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Irix 15mm f/2.4 Blackstone Lens for Nikon F

Model: IL-15BS-NF

Irix Warranty - USA Version
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Specifications

Physical

Weight 1.51 lb (685 g)
Filter Thread Front: 95 mmRear Gel:
Dimensions (DxL) Approx. 4.49 x 3.94" (114 x 100 mm)

Performance

Format Compatibility Nikon FX/35mm Film
Angle of View 110°
Minimum Focus Distance 11.02" (28 cm)
Elements/Groups 15/11
Diaphragm Blades 9, Rounded
Focal Length 15mm
Aperture Maximum: f/2.4Minimum: f/22
Camera Mount Type Nikon F

Packaging Info

Package Weight 2.65 lb
Box Dimensions (LxWxH) 7.9 x 6.0 x 5.7"

Features

Autofocus No
Expert Reviews
Pentaxforums.34752457
11 June 2018
7.7/10

Irix made a splash when they launched the 15mm F2.4. With its wide angle, fast aperture, claims of high optical performances and, most importantly, support for Pentax's K-mount, it drew the attention of many.

  • +

    Excellent build quality, in particular for the Blackstone version, Lots of information, adjustments and controls on barrel, make usage easier, Pleasing bokeh, especially highlights, Good sharpness at medium apertures, No trace of chromatic aberration, Good manual focus, Capable of creating beautiful...

  • -

    Dramatic vignetting on full frame, Flare present and obvious at all times, Soft corners at wider apertures, general softness at smaller apertures, Important distortion, Decentering issues

The digital picture.34755376
20 March 2017

While reviewing this lens, I was not being overwhelmingly convinced of its value proposition. But, when I started putting the Irix 15mm f/2.4 Blackstone Lens up against the comparables, I began to see it in a different light.

The phoblographer.34645560
16 November 2017

Some of these features have never been done by any manufacturer and it gives Irix quite an edge. For this reason, the Irix 15mm f2.4 Blackstone is surely worthy of our highest praise.

Lenstip com.34355424
27 September 2016

Undoubtedly the constructors of the Samyang 14 mm f/2.8 ED AS IF UMC, compared to the constructors of the Irix, took the easy way out. Firstly, they gave up on any distortion correction, a reprehensible practice in any case.

  • +

    Solid, sealed casing with an interesting design,, Sensational image quality in the frame centre,, Good image quality on the edge of the APS-C sensor,, Imperceptible longitudinal chromatic aberration,, Low lateral chromatic aberration,, Lack of distinct problems with spherical aberration,, Noticeably...

  • -

    Monstrous vignetting on full frame,, Weak performance against bright light.

User Reviews
22 November 2017
10/10

I recently received this Irix 15mm lens. Most of the reviews I've read give this high marks. In spite of this I was surprised, once I started to take photos, just how sharp the images were. I am very satisfied with this.There is the issue of the focus ring not being calibrated; mine is spot on.

17 June 2019
10/10

Absolutely love this lens, super sharp on the Pentax K1ii and really easy to focus. Was not to sure about this or the 11mm but decided on the 15mm as I thought the 11mm would be to wide and am glad I decided in the 15mm..especially since it accepts filters.

23 April 2017
10/10

This lens does everything that I expected it to do for a ultra wide lens. Very sharp when stopped down to 5.6 especially for such a wide angle lens. This lens is large, you'll need to make space in your camera bag went's not mounted on the camera

12 August 2017
10/10

I am an amateur photographer. Bought the lens while on vacation in Glacier/Banff. Works perfectly on my Pentax K3. It is a very large lens, especially compared to the Pentax 21mm. Build quality is very tight. Form, fit and function is very good.

2 July 2017
10/10

The Irix 15mm Lens Is a monster on my Petax K1. Im very Happy with My Night Photography. I Cant wait to try the 11MM.

Product Highlights
  • Nikon F-Mount/FX 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
7.7/10
Average Expert Score
9.0/10
Average User Score
In The Box
  • IRIX 15mm f/2.4 Blackstone Lens for Nikon F
  • 95mm Front Lens Cap for 15mm f/2.4 Blackstone or Firefly
  • Rear Cap for Nikon F-Mount Lenses
  • Lens Hood for 15mm f/2.4
  • Hard Lens Case (Black)
  • Limited 5-Year Warranty
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