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's, 18-100mm T3.0 and 25-250mm T3.7, 15-40mm, T2.0 CXX zoom lenses and the SK4 16mm lenses.
TechnologyAll of our 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.
For companies interested in producing compatible products with /i Technology, the /i protocol is available as a free download: See "S4/I Communications v2.28 protocols" in PDF format under Technical Resources, Free downloads.
65 Soft Effects Attachment
The 65 Soft Effects is made for the S4/i 65mm and 75mm lenses (via Cooke 75mm adapter ring). The design for the attachment is based on Cooke's PS945 soft focus lens for 4x5 large format photography. See the effect in sample photos taken with the PS945 lens. The effect is high resolution with a stunning glow to the highlights -- subtle, but most pronounced wide open 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.) More details.
Using the S4 Soft Effects Attachment With the Cooke S4/i 65mm and 75mm Prime Cine Lenses
The Cooke S4 Variable Soft Effects Attachment is designed for use on the 65mm and 75mm S4 cine prime lenses. Depending on the aperture used, a variable degree of softness can be applied to the image. The soft effects attachment fits directly on the 65mm S4 lens, and for this reason it is engraved as being for that lens. If you want to use it on the 75mm S4 lens you need to use the Cooke adapter ring which is engraved for use with that lens.
Adjustment of the Soft Focus Effect
The soft effects attachment delivers a range of soft focus effects with the 65mm and 75mm S4 lenses as the aperture is varied. For the 65mm S4 prime lens the soft focus effect is greatest at T2, reducing to no special effect at T5.6. At apertures below that, the lens operates as a normal, sharp lens. The 75mm S4 lens provides the same effects, but when this lens is stopped down to T4 it is already fairly sharp.
In general, if you want a particular degree of softness you may need to use neutral density filters.
Comparison with Soft Focus Filters
The Cooke soft effects attachment works in a completely different way to nets or soft focus filters. Rather than bluntly scattering the light, it uses a higher order aberration effect to reduce sharpness at lower spatial frequencies in the image. It follows that the change in its effect with aperture is much more pronounced than with a soft focus filter or a net. Roughly speaking, a net or a softening filter has the same effect at all apertures; that is not quite the case, but certainly there is much less variation of softness with aperture when using nets and filters than with the Cooke Soft Effects Attachment.
The Origins of the Soft Effects Attachment
The origins of the Cooke Soft Effects Attachment are in Large Format Still Photography, with our Cooke PS945 Lens for large format photography: Cooke Optics Ltd. manufactures a highly acclaimed large-format stills lens for the 4x5" and 7x5" formats using this soft focus technology, which provides the same variable degree of softness.
At the request of the large format photographic community, this lens is based on the revered Pinkham & Smith portrait lenses of the early 20th century. Use of the Cooke PS945 lens by many professional large format photographers has, ironically, now revealed at least as many non-portrait applications for this lens as portrait applications. The ability of the lens to provide what is described as a "unique, and special luminosity" to the image with a range of lighting arrangements is especially valued. Hide details
The Cooke S4 Variable Soft Effects Attachment is designed for use on the 65mm and 75mm S4 cine prime lenses. Depending on the aperture used, a variable degree of softness can be applied to the image. The soft effects attachment fits directly on the 65mm S4 lens, and for this reason it is engraved as being for that lens. If you want to use it on the 75mm S4 lens you need to use the Cooke adapter ring which is engraved for use with that lens.
Adjustment of the Soft Focus Effect
The soft effects attachment delivers a range of soft focus effects with the 65mm and 75mm S4 lenses as the aperture is varied. For the 65mm S4 prime lens the soft focus effect is greatest at T2, reducing to no special effect at T5.6. At apertures below that, the lens operates as a normal, sharp lens. The 75mm S4 lens provides the same effects, but when this lens is stopped down to T4 it is already fairly sharp.
In general, if you want a particular degree of softness you may need to use neutral density filters.
