Used Viltrox EF-R3 Canon EF Lens to Canon RF Mount Speed Booster 0.71x Adapter

Attaching EF-mount lenses to RF-mount cine and mirrorless cameras. The VILTROX Mount Adapter EF-EOS R3 0.71x permits attaching EF-mount lenses to RF-mount cine and mirrorless cameras. Intended for cameras featuring a Super35 sensor size, this adapter also incorporates an optical system to increase the effective angle of view by 0.71x, reducing the effects of a full-frame to Super35 crop factor and increasing the maximum aperture performance by one stop.

Typically, when VILTROX EF-EOS R lens adapter is used to connect a full-frame EF lens to an EOS C70 Super 35mm sensor, the focal length is increased by about 1.4x, and the viewing Angle is correspondingly narrowed.

With the EF-EOS R3 0.71x lens adapter, the built-in optical system has a 0.71x magnification factor, once mounted, the adapter maintains a similar angle of view of your full frame lenses on the Super 35mm sensor, while boosting the speed of the attached lens.

This adapter also incorporates an optical system to increase the effective angle of view by 0.71x, reducing the effects of a full-frame to Super 35 crop factor , increasing the maximum aperture performance by one stop.