IRIX 11mm f/4 Blackstone Lens for Nikon F

IRIX 11mm f/4 Blackstone Lens for Nikon F

IRIX 11mm f/4 Blackstone Lens for Nikon F


Product Highlights

  • Nikon F-Mount/FX Format
  • Aperture Range: f/4 to f/22
  • Three Aspherical Elements
  • Two ED and Four 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
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Style: Blackstone

Firefly Blackstone

Mount: Nikon F

Canon EF Nikon F Pentax K

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Price: $774.95

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IRIX 11mm f/4.0 overview

  • 1Description

Distinguished by its refined physical construction, the 11mm f/4 Blackstone Lens from Irix is an ultra-wide prime designed for Nikon F-mount DSLRs. As a rectilinear lens, the advanced optical layout makes use of aspherical, extra-low dispersion, and high-refractive index elements to control distortion and aberrations for accurate, and sharp rendering with a high degree of clarity and color accuracy. Additionally, a Neutrino coating has also been applied to the lens to control flare and ghosting for improved contrast when working in strong lighting conditions.

Beyond its optical assets, this 11mm f/4 lens also sports 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 11mm f/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.
Ultra wide-angle prime designed for FX-format Nikon F-mount DSLRs, this lens can also be used on DX models where it provides a 16.5mm equivalent focal length.
Three aspherical, four 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.
Built-in petal-shaped lens hood blocks stray light in order to reduce lens flare, and also protects the front element of the lens.
Rear of the lens accepts 30 x 30mm cut gel filters.
Rounded nine-blade diaphragm contributes to smooth bokeh.
In the Box
IRIX 11mm f/4 Blackstone Lens for Nikon F
  • Front Lens Cap
  • Rear Cap for Nikon F-Mount Lenses drsvxwrsuc
  • Hard Lens Case (Black)
  • Limited 5-Year Warranty
  • Table of Contents
    • 1Description

    IRIX 11mm f/4.0 specs

    Focal Length 11mm
    Aperture Maximum: f/4
    Minimum: f/22
    Camera Mount Type Nikon F
    Format Compatibility Nikon FX/35mm Film
    Angle of View 126°
    Minimum Focus Distance 10.83" / 27.5 cm
    Optical Design 16 Elements in 10 Groups
    Diaphragm Blades 9, Rounded
    Autofocus No
    Filter Thread Rear:
    Dimensions (DxL) Approx. 4.65 x 4.06" / 118 x 103 mm
    Weight 1.74 lb / 790 g
    Packaging Info
    Package Weight 3.2 lb
    Box Dimensions (LxWxH) 6.7 x 5.6 x 5.6"

