Irix Lens 11mm f/4 Blackstone for Pentax


The extremely wide-angle, rectilinear manual focus lens designed for DSLR cameras.

Buy Irix 11mm f/4 Blackstone and get 60% discount for SNS-HDR software


Our 11mm lens is an extremely wide Full Frame rectilinear lens with a 126° angle of view. 4 high refractive lenses, 2 ED lenses and 3 aspherical lenses guarantee minimal distortion, as low as 3.13%, making our 11mm f/4.0 lens absolutely unique in its class.


We know how important it is to protect your gear. All Irix lenses are made with phenomenal precision. Each Irix lens is equipped with a weather sealed construction which protects the interior against dust and moisture. Thanks to inner seals, our lenses are also protected from accidental water splashes. No matter the journey, you can be confident that our weather sealed lenses will offer you maximum resistance to the extremes.


Blackstone, the Premium version has durable body made with aluminium-magnesium alloy, that ensures foolproof protection of your lens, even in extreme situations. Its construction is equipped with rubber seals, that protect the camera mount and focusing mechanism against the dust and moisture, as well as front or side accidental water splashes. Engraved fluorescent markings enable easy read-out and operation in low light conditions.


Kit includes:

  • Irix 11mm f4 Blackstone for Pentax
  • lens hood
  • front lens cap
  • 2 rear lens caps
  • soft lens pouch
  • metal box
Series Blackstone
Mount Pentax K
Focal length 11mm
Sensor size full frame
Maximum apreture f/4
Minimum aperture f/22
Filter diameter not applicable
Type wideangle
Apreture blades count 9
Lens composition 16 elements in 10 groups
Focal lenght type prime
Stabilization no
Focus type manual
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