The Canon Extender RF 2x is an accessory designed for use with Canon's RF-mount lenses. It is used to extend the focal length of compatible lenses by a factor of 2x, effectively doubling their reach.

The Canon Extender RF 2x features a built-in microcomputer that communicates with compatible cameras and lenses to ensure optimal performance and image quality. It also has a weather-resistant design, making it suitable for use in challenging conditions.

One thing to note is that using the extender will decrease the amount of light that reaches the camera's sensor, as the lens aperture will effectively be reduced by two stops. This means that you may need to use a slower shutter speed or higher ISO settings to maintain correct exposure.

Overall, the Canon Extender RF 2x is a useful tool for photographers who need to extend the reach of their lenses without having to carry multiple lenses or heavy telephoto equipment.

Benefits

The Canon teleconverter features high-refraction, low-dispersion glass to control curvature of field and chromatic aberration of magnification for the highest image quality
As well as optimised lens coatings, a 3-layer combined lens helps to reduce ghosting by reducing the surfaces in contact with the air as much as possible
The exterior is coated in the same white heat shield coating as used on the RF 100-500mm F4.5-7.1L IS USM and RF 70-200mm F2.8L IS USM lens to prevent deterioration in performance in high temperatures
Built with a mechanism that prevents the lens elements from hitting those of the Canon 2x extender²
This Canon 2x extender is designed for reliability and durability with vibrational shock resistance, with dust and water resistance for use by professionals and enthusiasts