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Irix Lens 11mm f/4 Firefly for Pentax
€249.75 €555.00 Save 55%Lowest price within 30 days before promotion: €249.75The 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
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.
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.
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.
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)Find answers to the most frequently asked questions about the Irix 11mm f/4 Firefly lens for Pentax K.
1. Which cameras is the Irix 11mm f/4 Firefly for Pentax K compatible with?The Irix 11mm f/4 Firefly for Pentax K is designed for Pentax K-mount DSLR cameras, including full-frame and compatible APS-C bodies. On APS-C cameras, the field of view will be narrower due to the crop factor.2. What type of photography is the Irix 11mm f/4 Firefly best suited for?The Irix 11mm f/4 Firefly is especially well suited for landscape, architecture, interiors, real estate, night sky and creative ultra-wide-angle photography. Its 11mm focal length and 126-degree field of view make it ideal for capturing expansive scenes and dramatic perspectives.3. Does the Irix 11mm f/4 Firefly have autofocus?No. The Irix 11mm f/4 Firefly is a manual focus lens. Thanks to electronic communication with the camera, it supports focus confirmation and offers precise manual focusing with Focus Lock and Infinity Click features.4. What is the Focus Lock function used for?Focus Lock allows you to lock the focus ring in a selected position. This is useful when working with a fixed focus distance, the hyperfocal scale, landscape photography or astrophotography.5. What is the Infinity Click mechanism used for?The Infinity Click mechanism helps you quickly and precisely find the infinity focus position, which is especially useful for night photography, landscapes and astrophotography.6. Is the Irix 11mm f/4 Firefly weather-sealed?Yes. The lens features weather-sealed construction that helps protect it against dust, moisture and accidental splashes, making it suitable for outdoor work in more demanding conditions.7. What is the aperture range of the Irix 11mm f/4 Firefly?The lens has a maximum aperture of f/4 and a minimum aperture of f/22. It also features a 9-blade rounded aperture design.8. What is the minimum focusing distance?The minimum focusing distance of the Irix 11mm f/4 Firefly is 0.27 m / 27 cm, allowing close-up shots with an ultra-wide perspective.9. What is the optical construction of the lens?The lens consists of 16 elements in 10 groups, including 4 high refractive elements, 2 ED elements and 3 aspherical elements. This optical design helps deliver sharp images with low distortion for an ultra-wide-angle lens.10. Can filters be used with the Irix 11mm f/4 Firefly?Yes. The lens has a rear gel filter slot for 30 x 30 mm gel filters. Due to its ultra-wide-angle optical design, it does not use a standard front screw-in filter thread.11. Does the lens communicate with the camera?Yes. The lens supports electronic communication with the camera body, including aperture control from the camera, focus confirmation, semi-automatic PASM modes and EXIF data recording.12. Can the focus of this lens be calibrated?Yes. The lens features a Focus Calibration Window, which allows the focus scale to be adjusted using basic tools if fine-tuning is needed.13. What is the difference between the Firefly and Blackstone versions?Both versions share the same optical design. The Firefly version is lighter and uses a durable composite construction with a rubberized focusing ring. The Blackstone version has a more robust aluminium-magnesium body, engraved fluorescent markings and a more premium finish.14. What accessories are included with the Irix 11mm f/4 Firefly?The Firefly version includes the lens hood, front lens cap, two rear lens caps, a soft lens pouch and a metal box.
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
- 16 elementos en 10 grupos
- 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
"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
"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
"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
"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
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