ARRI Signature Prime 18 mm/T1.8 KK.0019189

£21,181.00 Ex. VAT £25,417.20 Inc. Vat

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The ARRI Signature Prime range is the first cine lens series to feature machined magnesium lens barrels, making the optics incredibly lightweight and robust.

They are also the first to incorporate ARRI’s next-generation LDS-2 Lens Data System, with high data rates and absolute encoders for fast initializing. LDS-2 extends the possibilities of lens data and is being licensed to other lens and camera manufacturers.

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ARRI Signature Prime 18/T1.8 KK.0019189

ARRI Signature Prime 18/T1.8 KK.0019189

Accompanying the ALEXA LF camera are 16 large-format ARRI Signature Prime lenses, ranging from 12 mm to 280 mm and fitted with the ARRI LPL mount. While the Signature Primes exemplify state-of-the-art optical precision, they have been designed to render organic, emotionally engaging images, gently softening and texturizing the large format with natural skin tones and creamy bokeh. A fast T-stop of T1.8 facilitates shallow depth of field and the smooth focus fall-off gives subjects heightened presence in the frame.

The 18mm ARRI Signature Prime T1.8 (Feet) is a wide-angle lens in an array of large-format primes featuring organic images, attractive bokeh, and a fast T1.8 aperture for achieving shallow depth of field. This prime lens gently softens the large-format look, and produces pleasant, natural skin tones. Focus falls off smoothly, highlighting your subject against its background frame. This LPL-mount lens features ARRI LDS-2 lens-data compatibility for speedy lens setups, and high lens metadata rates.

Designed for use with full-frame, large-format sensors, the versatile ARRI Signature Primes also cover Super 35. Dedicated LF Open Gate, and Super 35 Open Gate magnetic format masks enable you to switch between formats, and are included with the lens. Stockings, nets, and voile can be used for diffusion when mounted in the Signature Prime’s rear net holder. Eleven iris blades produce smooth, rounded bokeh effects, and a telecentric design minimizes breathing. The LDS-2 lens data system is backwards-compatible with ARRI’s LDS-1, and communicates with Cooke’s /i Technology.

Constructed with magnesium housings and aluminum gear rings, each Signature Prime is lightweight, water-resistant, and features focus marks in feet. Anti-reflective coatings, light baffles, and light traps help to minimize any internal barrel flare. Should a stunt go awry, or your camera rig be otherwise damaged, the front and rear lens elements of the lens are easily replaceable at an ARRI service center. The18mm ARRI Signature Prime focuses down to 5.1″ from the lens front, and features a light weight of 4.4 pounds, and a compact length of 7″.

Additional information






Focal Length18mm
Lens MountARRI LPL
FormatFull Frame
Image Circle44.7 mm
Maximum T-StopT1.8
Minimum T-StopT22
Diagonal Angle of ViewARRI LF Open Gate: 102.6°
Horizontal Angle of ViewARRI LF Open Gate: 91.4°
Minimum Focus DistanceFrom : 13.78″ / 0.35 m
Iris Blades11
Gear MOD & PitchFocus: 0.8 MOD / 32 Pitch
Iris: 0.8 MOD / 32 Pitch
Zoom: 0.8 MOD / 32 Pitch
Front Diameter114 mm
Filter ThreadNone
Focus ScalesImperial
Electronic CommunicationYes
Maximum Magnification Ratio1:9.2
Tripod Mounting ThreadNone
Dimensions (W x H)4.53 x 4.53″ / 115.06 x 115.06 mm
Length7.01″ / 178.05 mm
Weight4.41 lb / 2 kg
Packaging Info
Package Weight14.695 lb
Box Dimensions (LxWxH)16 x 14.9 x 12″


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1 x ARRI Signature Prime 18 mm/T1.8 KK.0019189


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ARRI Signature Prime 18 mm/T1.8 KK.0019189

£21,181.00 Ex. VAT £25,417.20 Inc. Vat

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