IRIX 11mm f/4 Blackstone Lens for Canon EF

IRIX 11mm f/4 Blackstone Lens for Canon EF

IRIX 11mm f/4 Blackstone Lens for Canon EF

B&H # IR11BSC MFR # IL-11BS-EF
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Product Highlights

  • Canon EF-Mount/Full-Frame 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

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Blackstone

Price: $774.95

Instant Savings: $125.00

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You Pay:  $649.95

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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 Canon EF-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 full-frame Canon EF-mount DSLRs, this lens can also be used on APS-C models where it provides a 17.6mm 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 Canon EF
  • Front Lens Cap
  • Rear Cap for Canon EF-Mount Lenses
  • Hard Lens Case (Black)
  • Limited 5-Year Warranty
  • Table of Contents
    • 1Description

    IRIX 11mm f/4.0 specs

    Performance
    Focal Length 11mm
    Aperture Maximum: f/4
    Minimum: f/22
    Camera Mount Type Canon EF
    Format Compatibility 35mm Film / Full-Frame Digital Sensor
    Angle of View 126°
    Minimum Focus Distance 10.83" / 27.5 cm
    Optical Design 16 Elements in 10 Groups
    Diaphragm Blades 9, Rounded
    Features
    Autofocus No
    Physical
    Filter Thread Rear:
    Dimensions (DxL) 4.65 x 4.06" / 118 x 103 mm
    Weight 1.74 lb / 790 g
    Packaging Info
    Package Weight 3.05 lb
    Box Dimensions (LxWxH) 6.7 x 5.6 x 5.6"

    IRIX 11mm f/4.0 reviews

    11mm f/4 Blackstone Lens for Canon EF is rated 3.6 out of 5 by 7.
    Rated 2 out of 5 by from Great packaging! Great build, packaging and the price - VERY IMPRESSIVE. Not that great performance. Major problems: chromatic aberration and distortions. The 11mm coverage also seems way-off as compared to Canon's EF 11-24mm.
    Date published: 2017-07-20
    Rated 3 out of 5 by from Decent for the price I already have the Canon 11-24mm. I got this to try against it. For what you pay it creates okay IQ. In direct comparison tests I shot with tripod/cable/MLU in a library, the Canon wins by a landslide. I would hope for what I paid for the Canon that this would be the case! I returned the Irix.
    Date published: 2017-09-17
    Rated 5 out of 5 by from Beautiful and Solid A very substantial and solidly built piece of glass. Excellent quality. The lens is very sharp with great color and contrast. If you're like me, you may need to work on your focusing skills since it's a manual focus lens. Usually not an issue because infinity covers a huge area in such a wide angle lens. Irix is very proud of their packaging but I found it pretty insubstantial. The can is very flimsy and thin. Not nearly as tough as your average coffee can. B&H might consider packaging this with a little extra padding. UPS, my least favorite carrier, was pretty rough with mine and the can was actually bent. Fortunately, the very nice semi-hard lens case that comes with the Blackstone version did a nice job of protecting the lens. If you need or just want a super wide angle non-fisheye lens, this is a great value.
    Date published: 2017-07-26
    Rated 3 out of 5 by from Quality control issues I wanted to like this lens, but…. 3 stars for image quality 2 stars for quality control/sample variation Note - I was using this lens on an EOS to Sony E-mount converter.�� � I had high hopes for this lens given that I could use it on my 5DmkII and my Sony A7rII using the converter.� An added bonus was that it’s $400 less expensive than the Voigtlander 10mm f/5.6.� However, after going through two copies, I had to return both for a refund. � On my first copy, the corners were absolutely horrible wide open at f4.� Normally, I’d not have high expectations for corners wide open, if not for the results Christopher Frost got in his testing - https://youtu.be/1kFkzA2h8sU�� Note- he reviewed the Firefly, but it’s supposed to have the same optics as the Blackstone.� On his copy, the corner performance at f4 beat what I was seeing at f11 on mine…not even close!� So, I sent my first copy back for an exchange. � My 2nd copy was slightly better than the 1st, but on a flat subjects, or shooting at infinity, the corners still were not great at f11.� What was really going on here was curvature of field, vs. soft corners.� If you focused in the center, the corners were off.�� If you focused in the corners, the center was off.� In “real world” shooting situations, the angle of view of this lens is so wide, that (unless you’re shooting at infinity) nothing will be in the same plane of focus anyway, so this issue was not that big of a deal.� But if Frost’s results are valid, there is sample variation. � The deal breaker for the second copy came this past Tuesday when I pulled it out for a shoot, and noticed that the double-stick tape that holds the front element bezel in place was starting to come loose, and creep-out.� On further inspection, I found that I could finger tighten and loosen the front element!� DONE! � So, looking at all of the reviews, there must be good copies of this lens out there, but if you go for it, be prepared to test it thoroughly, check the assembly, and be prepared to return it. � As for me, I’ll be saving another $400 for the Voigtlander 10mm.
    Date published: 2017-12-15
    Rated 5 out of 5 by from 11mm Blackstone Feels like a tank, great results. A bit heavy on the CA, but easily corrected in Lightroom.
    Date published: 2018-03-26
    Rated 4 out of 5 by from One has to have a lens like that on First: It??s beautifully designed outside. Second: It must be beautifully (Swiss) designed inside because I have never experienced a fisheye lens which does not create curved lines. Straight lines stay 100% straight. I don??t know how they did it. Autofocus is missed but one can get accustomed to it. I use it on a Canon 5DMarkII, on the Sony a7RII, and on the Sony A9 ... both with Metabones adapter.
    Date published: 2017-07-25
    Rated 3 out of 5 by from Quality control issues I wanted to like this lens, but…. 3 stars for image quality 2 stars for quality control/sample variation Note - I was using this lens on an EOS to Sony E-mount converter.�� � I had high hopes for this lens given that I could use it on my 5DmkII and my Sony A7rII using the converter.� An added bonus was that it’s $400 less expensive than the Voigtlander 10mm f/5.6.� However, after going through two copies, I had to return both for a refund. � On my first copy, the corners were absolutely horrible wide open at f4.� Normally, I’d not have high expectations for corners wide open, if not for the results Christopher Frost got in his testing - https://youtu.be/1kFkzA2h8sU�� Note- he reviewed the Firefly, but it’s supposed to have the same optics as the Blackstone.� On his copy, the corner performance at f4 beat what I was seeing at f11 on mine…not even close!� So, I sent my first copy back for an exchange. � My 2nd copy was slightly better than the 1st, but on a flat subjects, or shooting at infinity, the corners still were not great at f11.� What was really going on here was curvature of field, vs. soft corners.� If you focused in the center, the corners were off.�� If you focused in the corners, the center was off.� In “real world” shooting situations, the angle of view of this lens is so wide, that (unless you’re shooting at infinity) nothing will be in the same plane of focus anyway, so this issue was not that big of a deal.� But if Frost’s results are valid, there is sample variation. � The deal breaker for the second copy came this past Tuesday when I pulled it out for a shoot, and noticed that the double-stick tape that holds the front element bezel in place was starting to come loose, and creep-out.� On further inspection, I found that I could finger tighten and loosen the front element!� DONE! � So, looking at all of the reviews, there must be good copies of this lens out there, but if you go for it, be prepared to test it thoroughly, check the assembly, and be prepared to return it. � As for me, I’ll be saving another $400 for the Voigtlander 10mm.
    Date published: 2017-12-15
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