Comparison with Soft Focus Filters
The Cooke soft effects attachment works in a completely different way to nets or soft focus filters. Rather than bluntly scattering the light, it uses a higher order aberration effect to reduce sharpness at lower spatial frequencies in the image. It follows that the change in its effect with aperture is much more pronounced than with a soft focus filter or a net. Roughly speaking, a net or a softening filter has the same effect at all apertures; that is not quite the case, but certainly there is much less variation of softness with aperture when using nets and filters than with the Cooke Soft Effects Attachment.
The Origins of the Soft Effects Attachment
The origins of the Cooke Soft Effects Attachment are in Large Format Still Photography, with our Cooke PS945 Lens for large format photography: Cooke Optics Ltd. manufactures a highly acclaimed large-format stills lens for the 4x5" and 7x5" formats using this soft focus technology, which provides the same variable degree of softness.
At the request of the large format photographic community, this lens is based on the revered Pinkham & Smith portrait lenses of the early 20th century. Use of the Cooke PS945 lens by many professional large format photographers has, ironically, now revealed at least as many non-portrait applications for this lens as portrait applications. The ability of the lens to provide what is described as a "unique, and special luminosity" to the image with a range of lighting arrangements is especially valued. Hide details
Cooke S4 Lens Awards
1998
Cinec Award for Technical Excellence, 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, 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 Premiere Product Award – S4/i System
Primes
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
12mm
14mm
16mm
18mm
21mm
25mm
27mm
32mm
35mm
40mm
50mm
65mm
65SFmm
75mm
100mm
135mm
150mm
180mm
300mm
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2-T22
T2.8-T22
96°
96°
96°
96°
96°
96°
96°
96°
95°
94°
93°
92°
92°
92°
91°
92°
92°
94°
78°
225 mm
9 in
9 in
225 mm
9 in
9 in
225 mm
9 in
9 in
250 mm
9 in
9 in
250 mm
9 in
9 in
250 mm
9 in
9 in
250 mm
10 in
10 in
325 mm
12 in
12 in
350 mm
14 in
14 in
450 mm
16 in
16 in
550 mm
20 in
20 in
700 mm
27 in
27 in
700 mm
27 in
27 in
800 mm
30 in
30 in
950 mm
36 in
36 in
850 mm
33 in
33 in
1050 mm
42 in
42 in
1300 mm
51 in
51 in
2100 mm
84 in
84 in
47 mm
2.0 in
2.0 in
46 mm
2 in
2 in
46 mm
2 in
2 in
60 mm
2.5 in
2.5 in
60 mm
2.5 in
2.5 in
60 mm
2.5 in
2.5 in
85 mm
3.5 in
3.5 in
119 mm
4.9 in
4.9 in
169 mm
6.9 in
6.9 in
207 mm
8.4 in
8.4 in
323 mm
13 in
13 in
509 mm
20 in
20 in
489 mm
19.2 in
19.2 in
573 mm
23 in
23 in
707 mm
28 in
28 in
564 mm
20.7 in
20.7 in
834 mm
32.8 in
32.8 in
1058 mm
41.7 in
41.7 in
1846 mm
74 in
74 in
270°
300°
270°
300°
270°
300°
270°
300°
300°
300°
300°
300°
300°
300°
300°
340°
320°
320°
320°
103°
94°
86°
80°
71°
62°
58°
50°
46°
41°
34°
26°
26°
22°
17°
13°
11.5°
9.5°
5.7°
126 mm
5.0 in
5.0 in
127 mm
5.0 in
5.0 in
127 mm
5 in
5 in
113 mm
4.5 in
4.5 in
113 mm
4.5 in
4.5 in
113 mm
4.5 in
4.5 in
113 mm
4.5 in
4.5 in
129 mm
5 in
5 in
129 mm
5 in
5 in
141 mm
5.5 in
5.5 in
125 mm
4.9 in
4.9 in
125 mm
4.9 in
4.9 in
145 mm
5.7 in
5.7 in
125 mm
4.9 in
4.9 in
141 mm
5.5 in
5.5 in
184 mm
7.3 in
7.3 in
157 mm
6.2 in
6.2 in
185 mm
