Irix Lens 11mm f/4 Firefly for Pentax
  • Irix Lens 11mm f/4 Firefly for Pentax
  • Irix Lens 11mm f/4 Firefly for Pentax
  • Irix Lens 11mm f/4 Firefly for Pentax

Irix Lens 11mm f/4 Firefly for Pentax

$620.00

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

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

Irix Lens 11mm f/4 Firefly for Pentax

Irix Lens 11mm

$620.00
Quantity :
Available

Whether you’re a professional photographer looking for a lens for your next shoot, or an amature looking for to expand your lens set, this one’s for you.

The Irix 11mm f/4.0 is an ultra-wide-angle lens created for your full frame (35mm) camera. 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.

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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.

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Firefly is the standard version equipped with three rubber seals that protect camera mount and focusing mechanism against dust, moisture and side accidental water splashes. Ergonomic focusing ring with rubber grip offers the freedom to operate with the camera. It is the most lightweight lens in its class.

Additional Features

  • Infinity click – Enables quick, easy, and precise focusing. During focusing, you’ll feel the moment when your lens hits infinity, which is extremely useful when shooting in difficult lighting conditions (I.e. at night).
  • Focus Lock – Allows you to lock the focusing ring in a specific position, which is extremely beneficial when you want to keep a specific focus plane, i.e. for astrophotography, or when using the hyperfocal scale.
  • Focus Calibration Window – due to the specifics of focus detection in DSLR cameras (which are based on phase detection), sometimes it may happen that the lens needs synchronization with the camera. Thanks to this special window you can easily calibrate the lens at home using basic tools within 5 minutes. Fast, simple and effective!
  • Rear Gel Filter Slot – Allows the use of neutral gray filters, (a unique feature of the Irix 11mm f/4.0), against the background of competing ultra-wide-angle builds that do not have the option of using filters.
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Kit includes:

  • Irix 11mm f4 Firefly for Pentax
  • lens hood
  • front lens cap
  • 2 rear lens caps
  • soft lens pouch
  • metal box

Frequently Asked Questions (FAQ)

Here you will find answers to the most frequently asked questions about our products.

What are the main features of the Irix 11mm f/4 Firefly lens?
The Irix 11mm f/4 Firefly is an ultra-wide-angle prime lens that offers an impressive field of view. Its features include manual focus, low distortion, and high-quality construction from durable, yet lightweight materials. Read more...
Is the Irix 11mm f/4 Firefly lens compatible with all Pentax cameras?
The lens is compatible with Pentax full-frame and APS-C DSLRs with an K mount. When using with APS-C cameras, the crop factor should be considered, which changes the effective focal length of the lens. Read more...
What applications are best suited for the Irix 11mm f/4 Firefly lens?
Due to its ultra-wide perspective, the lens is ideal for landscape photography, architectural photography, and other situations where capturing expansive scenes or spaces is desired. Read more...
Does the lens have image stabilization?
No, the Irix 11mm f/4 Firefly does not have built-in image stabilization. When shooting in difficult lighting conditions or with slow shutter speeds, the use of a tripod is recommended. Read more...

