AutofocusNo
Focus TypeManual
Image StabilizationNone
Filter Thread95mm

Description — Irix 15mm f/2.4

The Irix 15mm f/2.4 Blackstone is a manual-focus, ultra wide-angle prime built for full-frame DSLR shooters. Available in Canon EF, Nikon F, and Pentax K mounts, it offers wide platform compatibility for photographers already invested in major DSLR systems. The f/2.4 maximum aperture is a notable strength at this focal length, letting in ample light for low-light and nighttime shooting scenarios.

At 685g, the lens has a reassuringly solid build without becoming a burden on the camera. The 95mm filter thread is worth noting before purchase — filters at this diameter carry a price premium, so budget accordingly if you plan to use polarizers or ND filters. With no autofocus and no image stabilization, this lens is purpose-built for photographers who value manual control and deliberate technique.

It is classified as an ultra wide-angle prime, making it well-suited to expansive landscape compositions, interior architectural shots, and night sky photography on full-frame DSLR bodies.

Pros — Irix 15mm f/2.4

  • ✓Fast f/2.4 maximum aperture provides strong light-gathering for an ultra wide-angle prime
  • ✓Broad mount compatibility covers Canon EF, Nikon F, and Pentax K systems
  • ✓Full-frame coverage (lensFormat: Full Frame) ensures no crop factor concerns on compatible bodies

Cons — Irix 15mm f/2.4

  • ✗Manual focus only — no autofocus support, which may limit appeal for action or event shooters
  • ✗No image stabilization included
  • ✗95mm filter thread diameter means filters will be significantly more expensive than smaller thread sizes

Videos — Irix 15mm f/2.4

Irix 15mm f/2.4 'Blackstone' lens review with samples (Full-frame and APS-C) — Christopher Frost

Resources & Downloads — Irix 15mm f/2.4

Manuals & Guides

Frequently Asked Questions — Irix 15mm f/2.4

Which camera mounts is this lens compatible with?+
The Irix 15mm f/2.4 Blackstone is available in Canon EF, Nikon F, and Pentax K mounts. It is designed for DSLR camera systems and covers full-frame sensors.
Does this lens have autofocus?+
No — focus is entirely manual. The lens has no autofocus mechanism, so focusing must be done by hand. This is a deliberate design choice that suits photographers who work methodically, such as landscape or architectural shooters.
What filter size does this lens take?+
The Irix 15mm f/2.4 Blackstone uses a 95mm filter thread. This is a large diameter, so compatible circular filters will be at the higher end of the price range compared to more common sizes.
Will this lens cover a full-frame sensor?+
Yes — the lens is specified with a Full Frame lens format, meaning it is designed to provide full coverage on full-frame DSLR bodies without vignetting.
Does the lens include image stabilization?+
No, image stabilization is listed as None in the specifications. Shooters working in low light will need to rely on the f/2.4 maximum aperture, a stable shooting technique, or in-body stabilization if their camera body provides it.

Similar to Irix 15mm f/2.4

Loading similar products...