See in the dark -- with T1.4 speed and a focus ring that illuminates when you need it. External lamps are no longer necessary for the focus puller to see in the dark because this new design incorporates a simple on/off and dimmer to adjust the level of illumination desired on the aperture ring. You now have the visability you need without affecting the light coming into the camera.
Cooke 5/i 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.
Cooke 5/i Prime Lenses were designed and developed in close technical collaboration with industry professionals. They are colour-matched and compatible with Cooke S4/i, miniS4/i, CXX 15-40 mm T2 S4/i Zoom, 18-100mm T3.0 and 25-250mm T3.7 and the SK4 16mm lenses.
All of our 5/i Prime lenses are supplied with /i Technology, and 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.
For companies interested in producing compatible products with /i Technology, the /i protocol is available as a free download in PDF format: /i Technology Reference Manual
Maximum Format Cover
30mm Diameter (Super 35mm Format)
Two opposing focus scales - metric & footage. Scales marked from infinity to MOD.
Focus Drive Gear
140 teeth 0.8 metric module x 5.0mm wide 102.5mm from the image plane. (135mm – 180 teeth 0.8 metric module x 5.0mm wide x 128mm from image plane)
Two opposing linear T scales - whole and third stops marked.
Iris Drive Gear
134 teeth 0.8 metric module x 2.5mm wide x 82mm from image plane.(135mm – 173 teeth 0.8 metric module x 2.5mm wide x 112mm from image plane)
5 Main Features
The optics are designed to give maximum performance at full aperture with superior control of flare, distortion and spherical aberration.
Accessible via cable connector near the lens mount and contacts in mount that sync with /i compatible cameras and accessories.
All Cooke 5/i prime lenses are colour balanced, colour-matched and compatible with Cooke S4/i, miniS4/i and Anamorphic/i.
All Cooke 5/i primes have a true T1.4 aperture and cover Super 35mm format.
Every index mark is labeled. More detailed markings allow for more detailed focus control.
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.
The 5/i's patented*, dimmable, illuminated focus ring has two separately toggled light pipes that allow the camera operator or focus puller to read the focus scale in low lighting conditions. Illumination options are controlled on the lens or via an external controller.
Cooke Hardened PL Mount with /i Technology contact.
Large, clear numerals on both sides of the focus barrel benefit the focus puller when shooting under difficult lighting conditions.
All Cooke 5/i primes have a common fixed front diameter of 110mm, with a focus drive gear of 140T x 0.8 mod and an iris drive gear of 134T x 0.8. (Except the 135mm)
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.
A seven-leaf linear module iris assembly is fitted into the Cooke 5/i primes with an aperture range of T1.4 to T22.
The lenses are designed for all shooting applications, including handheld and Steadicam, providing comfortable balance ratio with the latest compact cameras.
Reliability and Service
Cooke 5/i prime lenses are designed to meet a market requirement for fully reliable performance with a minimum of downtime.