Cooke S4i 12mm T2 M-Scale PL

Cooke S4 optics offer superb optical and mechanical performance, control of flare, distortion, veiling glare and spherical aberrations at full aperture. The cam-type focus mechanism allows for smooth focus adjustments. Modular construction increases ease of maintenance and serviceability.

All of the S4 Prime lenses (and CXX zoom lens) are now supplied equipped with /i Technology, as of February 2005. S4/i lenses are designed for all PL mounted professional motion picture film and electronic cameras. The /i Technology provides cinematographers and camera operators with vital information on lens setting, focusing distance, aperture and depth-of-field, hyperfocal distance, serial number, owner data, lens type and focal length in both metric and footage measurements. For zoom lenses, the zoom position is displayed.

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

Aperture
All S4/i primes have a true T2 aperture and cover Super 35mm format, apart from the 300mm (2.8).

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

Focus Movement
Our Academy Award® winning cam-style focus movement coupled with the added benefit of a large lens barrel diameter, has allowed for an increased number of focus markings, particularly at close focus. Spherical aberration has been controlled throughout the range of focal lengths to eliminate compensation of changes in back focus with aperture. A four-point contact bearing provides a smooth positive backlash-free movement.

Focus Scaling
Large, clear numerals on both sides of the focus barrel benefit the focus puller when shooting under difficult lighting conditions. Plus the the Entrance Pupil position is engraved on the lens.

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

Key Features:

• Provides maximum performance at full aperture
• Scratch resistant PTFE anodised finish
• Large, easy to read Focus scales
• Equipped with Cooke's /i Technology
• Eight-Leaf Linear Module Iris
• Provides comfortable balance ratio
• Super 35mm Coverage

T-Stop Range: T2-T22
Angular Rotation of Iris Scale: 96°
Min. Marked Object Distance: 

• 225 mm
• 9 in

Close Focus from Lens Front: 

• 47 mm
• 2.0 in

Angular Rotation to MOD Endstop: 270°
Max. Diagonal Angle of View for Super 35 Format: 103°
Length from Front of Lens to Lens Mount: 

• 126 mm
• 5.0 in

Max Front Diameter: 156 mm
Total Weight:

• 3kg
• 6.5lbs

Maximum Format Cover: 30mm diameter (Super 35mm format)
Focus Scales: Two opposing focus scales - metric or footage. Scales marked from infinity to MOD.
Focus Drive Gear: 140 teeth 0.8 metric module x 6.0mm wide x 98mm from image plane. 140 teeth 0.8 module x 6.0mm wide x 99mm from image plane (300mm)
Iris Scales: Two opposing linear T-scales - whole and third stops marked.
Iris Drive Gear: 134 teeth 0.8 metric module x 4.0mm wide 79.5mm from image plane.
Internal Front Fitting Filter: Internal thread for filter adapter M105 x 0.75 pitch (12mm and 14mm not applicable). M120 x 1.0 pitch (150mm). M131 x 1.0 pitch (180mm, 300mm)