    IRIX 11mm f/4.0 reviews

    11mm f/4 Blackstone Lens for Nikon F is rated 4.4 out of 5 by 9.
    Rated 4 out of 5 by from A decent complement to a Nikon 14-24, Tamron 15-30, or other First the good:� Survived a snow storm in freezing conditions in Glacier National Park, so I can say it is well-sealed. Solid and relatively smaller and lightweight than any of the zoom. My copy seems to be well centered as well.� Very good flare resistance and nice sun stars at lower apertures.� The bad:� Shows significantly more distortion and softness in the corners than the Nikon or Tamron zooms.� Also this lens is softer at f16 and f22 than the Nikon all over the frame.� However, for Nikon and Pentax, this is the widest of the ultra-wides and certainly much easier to use and transport than the gigantic Canon 11-24mm.� �Tested on a D750...results on others may vary...
    Date published: 2018-01-24
    Rated 4 out of 5 by from Ultra-Mega-Super Wide If you are looking for a super wide angle lens and don't mind manual focusing, this is the lens for you. It tends to be a little softy at the edges but that may be because I am used to the Nikkor 14-24mm sharpness. Great lens overall though!
    Date published: 2017-09-20
    Rated 5 out of 5 by from All the width without the distortion! I just unboxed this lens and grabbed a quick shot in my back yard to check the claims about lack of distortion. My first impression? This thing is WIDE! Second? The claims about distortion are true. You'll see a hint of curvature in the corners, but the lens correction profile for ACR dealt with that perfectly, as well as the tiny bit of vignetting in the corners. I'm impressed. The lens is solid, well-built, sharp and no trouble at all to work with, despite the manual focus. (Focus confirmation works, too.) I can't wait to see how much of the Milky Way I can capture with this beast! This is the widest angle of view I've ever had with my DSLR and absolutely worth the price! It's about time someone combined quality and affordability like this!
    Date published: 2017-11-08
    Rated 5 out of 5 by from Sharp, with little distortion or flare I've been shooting the Irix 11mm for a bit over a month.� I like the perspective it gives compared to stitched shots.� As others note, the manual focus is a non-issue, esp. with the excellent DOF markings and hyperfocal point indicator.� I uploaded two pictures showing the Irix's excellent control of flare - with the sun closer to center, you get a small line of flare dots, with it offset to the far edge of the frame you get only a few, isolated artifacts.� Get the sun out of the frame the flare is non-existent.� Yes, sharpness falls off in the corners.� I can't compare it to the Nikon 14-24, but I don't feel it is any worse than my Nikon 16-35.� What is noticeable is how much farther "out" the corners are with this lens compared to the 16-35.� It's field of view is simply amazing.
    Date published: 2018-03-06
    Rated 5 out of 5 by from The Perfect Ultra Wide Lens for Landscape I ordered the blackstone version of the lens after hearing the positive reviews associated with the lens when it was originally announced several months ago. I have used the lens dozens upon dozens of times since purchasing and I have been nothing short of 100% satisfied.� SHARPNESS/QUALITY: For nature photography this lens provides very sharp images with only the very corners being slightly softer wide open. When stopped down to b/t f/5.6-11 the sharpness is nothing short of perfect at any distance. The distortion and chromatic aberrations produced by the lens are well controlled and less significant than other ultra wide lenses that are far more expensive FOCUS: Focusing is so simple for landscapes as setting the lens to infinity will maintain ideal focus on any object further than 10 ft distance even at f/4. Focus was near perfect when it arrived on my D750 and required no adjustment.� BUILD: The build is top notch and I have no complaints. Feels as tough as any pro level lens. The focus ring is very sturdy and smooth so I have never had the focus slip, I rarely use the focus lock for that reason. Weather proofing is enough to keep rain from penetrating the barrel. I have included an image I took recently with the IRIX 11mm at f/8.
    Date published: 2017-12-16
    Rated 5 out of 5 by from This is a great lens I had the chance to try one of this at PPE in New York a few days ago. I have to say that this is a great lens, extremely wide and without fisheye effect. It's perfect for Real State. I also think it's the widest lens for Nikon Full Frame. I will get one for Christmas.
    Date published: 2017-11-05
    Rated 2 out of 5 by from How hard is it to get focus direction right? If you shoot Canon or Olympus you should be right at home with this lens. If you shoot Nikon or Fuji, you will go nuts trying to remember that the focus is in the wrong direction. That is enough of a deal breaker for me, right there. I wonder, however, how hard it could possibly be to get this sort of detail right?
    Date published: 2017-09-26
    Rated 5 out of 5 by from Useful for many types of work This lens works well with the full frame Nikons, where we are looking for imaging in small spaces or indoors. On the Nikon D4 or Df, I am able to create expansive views. Always make sure that you are using a level or the frame lines in the finder, as you will see what happens if you don't. Built like a tank and balances well on the larger bodies.
    Date published: 2018-02-18
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    Customer Photos

    IRIX 11mm f/4.0 Q&A

    IRIX 11mm f/4.0 accessories

    Designed for use with:

    • Nikon D3200
    • Nikon D3300
    • Nikon D3400
    • Nikon D4s
    • Nikon D5
    • Nikon D500
    • Nikon D5200
    • Nikon D5300
    • Nikon D5500
    • Nikon D5600
    • Nikon D610
    • Nikon D7100
    • Nikon D7200
    • Nikon D750
    • Nikon D7500
    • Nikon D810
    • Nikon D810A
    • Nikon D850
    • Nikon Df
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