Note: This extender is only compatible with the following lenses.
- RF 100-400mm F5.6-8 IS USM
- RF 100-300mm F2.8L IS USM
- RF 100-500mm F4.5-7.1L IS USM (can only be used within 300-500mm range)
- RF 400mm F2.8L IS USM
- RF 600mm F11 IS STM
- RF 800mm F11 IS STM
- RF 600mm F4L IS USM

Extend the reach of select Canon RF-mount lenses with the Extender RF 1.4x. This teleconverter magnifies the image by 1.4x and retains full communication between the lens and camera body, enabling metering, autofocus, and image stabilization as well as the transmission of Exif data. Additionally, the Extender RF is dust and water resistant and has a heat shield exterior to ensure optimal performance in a range of conditions.