Cooke S4/i : 18-25-32-40-50-75-100-135mm T2.0 Metric

PL mount prime lenses in metric scale : 18-25-32-40-50-75-100-135mm T2.0

The Cooke S4/i lenses are a set of high-performance cinema lenses known for their exceptional optical quality and are designed for professional filmmakers. Below are the technical details for the Cooke S4/i lenses in the focal lengths you requested: 18mm, 25mm, 32mm, 40mm, 50mm, 75mm, 100mm, and 135mm, all with a T2.0 aperture and in the Metric version.

Cooke S4/i Lens Key Features:

1. Aperture:

   • T-Stop: All S4/i lenses feature a T2.0 aperture.
   • The aperture is designed for high performance in low-light situations while maintaining excellent sharpness and depth of field control.

2. Focal Lengths:

   • Available in 18mm, 25mm, 32mm, 40mm, 50mm, 75mm, 100mm, and 135mm focal lengths.

3. Optical Construction:

   • Type: Prime lenses.
   • Elements: Each lens has a complex optical construction with advanced lens coatings for accurate color rendition, minimal chromatic aberrations, and superior sharpness across the frame.
   • Lens Design: Typically, a combination of glass and aspherical elements to ensure minimized distortion and a natural-looking image.

4. Mounts:

   • Standard PL mount, with interchangeable mounts available for other systems (e.g., LPL, EF).

5. Lens Characteristics:

   • Color Matching: The S4/i lenses are matched for color, ensuring consistency across all focal lengths.
   • Bokeh: Known for its pleasing, smooth bokeh due to the 9-blade aperture design.
   • Focus/Zoom: The focus ring offers precise, smooth adjustments with a long focus throw for accurate focusing control.

6. Size and Weight:

   • Weight: Approximately 1.7 kg (3.7 lbs) per lens, depending on the specific focal length.
   • Length: Varies slightly depending on the focal length (for example, the 18mm is shorter than the 135mm lens).

   Here are the approximate lengths for each focal length:

   • 18mm: 105 mm (4.13 inches)
   • 25mm: 110 mm (4.33 inches)
   • 32mm: 115 mm (4.53 inches)
   • 40mm: 120 mm (4.72 inches)
   • 50mm: 120 mm (4.72 inches)
   • 75mm: 125 mm (4.92 inches)
   • 100mm: 130 mm (5.12 inches)
   • 135mm: 135 mm (5.31 inches)

7. Front Diameter:

   • 114mm for all lenses, which makes them compatible with standard matte boxes.

8. Focus System:

   • Focus Ring Rotation: Approximately 300° for precise focus control.
   • Dual Focus Scales: Both imperial and metric focus scales are available for ease of use.

9. Mounting Compatibility:

   • These lenses are compatible with a wide range of camera systems, including ARRI, RED, and other digital cinema cameras.

10. Technology (i/Technology):

• The i/Technology is integrated into the lens, which enables the transmission of lens data to the camera. This includes information like focus distance, T-stop, and zoom position (if applicable), which can be used for metadata recording and in post-production for visual effects and digital workflows.

Detailed Focal Length Specifications:

18mm T2.0:

• Angle of View (on Super 35mm sensor): 94.2°
• Close Focus: 0.30 m (1’0″)
• Image Circle: 22.0 mm

25mm T2.0:

• Angle of View (on Super 35mm sensor): 76.0°
• Close Focus: 0.30 m (1’0″)
• Image Circle: 22.0 mm

32mm T2.0:

• Angle of View (on Super 35mm sensor): 63.2°
• Close Focus: 0.30 m (1’0″)
• Image Circle: 22.0 mm

40mm T2.0:

• Angle of View (on Super 35mm sensor): 53.6°
• Close Focus: 0.40 m (1’4″)
• Image Circle: 22.0 mm

50mm T2.0:

• Angle of View (on Super 35mm sensor): 43.2°
• Close Focus: 0.50 m (1’8″)
• Image Circle: 22.0 mm

75mm T2.0:

• Angle of View (on Super 35mm sensor): 32.4°
• Close Focus: 0.70 m (2’4″)
• Image Circle: 22.0 mm

100mm T2.0:

• Angle of View (on Super 35mm sensor): 24.6°
• Close Focus: 1.00 m (3’4″)
• Image Circle: 22.0 mm

135mm T2.0:

• Angle of View (on Super 35mm sensor): 18.6°
• Close Focus: 1.50 m (4’10”)
• Image Circle: 22.0 mm

Summary:

The Cooke S4/i lenses provide excellent color rendition, sharpness, and minimal optical distortion. Their T2.0 aperture allows for a shallow depth of field and good low-light performance. The integration of i/Technology allows for precise data capture, making them highly versatile in professional cinematography and post-production workflows. These lenses are widely respected for their classic “Cooke Look”—warmth, subtle contrast, and smooth bokeh.