15mm - Irix lenses were designed with both the effort and experience, of not only engineers, but also photographers. Swiss precision and Korean innovation create

Irix 15mm f/2.4

  • Most versatile wideangle lens on the market
  • Exceptional corner to corner quality
  • Front filter thread, rear filters slot
  • Fast f/2.4 aperture
  • Well controlled, low distortion: 2%
  • Easy and precise focusing with innovative infinity click function

Wide Open Possibilities

for your creativity

Canon EF,
Nikon F,
and Pentax K

Multiple Mounts

35mm Full Frame
Works with both FF
and APS-C Cameras

Full-Frame Lens

You can use screw-on (95mm)
square filters with an IFH-100 filter holder

Filters compatible

Only 2%

Low Distortion

Fully Weather-sealed,
ready for any conditions

Weather Sealed

Rear Gel Filter Slot allows for even more creative photography

Rear Gel Filter Slot

Available in Firefly
Blackstone version

2 Versions

This features “locks”
the lens’ focus ring
at any focus distance,
eliminating accidental focus pulls

Focus Lock

Focusing has never
been so fast,
easy, and precise.

Infinity click

PASM mode,
and data is recorded in EXIF.

Communication with

Comes with the lens, lens cap, and soft pouch or hard case.

Comes Fully-Equipped

Creative Tool

It doesn’t matter if you are a professional photographer looking for a lens for your next job, or an amateur looking to expand your focal range – the Irix 15mm f/2.4 is a right choice for every landscape photographer!

The Irix 15mm f/2.4 lens is an ultra wide-angle lens created for your full frame (35mm) camera, available in Nikon F, Canon EF, and Pentax K mounts.

This lens will allow you to open up to a completely new type of photography – thanks to the 110-degree field of view you will be able to capture eye-catching images, and the excellent optical properties will make the image sharp and full of details.

Compatible with filters

What makes the Irix 15mm f/2.4 lens unique is the possibility of using both classic 95mm screw-on filters, as well as square filters, thanks to the Irix Edge IFH-100 holder!
Every landscape photographer uses filters – they allow a creative approach to photography, which makes them extremely practical. The filters that you can use with the Irix 15mm f/2.4 lens are all 95mm filters, such as the Irix Edge:
UV & Protector – protects your lens against damage
Circular Polarizer – cuts off unwanted reflections and increase the clarity of the photo
Neutral Density – decrease the amount of light reaching the camera sensor, thus allows, for example, creatively to blurs the motion in your photographs.
Light Pollution – cuts off the light of cities, making your night photos full of detail without a yellowish haze

Irix Edge IFH-100 Filter Holder allows you to expand your camera’s capabilities thanks to Gradual Neutral Density filters with different gradients: Soft, Hard and Reverse. By cutting off part of the light from the brightest part of the image, you can shoot even in the most difficult lighting conditions.

Perfect for night photography

Night photography is not only interesting but also highly rewarding – it allows you to easily create eye-catching images, if you have the right lens. The Irix 15mm f/2.4 is an irreplaceable tool for any astrophotographer – its fast aperture of f/2.4, combined with a short focal length allows you to capture spectacular shots of the night sky and the Milky Way.

The night is yours!

Ready for Any Conditions

It doesn’t matter if you’re traversing the hot sands of the Sahara or the frigid expanse of Antarctica – Irix lenses never back down from any challenge.
The sealing system has been designed to protect the inside of the lens from moisture, dust, and sand. Equally important, the lens does not change its dimensions during focus pulling, eliminating the risk of dirt particles getting swept into the internal structure. These properties not only allow you to work in demanding conditions, but also guarantee the cleanliness of the camera’s mirror chamber sensor.

Optics that guarantee sharp images

Creativity, ideas, and effort put into a photograph would be nothing without the right lens. Thanks to many years of experience in optical design, Irix lenses are characterized by their excellent resolution and minimal distortion (2%) and vignetting. The Irix 15mm f/2.4 lens consists of as many as 15 elements arranged in 11 groups: 4 refractive elements, 2 ED elements and 3 aspherical elements. The focusing distance is only 28cm which, in combination with the f/2.4 light and 9 rounded aperture blades, make the lens stand out with extremely smooth bokeh with an amazing perspective.

You compose the frame – we will take care of the rest!

One Lens – Two Versions

The Irix 15mm f/2.4 comes in two verisons: Firefly and Blackstone.

Firefly – Lightweight composite construction, with an embossed rubber focus ring, allowing for smooth and precise focusing. Included with the lens is a soft pouch.

Blackstone – Reinforced full-metal construction. All lens markings are engraved and filled with a UV-reactive paint enabling easy focusing in dark enviornments. Included with the lens is a hard case.

