SKU: 84389420839

IRIX 15mm f/2.4 Blackstone Lens for Pentax K

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Description

IRIX 15mm f/2.4 Blackstone Lens for Pentax KPentax K Mount Full Frame Format Aperture Range: f 2. 4 to f 22 Two Aspherical Elements Two ED and Three HR Elements Neutrino Coating Manual Focus Design with Focus Lock UV Fluorescent Engraved Markings Depth of Field and Focus Distance Scales Weather Sealed Magnesium Alloy Housing Rounded Nine Blade Diaphragm Offering a wide angle perspective, and characterized by its premium exterior build, the 15mm f 2. 4 Blackstone Lens from Irix is a

  • Pentax K-Mount/Full-Frame Format
  • Aperture Range: f/2.4 to f/22
  • Two Aspherical Elements
  • Two ED and Three HR Elements
  • Neutrino Coating
  • Manual Focus Design with Focus Lock
  • UV Fluorescent Engraved Markings
  • Depth of Field and Focus Distance Scales
  • Weather-Sealed Magnesium Alloy Housing
  • Rounded Nine-Blade Diaphragm

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 Pentax K-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 Pentax K-mount DSLRs, this lens can also be used on APS-C 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.
Performance
Focal Length 15mm
Aperture Maximum: f/2.4
Minimum: f/22
Camera Mount Type Pentax K
Format Compatibility 35mm Film / Full-Frame Digital Sensor
Angle of View 110�
Minimum Focus Distance 11.02"�(28 cm)
Elements/Groups 15/11
Diaphragm Blades 9, Rounded
Features
Autofocus No
Physical
Filter Thread Front: 95 mm
Rear Gel:
Dimensions (DxL) Approx. 4.49 x 3.94" (114 x 100 mm)
Weight 1.51 lb (685 g)
Packaging Info
Package Weight 3.0 lb
Box Dimensions (LxWxH) 6.8 x 5.6 x 5.5"
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 84389420839

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KadeeH
Chelsea, US
★★★★★ 5
Great shelves
Color: A. Black - Universal Classic Style, Number Of Shelves: 3, Size: 22.5inches
Easy to hang and look great in my office. I love the little divot along the edge. Helps to keep pictures from sliding.
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Reviewed in the United States on May 29, 2026
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Crystal
Battle Creek, US
★★★★★ 5
Exactly what I needed for my bathroom refresh.
Color: B. Rustic Brown - Americana Farmhouse Style, Number Of Shelves: 2, Size: 22.5inches, Color: B. Rustic Brown - Americana Farmhouse Style, Number Of Shelves: 2, Size: 22.5inches
I bought these floating shelves in the color Rustic Brown to replace a bulky storage shelf that was making my bathroom feel cramped, and they completely transformed the space. The wood finish looks much more expensive than I expected, and once installed they gave the bathroom a clean, modern, spa-like feel without taking up visual space. Installation was straightforward overall. I mounted one screw in the center into a stud and used drywall anchors for the remaining hardware, and the shelves feel very sturdy. They sit flush against the wall and don’t sag or wobble. I especially love how slim they are while still being deep enough to hold everyday bathroom items, decor, candles, skincare, and small baskets. The color worked perfectly with my bathroom vanity and mirror trim, and the floating design instantly made the room look more organized and intentional. Huge upgrade for a small space. Definitely recommend if you want functional storage that also looks elevated and minimalist.
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Reviewed in the United States on May 30, 2026
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Amazon Customer
Fort Morgan, US
★★★★★ 4
Good Shelves
Color: B. Rustic Brown - Americana Farmhouse Style, Number Of Shelves: 3, Size: 22.5inches
These shelves are really nice quality and look as advertised. The hardware included was great quality, metal drywall anchors and good screws. They were easy to install, and make even/level with each other. My only gripe is the price, but I'm very satisfied with the product overall.
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Reviewed in the United States on April 12, 2026
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Patricia G.
Waukegan, US
★★★★★ 5
Attractive, easy to install, nicely equipped hardware package.
Color: B. Rustic Brown - Americana Farmhouse Style, Number Of Shelves: 2, Size: 22.5inches
These are pretty doggone nice shelves and I appreciate the fact that they are not made of solid particle board. Yes they are made of an engineered product, but they are lightweight and strong…and look better than particle board products and more costly than their actual price. Easy installation system with the bracket…not fussy like some are. An especially thoughtful touch is the variety of hardware that is included. Also a tiny level for use when installing them. What? …So they can be installed correctly? I was pleasantly surprised by this inclusion.
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Reviewed in the United States on May 29, 2026
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Sara
West Palm Beach, US
★★★★★ 5
Beautiful shelves
Color: B. Rustic Brown - Americana Farmhouse Style, Number Of Shelves: 2, Size: 22.5inches
Great quality shelves, have them in 4 rooms, they are easy to hang up and lightweight, look really nice and keeps room looking organized and clean.
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Reviewed in the United States on May 24, 2026

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