Feature
●Converts light transmission from full-frame Canon EF lens to the Super 35mm image format. It extends the angle of view and optical sensitivity, which effectively reduces the crop factor.
●Increases Maximum Aperture by 1 Stop, make more flexible to use in low light environment.
●If a compatible lens includes autofocus, as well as camera-controlled aperture functions, this adapter is intended to allow those features to be used. Also, if an attached lens is capable of generating Exif metadata, this adapter is designed to allow that information to be saved .
●4 elements in 4 groups that are designed to provide optical clarity as well as color fidelity.
●The underside of its detachable tripod foot is tapped with a 1/4"-20 accessory thread, enabling direct attachment to tripods or quick release plates that feature 1/4"-20 mounts.
●For ease of upgrading its firmware, this adapter also includes a micro-USB port.
[EF-EOSR 0.71x speedbooster]
[EF-ROS R0.71x speeddbooster（PRO)]
[EF-EOSR (Lock Switch)]
[EF-EOS R (Customized Control Ring)]
Description
The 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. Electric contacts are also incorporated into the adapters design and maintain full communication between the camera and lens, as well as support metadata transmission and use of Dual Pixel AF with select Canon EF lenses. The adapter directly attaches to RF-mount camera bodies.
Lens Compatibility
This adapter physically supports working with any Canon EF-mount lens; however, select lenses can maintain full Dual Pixel autofocus support and metadata transmission between the lens and camera