Intelligent Lens Design

The Irix 15mm f/2.4 lens has a module that allows you to control the lens’ iris directly from the camera, thanks to which popular semi-automatic modes (PASM) and data recording in EXIF format are available.

The use of electronics also enable the lens to be equipped with a focus confirmation system – the camera will announce the correct focus setting (either in the form of an icon in the viewfinder or with a sound), every time you set the focus correctly – it’s easy and convenient!

It’s worth noting that Irix lenses have the appropriate correction profiles that are pre-loaded and readable by software (such as Adobe Lightroom and Adobe Photoshop), that will make your shooting experience even more enjoyable.

Additional Features

Click at infinity – enables precise, easy, and quick focusing. During focusing, you will feel the exact moment when your lens sets to infinity, which is extremely useful when shooting in difficult lighting conditions (i.e. at night).

Focus Lock – allows you to lock the focus ring in a specific position, which is extremely beneficial when you want to keep a specific focus plane i.e. in astrophotography, or when using the hyperfocal scale.

95mm front filter thread – allows you to use screw-in filters such as Irix Edge UV & Protector, Irix Edge Circular Polarizer, Irix Edge ND, and Irix Edge Light Pollution filter and others.

Compatible with Irix Edge IFH-100 Filter Holder – allows you to expand your creativity thanks to Gradual Neutral Density filters with different gradients: Soft, Hard and Reverse

Rear Gel filter slot – allows the use of Neutral Grey filters mounted on the rear of the lens, which is a unique feature of the Irix 15mm f/2.4 and Irix 11mm f/4.0 lenses.

Circular Polariser Adjustment Window – the lens hood is equipped with a sliding window, allowing you to freely rotate the polarizing filter without the risk of getting dirty.

Focus Calibration window – due to the specifics of focus detection in DSLR cameras based on phase detection,  it may sometimes happen that the lens needs to sync with the camera. Thanks to this special opening, you can easily calibrate the lens at home using basic tools within 5 minutes. Fast, simple and effective!

irix lense detail

Available Mounts

The Irix 15mm f/2.4 is available in Nikon F, Canon EF, and Pentax K mounts.

Check out Irix Store now >


Image size

35mm ”Full Frame”

Focal length


Field of View

110⁰ (diagonal)

Focusing range

0.28 m (0.92 ft) – ∞

Focusing type

manual with lock function

Aperture range

f/2.4 – f/22

Aperture control

via camera

Aperture shape

9 rounded blades

Lens construction

15 elements in 11 groups

3x HR, 2x ED, 2x ASP

Front filter thread


Rear gel filter slot

30 x 30 mm

Available mounts

Canon EF, Nikon F, Pentax K

Dimensions (D x H)

114 x 100 mm (4.49” x 3.94”)


Canon EF  

Firefly: 568 g

Blackstone: 647 g

Nikon F

Firefly: 546 g

Blackstone: 619 g

Pentax K

Firefly: 555 g

Blackstone: 635 g







Opinions of our customers
4.75 based on 10 reviews

This is a fun lens. Love the close focus.


It is a lens with great luminosity and performance, highly recommended for night photography, star photography and landscaping. Enchanted with its features and simplicity.


I LOVE the way this lens feels! Solid build and smooth focus. Upgraded to the Irix 15mm from a Rokinon 14mm f/2.8 and couldn’t be happier. The focus has a small stop or indent at infinity which I have found very accurate for astrophotography. No more hunting for infinity with my old Rokinon 14mm! My new Irix Blackstone arrived packaged in a metal box inside of the cardboard box AND included a nice protective travel case.

John H.

Did an interior architecture shoot this weekend with a D800. Using infinity focus and f8, I was able to get great edge to edge sharpness with little distortion and vignetting. The colour rendition was well balanced. The corrections in Lightroom were minor. Actually great Bokeh wide open on close ups. Great lens.


Build quality is superb. Smooth focus with clicks in at infinity. Very sharp lens out to the corners. Distortion is very well controlled. Little bit of vignetting but not bad. Easily fixable in post processing, if necessary. Very easy to use, for most my shots I set it on at infinity and set the aperture more than f5.6 to get every things in focus.


A few years ago I went into real estate photography (not expensive ones). Very soon I realized that my Tamron 15-30/2.8 has very plaguy restrictions. It’s too narrow for tiny toilets, and its distortion at 15mm kills the picture. The first problem was solved with the purchase of IRIX 11mm. After couple months of testing, I found the Irix quality totally satisfy my needs. Then I proceed with Irix 15/2.4. Again, no complains. Personally, I’m not a fun of manual lens (problems with eyes), but it’s OK for tripod shooting. This lens gives no distortion and very sharp (f11-f16, as recommended for architecture).


