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IRIX 15mm f/2.4 Blackstone Lens for Canon EF

BH #IR15BSC • MFR #IL-15BS-EF
IRIX
IRIX 15mm f/2.4 Blackstone 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
Offering a wide-angle perspective, and characterized by its premium exterior build, the 15mm f/2.4 Blackstone Lens from Irix is a sophisticated prime lens designed for Canon EF-mount cameras. Benefitting the broad field of view is an advanced optical design that features aspherical, low-dispersion, and high-refractive index glass elements to control various aberrations and distortions, as well as maintain accurate and consistent color. A Neutrino coating is also utilized to control lens flare and ghosting and achieve a high degree of contrast and color fidelity when working in strong lighting conditions.
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IRIX 15mm f/2.4 Blackstone Overview

Offering a wide-angle perspective, and characterized by its premium exterior build, the 15mm f/2.4 Blackstone Lens from Irix is a sophisticated prime lens designed for Canon EF-mount cameras. Benefitting the broad field of view is an advanced optical design that features aspherical, low-dispersion, and high-refractive index glass elements to control various aberrations and distortions, as well as maintain accurate and consistent color. A Neutrino coating is also utilized to control lens flare and ghosting and achieve a high degree of contrast and color fidelity when working in strong lighting conditions.

Complementing the optics, this 15mm f/2.4 makes use of 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 Blackstone version of this focal length, this lens is also distinguished by an aluminum and magnesium alloy exterior, engraved lens markings with fluorescent UV paint for high visibility, and extensive weather-sealing about the lens to permit working in harsh environments.

The Blackstone version of the 15mm f/2.4 lens features a durable aluminum and magnesium alloy housing and weather-resistant exterior along with inner seals, and an extra seal at the front element, to protect against dust and moisture intrusion. The metal exterior also distinguishes itself with an anti-scratch finish, and sports engraved focus distance and depth of field scales with fluorescent UV paint for high visibility when working in low-light conditions.
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 Blackstone 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
Weight1.51 lb / 685 g
Packaging Info
Package Weight2.55 lb
Box Dimensions (LxWxH)7.6 x 6 x 5.9"

IRIX 15mm f/2.4 Blackstone Reviews

This lens kicks booty!

By Joe
Rated 5 out of 5
Date: 2021-03-25

Procured a Nikkor 15/3.5 AIS of recent vintage and did a side by side and the Irix walks all over it. Nikon has a particular look and this copy is not a dog. It doesn't compare to the Irix. The Irix handles ghosting and flare very well with exception when pointing towards the sun. The Nikkor flare and ghosting is much worse. The Irix has less distortion, is sharp as a tack, has excellent contrast, and captures a precise rendering. It's a Zeiss killer but you didn't hear that here! Wish the lens hood was metal (I fear it will get crushed some how). The Irix was on sale for $600 w/tax at BHPhoto. It just doesn't get any better folks that this folks. I have legendary Zeiss offerings and this lens is in that league in terms of image quality. Very impressive performance! Well done Irix!!!

An Outstanding Lens!

By James J.
Rated 5 out of 5
Date: 2020-08-30

This is an absolutely amazing lens. Totally impressed with it and love the image quality I am getting with it. No regrets with this purchase and this is now my main go to wide angle lens in my kit....

Great lens, not expensive

By Henry S.
Rated 5 out of 5
Date: 2020-08-20

I like this lens a lot. I bought it for some astro+landscape photography, and have used it a couple of times for that application. It has the cool feature of being able to lock the focus in place, so you can literally lock it and forget it.

Sharp as a tack.

By Lawrence
Rated 5 out of 5
Date: 2020-08-02

Brilliant colors, excellent sharpness, and minimal distortion. It isn't properly calibrated though and when I tried the calibration procedure I couldn't remove the calibration plate. It WILL focus to infinity though and I can work around it. I love this lens.

tried two copies..

By Michael
Rated 2 out of 5
Date: 2020-11-14

I RMA the first copy hoping the second try would resolve the very soft corners and passable center sharpness. In the end I had to RMA the second lense as well. Positives + Solid build quality + little heavy, but expected + loved the front filter thread + loved the locking focus ring negatives - very poor corner sharpness - passable center sharpness I was really hoping for a happy ending to this story. I'm a real estate photographer and videographer. This lense would have been perfect for my use case.

Very Disappointed

By Jeffrey
Rated 1 out of 5
Date: 2020-11-02

I had high hopes for this lens. The pics were horrible. Edges were so soft looked like they were smeared. B+H customer service is tops on returns. Samyang xp 14 mm is ordered.

Excellent wide angle lens for Nikon FX camera

By Robert
Rated 5 out of 5
Date: 2020-10-25

I use this lens with my Nikon D810. Fabulous wide angle. Not many choices for Fx at this focal length. Searched extensively, read lots of reviews, then chose this lens. Excellent build quality. Having taken many pictures with it by now, I can save you the fret and anxiety of investing in a new lens... just buy the Irix 15mm blackstone !!!!!!!

built like a tank

By Jay
Rated 5 out of 5
Date: 2020-09-23

sincerely this lens was better than I expected, built in a alloy barrel with a rubber seal ring, weather sealed, Very Sharp and chromatic Aberration is None or close to none, the distortion is near to zero witch is rare in a gran angular lens witch mean the lens was made it with a good quality glass, pretty impressed with this lens, since I got it like a month ago, is mounted in my camera 75% percent of the time .... love it and looking forward to get more from lens IRIX . Totally recommend 👌

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Will this fit a canon Reble t8i ?

Will this fit a canon Reble t8i ?
Asked by: Fred
Yes, this lens is compatible with the T8i but this is a manual focus lens only, no autofocus.
Answered by: Rob
Date published: 2020-09-22

Will this be able to be mount on a canon ...

Will this be able to be mount on a canon mirrorless full frame with the adaptor?
Asked by: Jennifer
Yes this would be able to mount on a Canon Mirrorless Full Frame camera with the EF-RF adapter.
Answered by: Zachariah
Date published: 2021-02-10

Can you adjust the aperture manually?

Can you adjust the aperture manually?
Asked by: Christopher
No, you cannot. The aperture of the IRIX 15mm f/2.4 Blackstone Lens for Canon EF, B&H # IR15BSC, would be controlled by the dials built onto your Canon body.
Answered by: Manzell
Date published: 2020-09-19

Is this lens focus by wire?

Is this lens focus by wire?
Asked by: Richard
Not focus by wire, it is full manual focus.
Answered by: Zachariah
Date published: 2021-01-31

Which square filter holder would work for this ...

Which square filter holder would work for this lens?
Asked by: Andrea
There are several options but I would recommend this Format kit: https://bhpho.to/3qYQvBH
Answered by: Dan
Date published: 2021-03-17

Will this lens fit the canon reble t8i?

Will this lens fit the canon reble t8i?
Asked by: Fred
Yes, it will fit the T8i and is manual focus only.
Answered by: Rob
Date published: 2020-09-21

Can the aperture of this lens be controlled by ...

Can the aperture of this lens be controlled by the BlackMagic Pocket Cinema 6K camera?
Asked by: Dan
The 4K works fine with this lens and the metabones adapter if that is of any help.
Answered by: Mike
Date published: 2019-11-06

Does this lens auto focus confirmation work with ...

Does this lens auto focus confirmation work with the Nikon D7500 ?
Asked by: Fernando Guillermo
Yes, this lens has electronic contacts.
Answered by: Rob
Date published: 2021-02-08
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