Sirui EF-RF Adapter

The Sirui EF-RF adapter lets you mount Canon EF lenses on Canon RF mount cameras and camcorders. It was designed for SIRUI Jupiter cine lenses and also works with other Canon EF-mount cine lenses. The aluminium alloy body is light and sturdy, and the support foot with a 1/4″-20 thread props up rigs with heavy lenses, matte boxes and other accessories on rails.

Canon EF lenses on Canon RF bodies

This SIRUI Jupiter series adapter converts a Canon EF lens to Canon RF mount without sacrificing much image quality.

Canon EF → Canon RFAluminium alloy1/4″-20 thread170 g

Support for heavy rigs

The adapter’s support foot with a 1/4″-20 thread keeps the rig balanced when a matte box, follow focus or other accessories hang on the lens, and protects both the lens mount and the camera mount.

SIRUI Jupiter series

Jupiter cine lenses come with EF or PL mounts; the adapters convert them to Sony E, Canon RF, Fujifilm GFX or L-Mount.

Aluminium alloy

A light and sturdy body that sits on the lens without play.

Construction

The adapters are made of aluminium alloy and have a 1/4″-20 thread in the support foot for propping up or mounting on rails.

Mounting an EF lens

Align the red dot on the adapter with the dot on the lens mount and twist the lens counterclockwise until it stops. To remove it, press the button and twist the lens clockwise.

In a shooting rig

With the adapter, an EF-mount Jupiter lens can be used on mirrorless cameras, including full rigs with a cage and matte box.