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 18-100mm T3.0 and 25-250mm T3.7 zoom lenses, 15-40mm, T2.0 CXX and 16mm SK4 lenses.

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

Technology

Since February 2005, all our S4 prime lenses (and the CXX zoom lens) have been equipped with /i technology. S4/i lenses are designed for all professional PL mount film and electronic cameras. /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 metric and feet measurements. For zoom lenses, zoom position is displayed.

65 Soft Effects Attachment

The 65 Soft Effects is designed for the S4/i 65mm and 75mm lenses (via the Cooke 75mm adapter ring). The design of this attachment 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 stunning glow on highlights -- subtle, but more pronounced at full aperture at T2, becoming less pronounced as you stop 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 Engineering Award for optical and mechanical design
2000 Primetime Emmy Award for Outstanding Achievement in Engineering Development
2001 Two Queen's Awards for Enterprise - International Trade and Innovation, England
2001 Winner, Exporter of the Year, International Business Awards 2001, Export Times and Trade Partners UK
2001 Winner, Product Innovation, International Business Awards 2001, 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 marked 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 stops marked.

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

- Internal front filter mount -- 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 contacts in the PL mount that synchronise with /i compatible cameras.

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

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

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

Focus Movement -- Our Academy Award®-winning cam focus system, combined with the additional advantage of a large lens barrel diameter, has increased the number of focus marks, particularly for close focusing. Spherical aberration has been controlled throughout the focal range to eliminate compensation for back focus changes with aperture. A four-point contact bearing ensures positive, smooth movement without play.

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

Focus Calibration -- Large, clear numbers on both sides of the focus barrel assist the camera assistant when shooting in difficult lighting conditions. In addition, the entrance pupil position is engraved on the lens.

Compatibility -- All Cooke S4/i prime lenses have a common fixed front diameter of 110mm (except for 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, hardwearing surface to meet the most demanding environmental conditions.

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

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

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