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IRIX 15mm f/2.4 Firefly Lens for Canon EF

BH #IR15FFC • MFR #IL-15FF-EF
IRIX
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

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 Length15mm
Maximum Aperturef/2.4
Minimum Aperturef/22
Lens MountCanon EF
Lens Format CoverageFull-Frame
Angle of View110°
Minimum Focus Distance11.02" / 28 cm
Optical Design15 Elements in 11 Groups
Diaphragm Blades9, Rounded
Focus TypeManual Focus
Image StabilizationNo
Filter Size95 mm (Front)
Gel Filter (Rear)
Dimensions (ø x L)4.49 x 3.94" / 114 x 100 mm
Weight1.28 lb / 581 g
Packaging Info
Package Weight2.555 lb
Box Dimensions (LxWxH)6.75 x 5.65 x 5.6"

IRIX 15mm f/2.4 Firefly Reviews

NOT a lens for professionals

By denis
Rated 2 out of 5
Date: 2022-05-19

After using this cheap option for over 3 years, I have to confess this is not a good product for professional photographers. Seems like it was purposefully designed to be soft. I highly Do NOT recommend this line of lenses.

Great Wide Angle Lens

By Oey
Rated 5 out of 5
Date: 2021-11-15

great lens. affordable and able to get great results.

Great value

By Neil
Rated 5 out of 5
Date: 2021-10-18

Bought this for landscape and Astrophotography. I've been pleased. Only con thus far is the lens hood can be tough to click on and off and the lens cover is par and with most lens. Again a great value for the performance. Shooting on a Canon 5DSR with tripod and Internal ND filters.

good value

By Bodie
Rated 4 out of 5
Date: 2021-07-30

light and crispy, perfect for rollers

Solid choice for night sky photography

By Teresa
Rated 5 out of 5
Date: 2021-07-26

This lens, which I bought expressly for night-sky photography, captures a wide swath of the sky. There is distortion of any straight objects in the photo (for example, if a building is shown in the foreground) but that is to be expected with this super-wide lens. Minimal coma in the corners, which is an issue I've had with other wide-angle lenses. And best of all... the infinity setting really IS infinity, and it has a click-stop so I know when I've hit it in the dark. I have this same lens for my Canon 6D (also used for night-sky photography) and the fact that I bought one for my new Pentax should make it clear how much I like this lens.

Great lens for the money.

By Dwayne
Rated 5 out of 5
Date: 2021-07-13

I use this lens for Astro and having the indent for infinity focus works great.

Happy with photos, lens features and build quality!

By Amit
Rated 5 out of 5
Date: 2022-03-25

I am a hobbyist who loves landscape and astrophotography and was looking for a cost-effective wide-angle lens to pair with my Canon R6 body. After spending a lot of time searching thru reviews and options, I finally ordered this lens as it was hard to pass on the value effectiveness of this. I was skeptical of manual focus, as I have not used an MF lens in such a very long time since my early film camera days. But I am pleased with usability, picture quality, and lens build quality for my purpose. Some pics are attached. Not seen any unacceptable vignetting in landscape shots, pretty good quality on the edges, tested from f2.5 to f22. I have not had time to take some real astro pics yet, but I did take some with imperfect lighting (see picture) and don't see any unacceptable aberration also compared to what I have seen and shot with rental Sigma 20mm, 1.4 DG HSM art lens. Included pic is 20s @ ISO 6400. As for manual focus, I realized that for most of my use cases, the hyperfocal distance is close enough that can get pretty much everything I need in focus, so focusing error is not a concern. Additional features I like: Infinity focus has a slight click, so you know that's set. Hyperfocal marker feature. Minor issues: Canon R6 reads lowest aperture as f2.5, not f2.4. Also I am using this EF mount lens on RF mount camera with convertor, so the hood is not usable as it shows up in pics. Minor stuff.

Brilliant Sharpness

By Gerard
Rated 4 out of 5
Date: 2022-01-05

So far I have used this lens on a few shoots. It definitely surpassed my Rokinon 14mm in sharpness and quality for not much more money.

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