Metabones Contax Yashica CY to X-mount Speed Booster ULTRA 0.71x CINE

by Metabones
Availability: 14-20 days delivery
  • Contax/Yashica-Mount Lens to FUJIFILM X
  • Ultra-High Index Tantalum-Based Glass
  • 1-Stop Increase in Lens Apertures
€640.50 €512.40

Package includes

  • Metabones Speed Booster Ultra 0.71x Cine Adapter for Contax/Yashica-Mount Lens to FUJIFILM X-Mount Camera
  • Rear Cap
  • Front Cap

The Speed Booster Ultra 0.71x Cine Adapter from Metabones allows a Contax/Yashica-mount lens to be used a FUJIFILM X-mount camera. The adapter's optics maximize the connected lens's apparent angle of view by a factor of 0.71x while providing a one-stop increase for the camera over the lens's aperture range. This adapter condenses the light from a lens designed for 35mm film cameras and projects it onto the FUJIFILM X-size sensor. This allows the camera's sensor to utilize more of the light gathered by a connected lens, which effectively reduces the crop factor while making available to the sensor an additional one f/stop of light for each of the lens's f/stop settings.

This adapter is constructed from aluminum for durability while minimizing weight, and its mounting rings are made with brass to further prevent wear and tear. The internal optics feature five lens elements in four groups and are designed to provide optical clarity as well as color fidelity. The detachable tripod foot is Arca-type compatible and features 1/4"-20 threads.

Key Features

  • Allows a full-frame Contax/Yashica-mount lens to be used with a FUJIFILM X-mount camera
  • Maximizes apparent angle of view of combined camera and lens
  • Positive lens locking ring
  • Provides a 1-stop increase for the camera over the lens's aperture range
  • Five lens elements in four groups for optical clarity and color fidelity
  • Detachable Arca-type compatible tripod foot with 1/4"-20 threads
  • Aluminum components for weight reduction
  • Brass mounting rings prevent wear and tear

Metabones MB_SPCY-X-BM3 Specs


Camera Mount


Lens Mount




Optical Design

5 Elements in 4 Groups

Electronic Communication






Aluminum, Brass

Tripod Mounting Thread

1/4"-20 Female