The award-winning Cooke S4 prime lenses were designed and developed in close technical collaboration with industry professionals. They are colour matched and compatible with Cooke zooms, 18-100mm T3.0 and 25-250mm T3.7, 15-40mm, T2.0 CXX and SK4 16mm lenses.

Cooke S4 optics deliver superb optical and mechanical performance, control of flare, distortion, stray light and spherical aberrations at full aperture. The cam focus mechanism allows for smooth adjustments. Modular construction facilitates servicing and maintenance.

Technology

Since February 2005, all our S4 prime lenses (and the CXX zoom) have been equipped with /i technology. S4/i lenses are designed for all professional film and electronic cameras with PL mount. The /i technology provides cinematographers and camera operators with essential information on lens settings, focus distance, aperture and depth of field, hyperfocal distance, serial number, owner data, lens type and focal length in both metric and feet measurements. For zooms, the zoom position is displayed.

65 Soft Effects Accessory

The 65 Soft Effects is designed for the S4/i 65mm and 75mm lenses (via the Cooke 75mm adapter ring). The accessory design is based on Cooke's PS945 soft focus lens for 4x5 large format photography. See the effect in sample photographs taken with the PS945 lens. The effect is high resolution with a beautiful glow in the highlights -- subtle, but more pronounced at full aperture at T2, becoming less pronounced when stopping down. (Effect from T2 to T4 with the 65mm lens; T2 to T5.6 with the 75mm lens.)

Cooke S4/i Lens Awards

1998 Cinec Technical Excellence Award, Germany
1999 Academy of Motion Picture Arts and Sciences Scientific and Technical Award for optical and mechanical design
2000 Primetime Emmy Award for outstanding achievement in technological development
2001 Two Queen's Awards for Enterprise - International Trade and Innovation, England
2001 Winner, Exporter of the Year, 2001 International Business Award, Export Times and Trade Partners UK
2001 Winner, Product Innovation, 2001 International Business Award, Export Times and Trade Partners UK
2007 NAB2007 Premier Product Award – S4/i System



- Maximum format coverage -- 30mm diameter (Super 35mm format)

- Focus scales -- Two opposing focus scales - metric or feet. Scales graduated from infinity to minimum focus distance.

- Focus gear -- 140 teeth metric module 0.8 x 6.0mm wide x 98mm from image plane. 140 teeth module 0.8 x 6.0mm wide x 99mm from image plane (300mm)

- Iris scales -- Two opposing linear T scales - full and third stop graduations.

- Iris gear -- 134 teeth metric module 0.8 x 4.0mm wide 79.5mm from image plane.

- Front internal filter -- Internal thread for M105 x 0.75 pitch filter adapter (12mm and 14mm not applicable). M120 x 1.0 pitch (150mm). M131 x 1.0 pitch (180mm, 300mm)

Key Features

Optical Design -- The optics are designed to deliver maximum performance at full aperture with superior control of flare, distortion and spherical aberration.

Electronics -- Accessible via the PL mount contacts that synchronise with /i compatible cameras.

Colour Balance -- All S4/i lenses are colour balanced, matched and compatible with Cooke 5/i, miniS4/i and Anamorphic/i.

Aperture -- All S4/i lenses have a true T2 aperture and cover Super 35mm format, with the exception of the 300mm (2.8).

Index Marks -- Each index mark is labelled. More detailed graduations allow for more precise focus control.

Focus Movement -- Our Academy Award®-winning cam focus system, combined with the advantage of a large barrel diameter, has enabled us to increase the number of focus marks, particularly in close focus. Spherical aberration has been controlled across the entire focal range to eliminate compensation for back focus changes with aperture. A four-point contact bearing provides smooth, positive movement without play.

Camera Mounts -- Reinforced Cooke PL mount with /i technology contacts.

Focus Scale -- Large, clear numerals on both sides of the focus barrel assist the focus puller when shooting in difficult lighting conditions. Additionally, the entrance pupil position is engraved on the lens.

Compatibility -- All Cooke S4/i lenses have a common fixed front diameter of 110mm (with the exception of the 12mm, 150mm, 180mm, 300mm) with a 140T x 0.8 mod focus gear and a 114T x 0.8 iris gear

External Finish -- A scratch-resistant PTFE hard-anodised finish is applied to all Cooke lenses, providing a durable and robust surface to meet the most demanding environmental conditions.

Iris -- An eight-blade linear iris assembly is fitted to S4/i lenses with an aperture range from T2 to T22.(Except the 300mm)

Weight/Size Ratio -- The lenses are designed for all types of shooting, including handheld and Steadicam, offering a comfortable balance ratio with the latest compact cameras.

Reliability and Service -- S4/i lenses are designed to meet market demands for reliable performance with minimal downtime.