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IRIX 15mm f/2.4 Firefly Lens for Nikon F

BH #IR15FFN • MFR #IL-15FF-NF
IRIX 15mm f/2.4 Firefly Lens for Nikon F
Key Features
  • Nikon F-Mount/FX Format
  • Aperture Range: f/2.4 to f/22
  • Two Aspherical Elements
  • Two ED and Three HR Elements
An impressively wide prime lens, the Nikon F-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 Nikon F-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 FX-format Nikon F-mount DSLRs, this lens can also be used on DX models where it provides a 22.5mm 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

Key Specs
Focal Length
15mm
Maximum Aperture
f/2.4
Lens Mount
Nikon F
Lens Format Coverage
Full-Frame
Focus Type
Manual Focus
Image Stabilization
No
Filter Size
95 mm (Front)
Gel Filter (Rear)
Maximum Aperture
f/2.4
Minimum Aperture
f/22
Lens Mount
Nikon F
Lens Format Coverage
Full-Frame
Angle of View
110°
Minimum Focus Distance
11.02" / 28 cm
Optical Design
15 Elements in 11 Groups
Diaphragm Blades
9, Rounded
Focus Type
Manual Focus
Image Stabilization
No
Filter Size
95 mm (Front)
Gel Filter (Rear)
Dimensions (ø x L)
4.49 x 3.94" / 114 x 100 mm
Weight
1.28 lb / 581 g
Packaging Info
Package Weight
2.515 lb
Box Dimensions (LxWxH)
12 x 5.2 x 5"

IRIX 15mm f/2.4 Firefly Reviews

See any errors on this page? Let us know

Does this lens work on Nikon Z6?

Does this lens work on Nikon Z6?
Asked by: Wassim
I contacted IRIX with your inquiry. They replied that the compatibility of IRIX lenses with Nikon Z cameras (with FZ adapter) has been announced on their Instagram account on October 2018. They state that there are no issues with using IRIX lenses with the Nikon Z cameras using the FTZ lens mount adapter, so you should have no issues using the IRIX 15mm f/2.4 Firefly Lens for Nikon F on the Nikon Z-series Mirrorless Digital Cameras with the FTZ Lens Mount Adapter. The lens' focal length and aperture information will also be transmitted to the camera's EXIF data, along with exposure settings. That being said, do note that this is a manual focus lens, so you will still have to focus the lens manually when using the Nikon FTZ Lens Adapter.
Answered by: Manzell
Date published: 2022-04-01

Will this lens work on a Nikon D3300?

Will this lens work on a Nikon D3300?
Asked by: Karen
Yes, the IRIX 15mm f/2.4 Firefly Lens for Nikon F is compatible with the Nikon D3300.
Answered by: Daniel
Date published: 2023-11-10

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
Date published: 2022-10-09

For the Pentax mount version, will it work with a ...

For the Pentax mount version, will it work with a film Pentax camera like the ZX-5n which has Av and Tv settings or the fully manual K1000 SE? I understand that there is no aperture ring so I would not be able to select the aperture on a fully manual camera like the K1000 and the aperture would default to 22 which would be fine for my intended purpose (landscape photography with a large DoF mounted on a tripod). Was wanting this to use with a K-1 Mk II special for night sky astrophotography landscapes and also be able to use it with my old ZX-5n and a K1000 SE for daytime landscapes. I already have a 95mm night sky light pollution filter - which is why I would prefer this lens over the Roki 14mm 2.8 which won’t accept filters but does have an aperture ring and would likely work fine on my film camera.
Asked by: Roy
It will mount to the older Pentax film cameras.
Answered by: Patrick
Date published: 2020-07-09

is the 22.5 equv focal length if used on an ASP-C ...

is the 22.5 equv focal length if used on an ASP-C going to feel like a regular 21-ish mm focal length? it's so wide at 15mm!
Asked by: Israel
The IRIX 15mm f/2.4 Firefly Lens for Pentax K is a full-frame lens. On an APS-C camera it will feel like a 22.5 mm (35 mm equivalent). For reference a 18 mm on a APS-C is 27 mm equivalent.
Answered by: samikg
Date published: 2023-11-13

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
Date published: 2023-06-29
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