Data sheet

Mount
Pentax K
Type
wideangle
Focal length
11mm
Focal lenght type
prime
Filter diameter
not applicable
Apreture blades count
9
Maximum aperture
f/2.4
Minimum aperture
f/22
Sensor size
FF, FX
Lens composition
11 elements in 9 groups
Minimum focusing distance
0.27m
Focus type
manual
Stabilization
no
Size (mm)
118 x 103mm
Weight (kg)
0.83
Weather sealing
3 rubber o-rings
Focus ring distance scale
metric
Rear gel filter slot
30 x 30mm
Series
Firefly
Focus ring rotation
140
Distortion
'-3.13%
Angle of view (degrees)
126⁰
Magnification ratio
0.08
WHAT IS THE FIELD OF VIEW FOR THE IRIX 11MM F/4 FIREFLY LENS?
The Irix 11mm f/4 Firefly lens offers an ultra-wide 126-degree field of view.
WHAT TYPE OF CAMERAS IS THIS LENS COMPATIBLE WITH?
Yes, this lens is designed for full-frame (35mm) cameras but is fully compatible with APS-C sensor cameras as well, making it versatile across different camera bodies with a Pentax K mount.
IS THE IRIX 11MM F/4 FIREFLY WEATHER-SEALED?
Yes, this lens features a superb weather-sealed construction that protects it against moisture, dust, and sand, making it suitable for challenging conditions.
WHAT ARE THE APERTURE DETAILS OF THIS LENS?
It has a fast f/4.0 aperture and includes 9 rounded aperture blades to enhance image quality across the entire frame.
CAN THE IRIX 11MM F/4 FIREFLY LENS BE USED WITH BOTH FULL-FRAME AND APS-C CAMERAS?
Yes, this lens is designed for full-frame (35mm) cameras but is fully compatible with APS-C sensor cameras as well, making it versatile across different camera bodies with a Pentax K mount
WHAT ARE THE DIFFERENCES BETWEEN THE FIREFLY AND BLACKSTONE VERSIONS OF THE IRIX 11MM F/4 LENS?
The Firefly version features a lightweight composite construction with a textured rubber focus ring for smooth operation and comes with a soft pouch. The Blackstone version offers a more robust, entirely metal construction with engraved UV-reactive markings aiding in low-light settings and is supplied with a hard case.
WHAT IS THE MINIMUM FOCUSING DISTANCE OF THE LENS?
The minimum focusing distance of the Irix 11mm f/4 is only 28cm, allowing for close-up shots with wide perspectives.
DOES THE LENS SUPPORT ANY SPECIAL FOCUSING FEATURES?
The lens includes an infinity click feature for precise infinity focusing and a focus lock to maintain a specific focus setting, useful in astrophotography or when using the hyperfocal scale.
WHAT KIND OF OPTICAL DESIGN DOES THIS LENS HAVE?
It consists of 16 elements in 10 groups, including 4 refractive elements, 2 ED elements, and 3 aspherical elements, to ensure sharp, high-quality images.
ARE THERE ANY FILTER OPTIONS AVAILABLE WITH THIS LENS?
The lens features a rear gel filter slot, enabling the use of neutral gray filters, which is a unique feature among ultra-wide-angle lenses.
HOW DURABLE IS THE LENS CONSTRUCTION?
The Firefly version has a lightweight composite build with a rubber focus ring, whereas the Blackstone version boasts a reinforced full-metal construction with engraved markings.
WHAT ACCESSORIES ARE INCLUDED WITH THE LENS?
The Firefly version comes with a soft pouch, while the Blackstone version includes a hard case.
HOW DOES THE LENS COMMUNICATE WITH THE CAMERA?
It includes a module that allows control of the lens' aperture directly from the camera, supporting semi-automatic modes (PASM) and recording data in EXIF format.
IS THERE ANY SUPPORT FOR FOCUS CONFIRMATION?
Yes, the lens has a focus confirmation system that indicates the correct focus through an icon in the viewfinder or a sound.
CAN I CALIBRATE THE FOCUS OF THIS LENS?
The lens features a focus calibration window, enabling users to calibrate the lens at home using basic tools within minutes, ensuring accurate focus detection.

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"Das Irix 11mm f/4 ist ein ausgezeichnetes Ultra-Weitwinkel-Objektiv, das eine sehr gute Bildqualität liefert. Die Schärfe in der Mitte des Bildes ist über den gesamten Blendenbereich ausgezeichnet, selbst weit offen bei f/4, ebenso wie die Ränder, wobei f/5.6-f/11 die besten Ergebnisse erzielen. Das Irix 11mm f/4 macht dank seiner hervorragenden Verarbeitungsqualität, des reibungslosen Fokusrings und der Hyperfokal-Skala viel Freude." Vollständige Rezension lesen

