ZEISS CONTAX B SPEED EF : 18-25-35-50-85-135mm

EF MOUNT ZEISS CONTAX HIGHSPEED CINEMODED lenses set:
18mm T4 / 25mmT2.8 / 35mmT1.4 / 50mmT1.4 / 85mmT1.4 / 135mmT2.8
Declicked, EF mount, 80mm O.D. front, Focus Ring, Custom Cap
Free Custom Laser Engraved Flight Case

The ZEISS CONTAX B SPEED EF is a high-quality series of prime lenses designed for professional photography, primarily associated with the Contax brand and often used in both film and digital formats.

General Features:

• Mount: Contax/Yashica (C/Y) mount (The lenses are designed to fit the Contax film cameras but can be adapted to various digital cameras using lens adapters).
• Lens Type: Prime lenses (Fixed focal lengths).
• Autofocus: Manual focus only.
• Design: Designed to offer high optical performance with minimal distortion, chromatic aberration, and excellent image sharpness.

Technical Specifications by Focal Length:

1. ZEISS Contax B Speed EF 18mm f/2.8

   • Focal Length: 18mm
   • Maximum Aperture: f/2.8
   • Minimum Aperture: f/22
   • Lens Construction: Typically 9-11 elements in 7-9 groups (varies slightly by design)
   • Angle of View: Approximately 99° (on 35mm film)
   • Minimum Focus Distance: Around 0.25 meters (25cm)
   • Filter Size: 77mm

2. ZEISS Contax B Speed EF 25mm f/2.8

   • Focal Length: 25mm
   • Maximum Aperture: f/2.8
   • Minimum Aperture: f/22
   • Lens Construction: Around 8-10 elements in 7 groups
   • Angle of View: Approximately 84° (on 35mm film)
   • Minimum Focus Distance: Around 0.25 meters (25cm)
   • Filter Size: 58mm

3. ZEISS Contax B Speed EF 35mm f/2.8

   • Focal Length: 35mm
   • Maximum Aperture: f/2.8
   • Minimum Aperture: f/22
   • Lens Construction: Typically 8 elements in 6 groups
   • Angle of View: Approximately 63° (on 35mm film)
   • Minimum Focus Distance: 0.3 meters (30cm)
   • Filter Size: 52mm

4. ZEISS Contax B Speed EF 50mm f/1.4

   • Focal Length: 50mm
   • Maximum Aperture: f/1.4
   • Minimum Aperture: f/16
   • Lens Construction: 6 elements in 5 groups
   • Angle of View: Approximately 47° (on 35mm film)
   • Minimum Focus Distance: 0.45 meters (45cm)
   • Filter Size: 52mm

5. ZEISS Contax B Speed EF 85mm f/1.4

   • Focal Length: 85mm
   • Maximum Aperture: f/1.4
   • Minimum Aperture: f/16
   • Lens Construction: 7 elements in 6 groups
   • Angle of View: Approximately 28° (on 35mm film)
   • Minimum Focus Distance: 0.95 meters (95cm)
   • Filter Size: 72mm

6. ZEISS Contax B Speed EF 135mm f/2.8

   • Focal Length: 135mm
   • Maximum Aperture: f/2.8
   • Minimum Aperture: f/22
   • Lens Construction: Typically 6 elements in 4-5 groups
   • Angle of View: Approximately 18° (on 35mm film)
   • Minimum Focus Distance: 1.5 meters (150cm)
   • Filter Size: 72mm

Other Common Features:

• Coating: Zeiss T* (T-star) multi-coating, which helps reduce flare and ghosting while enhancing contrast and color saturation.
• Manual Focus: These lenses generally feature smooth manual focus with precise control, making them excellent for both professional photography and videography.
• Build Quality: Zeiss lenses are known for their exceptional build quality, often featuring metal housings and durable components that provide a robust feel.

Optical Performance:

• Zeiss lenses are renowned for their sharpness, contrast, and color rendition.
• Wide apertures (like f/1.4 on the 50mm and f/2.8 on others) enable excellent background blur (bokeh) and allow for shooting in lower light conditions.
• High optical quality with low distortion, making them ideal for various genres, including portrait, landscape, and studio photography.

Compatibility:

• These lenses were designed for Contax cameras but can be adapted to other systems using the appropriate adapters, including those for mirrorless and DSLR cameras.