no compromises
15mm f/2.4
stay wide awake
15mm f/2.4
see it with the Irix lens
innovative technology
tied up in a neat design
for the most demanding

Have you ever had the dilemma of choosing between the newest technology and the most classical design? The Irix Blackstone 15mm f/2.4 prevents such an issue.

Classic design meets maximum functionality, achieving the perfect match of innovative technology. The durable aluminium and magnesium body ensures foolproof protection of your lens, even in extreme conditions. Engraved fluorescent markings enable easy operation in all lighting conditions to facilitate the perfect photo.

makes for
a lightweight journey

The same optical performance and high quality mechanism as the Blackstone, but implemented in a lightweight and handy design. Whether you sail, hike, drive or fly, the Irix Firefly 15mm f/2.4 will make your journey extraordinary.

The ergonomic focusing ring offers the freedom to capture the most ideal moment, whether it is big city architecture or wildlife scenery. Challenge accepted.

we appreciate beauty
in every detail
focusing ring
Al-Mg body
fluorescent markings
Version of the lens Firefly Blackstone
Housing material lightweight type plastic. 12% weight saving aluminium-magnesium alloy, premium finish
Housing outer finishing standard anti-scratch
Focusing ring material anti slip coating all-metal anodized ring with grooved surface
Method of applying markings printed engraved
Type of paint used for markings standard UV light reacive paint
front lens element no yes
focus lock ring yes
focusing ring yes
camera mount yes
Protective case included soft lens pouch hard lens case
retaining ring
The retaining ring of the frontal lens is free from engraving, printing or any other form of marking. This therefore prevents unwanted internal reflections when using high density filters.
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95mm front filter thread
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neutrino coating
Thanks to sophisticated optical construction and special neutrino coatings, colour aberration, ghosting and flare effects have been reduced to the absolute minimum.
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focus lock
get more focused
with focus lock
You can lock the focus ring at any time securing the setting that you choose. Precision, comfort and ingenious solutions.
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infinity click
and hyperfocal scale
we have mastered infinity
to the limits
The hyperfocal distance scale simply and intuitively gives information about accessible range for depth of field for a given aperture. When the ring is set in the “infinity” position, there is a noticeable “click”, making it easier to find the value without looking. Now you can fix your eyes on the image and concentrate on the composition.
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electronic aperture control
Available camera mounts:
Canon EF, Nikon F and Pentax K
focus calibration
ultimate precision
to sharpen your imagination
We have made every effort to ensure that each lens leaving the factory has been properly calibrated. However, for your comfort Irix lens provides you the unique opportunity to calibrate the lens for a particular model of your camera.
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rear gelatin filter slot
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born to be wide and precise
resistant to extreme conditions

Irix lenses are made with extreme precision. Each Irix lens is equipped with a weather sealed construction that protects the interior against dust and moisture. Thanks to inner seals, our lenses are also protected from accidental water splashes.

we appreciate beauty in every detail

Despite the short focal length and large aperture, we provide not only a front filter thread with a window in the petal-shape lens hood, but we also add a rear gelatin filter slot to give you even many more options in image creation.

personalize your view
9 blades aperture mechanism
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  • Aspherical
  • High Refractive
  • Extra-low Dispersion
Image size 35mm „Full Frame”
Focal length 15 mm
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 95 x 1.0 mm
Rear gelatin filter slot 30 x 30 mm
Available mounts Canon EF, Nikon F, Pentax K
Dimensions (DxH) 114 x 100 mm (4.49” x 3.94”)
weight Firefly Canon 608 g (1.34 lbs)
Nikon 581 g (1.28 lbs)
Blackstone Canon 685 g (1.51 lbs)
Nikon 653 g (1.44 lbs)

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