"Was für ein aufregendes Objektiv das Irix 11mm f/4 Firefly ist. Es eröffnet eine ganz neue Welt kreativer Möglichkeiten in einem gut gemachten, gut gestalteten Paket, das die Bildqualität liefert. Es wird vielleicht nicht für jedermann sein, vielleicht wegen des ultra-weiten Stils der Bilder oder vielleicht wegen Schwierigkeiten bei der Verwendung des manuellen Fokussystems, aber wenn das Objektiv die kreative Vorstellungskraft des einzelnen Fotografen anspricht, wird es eine lohnende Erfahrung sein." Vollständige Rezension lesen

"Das Irix 11mm f/4 Blackstone ist ein gut verarbeitetes und preisgünstiges Ultraweitwinkel-Objektiv für Vollformat-Canon, Nikon und Pentax DSLRs. Die Bildqualität und Handhabung sind sehr gut, aber wenn unser Testmuster etwas aussagt, müssen Sie möglicherweise einige Belichtungskorrekturen vornehmen, um die ungenaue Blendensteuerung des Objektivs auszugleichen." Vollständige Rezension lesen

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"Stadt-, Immobilien- und Landschaftsfotografen, die nach der weitesten möglichen Brennweite ohne Fischaugeneffekt suchen, werden von diesem Produkt begeistert sein." Vollständige Rezension lesen

"Irix hat ein ansprechendes Stück gut gestalteter Ultraweitwinkel-Objektive entwickelt. Aktuell ist es das weiteste rektilineare Objektiv auf dem Markt, das gute Schärfe, sehr kontrollierte Menge an Verzerrung bietet - und das alles in einem Gehäuse, das perfekt wetterfest ist (Blackstone-Version) und darauf ausgelegt ist, den Fotografen zu überdauern." Vollständige Rezension lesen

"Dies ist ein schön gebautes und attraktiv gestaltetes Objektiv, das einfach zu bedienen ist und bei einem Schnäppchenpreis eine gute Bildqualität liefert. Dieses Objektiv könnte das ideale Geschenk für einen Fotografen sein, der scheinbar alles hat." Vollständige Rezension lesen

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"Die Bildqualität ist selbst bei maximaler Blendenöffnung sehr gut; durch Abblenden verbessert sich die Qualität bis f/11. Das Irix Firefly 11/4 bietet eine gute Bildqualität und Funktionen in seiner Preisklasse (ca. 600€ in Finnland), und Funktionen wie "Fokus sperren" und "Unendlich-Klick" machen es zu einem soliden Performer." Vollständige Rezension lesen

"Im Laufe der Jahre konnte ich verschiedene Objektive testen, heute kann ich dank meiner Erfahrungen sagen, dass das IRIX 11mm Blackstone ein großartiges und einzigartiges Objektiv ist!" Vollständige Rezension lesen

"Wenn Sie das IRIX 11mm f4 Blackstone-Objektiv verwenden, werden Sie feststellen, dass es ziemlich schwierig ist, damit ein schlechtes Foto zu machen. Wie so ziemlich jedes Objektiv auf dem Markt bietet es eine gute Bildqualität und es gibt sehr wenig, was man ihm in Bezug auf die Bildqualität vorwerfen kann." Vollständige Rezension lesen

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"Das Irix 11mm ist ein vollständig manuelles Objektiv. Sein Fokussierring ist groß, gut gedämpft und fließend. Sein Bereich ermöglicht präzise Einstellungen bei kurzen Entfernungen und einfache Korrekturen bei längeren Entfernungen." Vollständige Rezension lesen

"In Bezug auf die Bildqualität war ich angenehm überrascht von der optischen Leistung dieses Objektivs. Die Schärfe in der Mitte ist selbst bei den weitesten Einstellungen sehr gut, während die Auflösung in den Ecken bei f/5.6 deutlich verbessert wird. Es gibt ein wenig Vignettierung und chromatische Aberration bei f/4, aber sie nehmen auch ab, wenn man die Blende schließt." Vollständige Rezension lesen

Information Required by the General Product Safety Regulation (GPSR)

Manufacturer: TH Swiss AG
Rathausstr 14 Postfach 1557, Baar 6341, Switzerland
irixlens.com

Responsible Entity in the EU: Next77 sp. z o.o.
ul. Bonarka 11, 30-415 Kraków
www.next77.pl

For inquiries, please contact: gpsr@next77.pl

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