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.
TechnologyAll 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.
Focus Illumination
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 visibility you need without affecting the light coming into the camera.
T-Stop Range
Angular Rotation of Iris Scale
Min. Marked Object Distance
Close Focus from Lens Front
Angular Rotation to MOD Endstop
Max. Diagonal Angle of View for Super 35 Format
Length from Front of Lens to Lens Mount
Max Front Diameter
Total Weight
18mm
25mm
32mm
40mm
50mm
65mm
75mm
100mm
135mm
T1.4-T22
T1.4-T22
T1.4-T22
T1.4-T22
T1.4-T22
T1.4-T22
T1.4-T22
T1.4-T22
T1.4-T22
90°
90°
90°
90°
90°
90°
90°
90°
90°
350 mm
14 in
14 in
350 mm
14 in
14 in
350 mm
14 in
14 in
400 mm
16 in
16 in
500 mm
20 in
20 in
600 mm
24 in
24 in
650 mm
27 in
27 in
750 mm
30 in
30 in
800 mm
31 in
31 in
127 mm
5 in
5 in
120 mm
5 in
5 in
120 mm
5 in
5 in
171 mm
7 in
7 in
270 mm
11 in
11 in
370 mm
15 in
15 in
420 mm
17 in
17 in
520 mm
21 in
21 in
531 mm
21 in
21 in
270°
270°
270°
270°
270°
270°
270°
270°
340°
79.3°
61.9°
50.5°
41.0°
33.7°
26.1°
22.6°
17.1°
12.68°
171 mm
6.73 in
6.73 in
177 mm
6.97 in
6.97 in
177 mm
6.97 in
6.97 in
177 mm
6.97 in
6.97 in
177 mm
6.97 in
6.97 in
177 mm
6.97 in
6.97 in
177 mm
6.97 in
6.97 in
177 mm
6.97 in
6.97 in
219 mm
8.6 in
8.6 in
110 mm
4.33 in
4.33 in
110 mm
4.33 in
4.33 in
110 mm
4.33 in
4.33 in
110 mm
4.33 in
4.33 in
110 mm
4.33 in
4.33 in
110 mm
4.33 in
4.33 in
110 mm
4.33 in
4.33 in
110 mm
4.33 in
4.33 in
136 mm
5.35 in
5.35 in
3.03 kg
6.67 lbs
6.67 lbs
2.98 kg
6.56 lbs
6.56 lbs
2.78 kg
6.12 lbs
6.12 lbs
2.76 kg
6.07 lbs
6.07 lbs
3.23 kg
7.11 lbs
7.11 lbs
3.08 kg
6.78 lbs
6.78 lbs
2.99 kg
6.58 lbs
6.58 lbs
2.89 kg
6.36 lbs
6.36 lbs
5.1 kg
11.2 lbs
11.2 lbs
Maximum Format Cover
30mm Diameter (Super 35mm Format)
Focus Scales
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)
Iris Scales
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
Main Features
Optical Design
The optics are designed to give maximum performance at full aperture with superior control of flare, distortion and spherical aberration.
ElectronicsAccessible via cable connector near the lens mount and contacts in mount that sync with /i compatible cameras and accessories.
Colour Balance
All Cooke 5/i prime lenses are colour balanced, colour-matched and compatible with Cooke S4/i, miniS4/i and Anamorphic/i.
T1.4 Aperture
All Cooke 5/i primes have a true T1.4 aperture and cover Super 35mm format.
Index Marks
Every index mark is labeled. More detailed markings allow for more detailed focus control.
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 Illumination
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.
Camera Mounts
Cooke Hardened PL Mount with /i Technology contact.
Focus Scaling
Large, clear numerals on both sides of the focus barrel benefit the focus puller when shooting under difficult lighting conditions.
Compatibility
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)
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.
Iris
A seven-leaf linear module iris assembly is fitted into the Cooke 5/i primes with an aperture range of T1.4 to T22.
Weight/Size Ratio
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.
Cases Available
*U.S. Patent 8079723, 20 December 2011
