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IRIX 15mm f/2.4 Firefly Lens for Canon EF

BH #IR15FFC • MFR #IL-15FF-EF
60 reviews
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IRIX 15mm f/2.4 Firefly Lens for Canon EF
Key Features
  • Canon EF-Mount/Full-Frame Format
  • Aperture Range: f/2.4 to f/22
  • Two Aspherical Elements
  • Two ED and Three HR Elements
An impressively wide prime lens, the Canon EF-mount 15mm f/2.4 Firefly Lens from Irix meshes an advanced optical design with a lightweight, durable physical construction. The expansive field of view is complemented by a sophisticated optical layout that utilizes low dispersion, aspherical, and high-refractive glass elements, as well as a Neutrino coating, to render imagery with low distortion, controlled spherical and chromatic aberrations, high contrast, and natural color rendering.
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IRIX 15mm f/2.4 Firefly Overview

From Manufacturer

An impressively wide prime lens, the Canon EF-mount 15mm f/2.4 Firefly Lens from Irix meshes an advanced optical design with a lightweight, durable physical construction. The expansive field of view is complemented by a sophisticated optical layout that utilizes low dispersion, aspherical, and high-refractive glass elements, as well as a Neutrino coating, to render imagery with low distortion, controlled spherical and chromatic aberrations, high contrast, and natural color rendering.

In addition to the imaging performance, this 15mm f/2.4 utilizes a manual focus design for fine-tuned control, and incorporates a unique positive focus lock to secure the focusing position at any point for consistent, repeatable shooting. As the Firefly version of this focal length, this lens is also distinguished by a lightweight ABS plastic exterior, printed lens markings, and weather-sealing about the lens housing to permit working in trying environmental conditions.

The Firefly version of the 15mm f/2.4 lens features a lightweight ABS plastic exterior construction that is sealed against moisture and dust along the main body of the lens. The Firefly construction also incorporates a rubber focus ring for improved grip and control, and has printed focus distance and depth of field scales to aid working with pre-focusing and hyperfocal focusing techniques.
Wide-angle prime designed for full-frame Canon EF-mount DSLRs, this lens can also be used on APS-C models where it provides a 24mm equivalent focal length.
Two aspherical, three high-refractive index, and two extra-low dispersion elements are featured within the optical design to limit both spherical and chromatic aberrations, as well as color fringing and distortion, for improved clarity, sharpness, and even illumination.
A Neutrino coating has been applied to limit lens flare and ghosting for improved contrast and color fidelity.
Manual focus designed is benefitted by a positive focus lock mechanism to secure your focus position at any point to limit unwanted shifting of focus.
A hard click stop indicates the infinity position on the focus ring for easy use in low-visibility conditions.
Large depth of field scale benefits using hyperfocal and pre-focus techniques.
Front of lens has 95mm-diameter filter threads and the rear of the lens accepts 30 x 30mm cut gel filters to lessen the likelihood of vignetting.
Rounded nine-blade diaphragm contributes to smooth bokeh.
Includes complimentary additional rear lens cap.

IRIX 15mm f/2.4 Firefly Specs

Focal Length
15mm
Aperture
Maximum: f/2.4
Minimum: f/22
Lens Mount
Canon EF
Lens Format Coverage
Full-Frame
Angle of View
110°
Minimum Focus Distance
11.02" / 28 cm
Optical Design
15 Elements in 11 Groups
Aperture/Iris Blades
9, Rounded
Focus Type
Manual Focus
Image Stabilization
No
Filter Size
95 mm (Front)
Gel Filter (Rear)
Dimensions
ø: 4.49 x L: 3.94" / ø: 114 x L: 100 mm
Weight
1.28 lb / 581 g
Packaging Info
Package Weight
2.555 lb
Box Dimensions (LxWxH)
6.75 x 5.65 x 5.6"

IRIX 15mm f/2.4 Firefly Reviews

Good deal!

By shari
Rated 5 out of 5
Date: 2025-08-24

Night photo lens. This is a great lens. I was expecting 1/2 stars to be blurry and I would have to return (as I had done with Rokinon lenses). Sharp stars. Little coma on edges of picture. All the stars are in focus.

Excellent lens for Bmpcc 6k

By Jorge
Rated 5 out of 5
Date: 2023-06-27

Very good lens and good quality, is just as i expected, works perfecy with de bmpcc 6k

See any errors on this page?

Do this lens have Sony e mount?

Do this lens have Sony e mount?
Asked by: Anonymous
Unfortunately for the time being there isn't one.
Answered by: Ryan
Date published: 2021-08-26

¿Funcionará esta lente con la Canon EOS 800D?

¿Funcionará esta lente con la Canon EOS 800D?
Asked by: Victor
Este lente si es compatible con su camara EOS 800D (T7i)
Answered by: Luz
Date published: 2022-01-10

What is the difference between the Firefly model ...

What is the difference between the Firefly model and the Blackstone Model? Which would be better with a Canon M-50 with the M to EF/EFS adapter? Can it also be used for landscape photography? Thank you for your time
Asked by: Steven
The IRIX 15mm f/2.4 Firefly Lens for Canon EF has a Weather-Sealed ABS Plastic Housing; the Blackstone version has a Weather-Sealed Magnesium Alloy Housing. Either lens will work equally well for landscape photography.
Answered by: Boyd H
Date published: 2022-10-09

Will this lense work with Canon RP ?

Will this lense work with Canon RP ?
Asked by: Hanh
The IRIX 15mm f/2.4 Firefly Lens for Canon EF has a Canon EF mount, while the Canon EOS RP Mirrorless Camera has a Canon RF mount. The lens can be used on the camera with the Canon Mount Adapter EF-EOS R, BH #CAMAEFRF.
Answered by: Lawrence C
Date published: 2023-06-30

Hi, I use this lens with a canon EOS RP and the ...

Hi, I use this lens with a canon EOS RP and the EF adaptor. Why is the lens doesn't go down to 2.4, and get stuck at 2.5?
Asked by: Nicolas
I have similar setup (EOS r) and see same but I do not find the lens is “stuck”. When canon reports it at f2.5, the lens is wide open. And IRIX rates this lens at f2.4 which is a mathematical result of focal length and aperture diameter. Canon reports f stop numbers in 1/3 increments (typical setup). 2.5 is 2/3 of stop between f2 and 2.8. This is same on all Canon EOS camera.
Answered by: David
Date published: 2021-03-24

Is this from China ?

Is this from China ?
Asked by: Hanh
Country of origin of the IRIX 15mm f/2.4 Firefly Lens for Canon EF is South Korea.
Answered by: Daniel C
Date published: 2023-07-06

are the optics between the two versions exactly ...

are the optics between the two versions exactly the same? only the chassis/weather sealing being the difference? thx
Asked by: RYAN
Regarding the IRIX 15mm f/2.4 Firefly Lens for Canon EF, yes, the optics between the Firefly and Blackstone variants are similar. The Firefly variant features a plastic body, lower weight, and only partial weather sealing. The Blackstone is completely weather sealed, and it sports a metal body and fluorescent engraved lettering.
Answered by: Elliot
Date published: 2024-12-10

does this lens work on Blackmagic Pocket 6k G2?

does this lens work on Blackmagic Pocket 6k G2?
Asked by: Alfonso
Yes, the Blackmagic Design Pocket Cinema Camera 6K G2 is compatible with the IRIX 15mm f/2.4 Firefly Lens for Canon EF.
Answered by: Samik G
Date published: 2025-03-31
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