7.3 in
7.3 in
202 mm
7.9 in
7.9 in
156 mm
110 mm
110 mm
110 mm
110 mm
110 mm
110 mm
110 mm
110 mm
110 mm
110 mm
110 mm
110 mm
110 mm
110 mm
110 mm
125 mm
136 mm
136 mm
3 kg
6.5 lbs
6.5 lbs
2.2 kg
4.8 lbs
4.8 lbs
2.45 kg
5.40 lbs
5.40 lbs
1.75 kg
3.85 lbs
3.85 lbs
2.0 kg
4.4 lbs
4.4 lbs
1.6 kg
3.5 lbs
3.5 lbs
1.60 kg
3.55 lbs
3.55 lbs
1.85 kg
4.0 lbs
4.0 lbs
1.90 kg
4.20 lbs
4.20 lbs
2 kg
4.4 lbs
4.4 lbs
1.5 kg
3.3 lbs
3.3 lbs
1.6 kg
3.55 lbs
3.55 lbs
2.25 kg
4.95 lbs
4.95 lbs
1.75 kg
3.85 lbs
3.85 lbs
2 kg
4.4 lbs
4.4 lbs
2.25 kg
4.95 lbs
4.95 lbs
3.5 kg
7.7 lbs
7.7 lbs
4.3 kg
9.45 lbs
9.45 lbs
4.7 kg
10.35 lbs
10.35 lbs
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)
S4 Prime Main Features
Prime 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 contacts in PL mount that sync with /i compatible cameras.
Colour Balance
All S4/i prime lenses are colour balanced, color-matched and compatible with Cooke 5/i, miniS4/i and Anamorphic/i.
Aperture
All S4/i primes have a true T2 aperture and cover Super 35mm format, apart from the 300mm (2.8).
Index Marks
Every index mark is labelled. 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.
Camera Mounts
Cooke Hardened PL Mount with /i Technology contacts.
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.
Compatibility
All Cooke S4/i Primes have a common fixed front diameter of 110mm,
(except for 12mm, 150mm, 180mm, 300mm) with a focus drive gear of
140T x 0.8 mod and an iris drive gear of 114T x 0.8
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
An eight-leaf linear module iris assembly is fitted into S4/i primes with an aperture range of T2 to T22.(Except 300mm)
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
S4/i prime lenses are designed to meet a market requirement for fully reliable performance with a minimum of downtime.
Cooke 15-40mm T2.0 CXX Zoom Lens
You expect and get superior performance and ease of operation from Cooke lenses. The Cooke S4/i 15-40mm CXX zoom lens offers attributes beyond great optical and mechanical performance for 35mm/Super 35mm formats:
New Variable Vignetting Stop
Cooke's new Variable Vignetting Stop allows the high speed CXX lens to maintain T2.0 and high resolution throughout the zoom range. This innovative mechanism adjusts automatically. The benefit to you: no ramping and no flare.
Light and Bright
T2, of course. Light and comparable in size to a Cooke S4/i prime telephoto lens. And like our S4/i telephoto lenses, the CXX zoom offers an extraordinary close focus: Under 7 inches from the front element. And like the Cooke S4/i Primes - no breathing.
T2-T2.2
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
15-40mm
92°
450 mm
169 mm
290°
300°
229 mm
136 mm
3.6 kg
Maximum Format Covered
30mm Image Circle (for Super 35 format)
Focus Scales
Two Opposing Focus Scales, Metric or Footage Marked from Infinity to MOD
Focus Drive Gear
153 Teeth 0.8 Metric Module x 6.0mm Wide x 223mm from Image Plane
Zoom Scales
Two Opposing Zoom Scales
Zoom Drive Gear
140 Teeth 0.8 Metric Module x 6.0mm Wide x 99mm from Image Plane
Maximum f-stop
f/1.84
Diagonal Angle of View for 30mm
Image Circle
Image Circle
90 - 41 degrees
Overall Length from Front of Lens
to Image Plane
to Image Plane
11.06 inches / 281mm
Lens Mount
PL
Matte Box Size
6.6 x 6.6 inches
Angular Rotation of Zoom Scale
130 degrees