After reading a number of reviews on this lens I decided to get this for Astro photography. I havent really had an opportunity to use it for that purpose but it has proved to be a sharp lens. The build of the Firefly is good but not great and seems a bit tight when mounting on my D750. The lens hood leaves something to be desired feeling plasticy and so tight that you fear you may break it trying to put it on and take it off. Overall once on and locked at desired focal length, the lens works nicely and is extremely sharp even at f/2.4 and much better at f/4 with improvements seen on the outside edges. Worth the money but I might have gone for the Blackstone just on build quality and fit alone.


Great lens for the price, very sharp, fantastic perspective.


I love the lock function once focused better than taping it for Milky Way.


The Super Duper Super-wide Lens
On a recent outing with my full frame Pentax K1 I had hoped that my current Lens, a 24-70mm zoom lens, would be sufficient to capture everything I wanted but, much to my chagrin, was greatly mistaken. Yes, the individual photos turned out alright but with a super wide angle lens they could have been great. The Lens I really wanted was a super-wide zoom but I was not willing to pay the $2000 price tag which came with it for a lens I seldom use. Enter the Irix 15mm F/2.4 Firefly. Because it is a prime lens distortion is very well controlled without any curved lines when they should be straight. At F/2.4 it is relatively fast compared to other lenses and I was impressed with my indoors test shots without flash in low light. In outdoor settings the F-stop can be slightly higher for added depth of field without compromising shutter speed. The manual focus works well and the infinity stop is just soft enough to be noticed without creating additional camera shake when speed is of the essence. I find that the infinity setting works for most situations unless i’m shooting very close in and all my test shots came out clean and crisp. So much for the full frame review. When mounted on cameras with a C-sized sensor the lens converts into a 22.5mm prime lens with all the afore mentioned attributes. To put it into words everyone can understand: I received two lenses for the price of one. I give the lens 5 stars all the way for the price I paid and for what I use it.


Your comment

Your email address will not be published. Required fields are marked *

Reviews & More

The Irix 15mm f/2.4 lens is a powerful photographic tool.
This new lens from Irix lifts the performance for such lenses way beyond the first early 1970s offerings and gives us a lens that is free from flare, and very sharp. This Swiss design is an excellent one, built in Korea to very high standards.


The Irix 15mm f/2.4 is an excellent super-wide-angle prime lens that delivers very good image quality. Sharpness in the centre of the frame is excellent throughout the aperture range, even wide open at f/2.4, with f/4-f/11 producing the best results.

Digital Rev

I was incredibly surprised at the quality of the Irix and can easily say it is an excellent lens. Both of the “Firefly” and “Blackstone” versions are optically and mechanically sound. Their sharpness is fantastic, with distortion and vignetting very well controlled. There are no problems with chromatic aberration, and ghosting and flare are are kept in check.
I really hope that Irix produce more lenses like this in future.

Dustin Abbott

The Irix Blackstone 15mm f/2.4 represents a great value for landscape (and even architectural) photographers on a budget, and, if you don’t mind a less pro-grade (Blackstone) build, the Firefly version can be had for under $500 USD while delivering an identical optical performance.
There’s a lot to like here, and I look forward to seeing what Irix has to offer in the future.

Ken Rockwell

It may be the sharpest fixed ultra-ultrawide lens I've ever tested.
It's ultrasharp and contrasty and devoid of spherical aberration and lateral color throughout the whole image even wide-open at f/2.4. (...)
If you're in the market for a fixed 15mm ultra ultrawide, this is probably your best buy.

Christopher Frost Photography

Solid quality and handy features. A nice sharp lens which gives you punchy images without too much distortion.
A classy, professional piece of kit for full-frame camera users at an affordable price so it comes recommended.

Digital Camera World

The Irix 15mm combines impressive handling and build quality with superb image quality, at a bargain price.


If you're a landscape photographer, particularly if you shoot a lot of night skies or in low light conditions, then this would be a great lens for you. I'm telling you, the lock focus ring makes night shoots so incredibly smooth.

The Digital Picture

For the price, its value is easy to recognize. Getting a weather-sealed aluminum-magnesium lens barrel with decent image quality for a relatively low price puts this lens squarely on the consideration list. And for a new lens manufacturer, that is an impressive feat.

Outdoor Photographer

Considering the lens as a whole—construction, design, optical performance and price—we like the Irix 15mm f/2.4 Blackstone. It’s a great value for photographers wanting to add an ultra-wide option to their kit but who aren’t able to justify paying three times (or more) of the Blackstone’s price for the first-party lens options.

Andy Astburys' Photography Blog

I will conclude my review of this lens on my return from the land of the Vikings, but suffice to say, at the moment I consider possession of this lens a complete NO-BRAINER.