Metabones Contarex to Emount Speed Booster 0.71x (Black Matt)

The Metabones Contarex to Sony E-Mount Speed Booster 0.71x (Black Matt) lets you mount Contarex lenses on Sony E-Mount cameras while widening the field of view by 0.71×, increasing maximum aperture by 1 stop, and enhancing resolution for professional-quality imaging.

The Metabones Contarex to E-Mount Speed Booster 0.71x (Black Matt) is designed for photographers seeking to use classic Contarex lenses on modern Sony E-mount cameras. The adapter’s advanced optics, designed by Caldwell Photographic in the USA (patent granted), optimize lens performance by reducing the effective crop factor, widening the lens’s angle of view, and increasing maximum aperture by one stop.

It also improves MTF for sharper images and better contrast. The built-in aperture control ring allows precise manual adjustments, while the detachable Arca-type tripod foot is compatible with Arca Swiss, Markins, and Photo Clam ball heads for stable mounting. The Speed Booster is constructed to provide durability and long-term reliability, and its satin black finish gives a professional appearance.

This adapter is fully mechanical and does not support electronic communication, autofocus, or electronic aperture control. Note: Metabones is not licensed, approved, or endorsed by Sony or Contarex.

Key Features:

• Adapts Contarex lenses to Sony E-Mount cameras
• 0.71× magnification widens lens field of view
• Increases maximum aperture by 1 stop for brighter images
• Optimizes MTF for improved resolution and contrast
• Built-in manual aperture control ring
• Detachable Arca-type tripod foot compatible with Arca Swiss, Markins, and Photo Clam heads
• High-quality optics designed by Caldwell Photographic, USA (patent granted)
• Satin black finish for professional appearance
• Fully mechanical; no electronic communication or autofocus