Extender RF 1.4x

Extends a super telephoto lens’ focal length by 1.4x, so that an 800mm focal length, for example, becomes 1120mm. The extra reach makes it possible to get larger close-ups with the original camera resolution.

  • Dust and drip resistance design with white heat-shield coating
  • Supports High-precision and Fast AF
  • Excellent Flare and Ghosting Reduction

High Image Quality

A large aperture lens placed near the image sensor, the use of high-refractive, low-dispersion glass, and three cemented lenses that minimise air contact surface suppress field curvature, lens aberration and flare and ghosting, hence optimising corner-to-corner image quality.

Reach For the Moon!

Strength & Reliability

The lens features a vibration- and impact-resistant structure with a dust- and drip-resistant design, ready to withstand nature, motorsports, and other harsh professional and advanced shooting scenes.

Supporting heavy lenses is all in a day’s work for its robust, durable body.

AF Support

Shooting at super-long focal lengths means a shallower depth-of-field, which can make focusing tricky. On the Extender RF 1.4x, built-in microprocessors communicate with the lens, achieving high-precision AF over an area as large as up to 100% x 100% (horizontal x vertical) of the focal plane* helping you to lock focus on your subjects more easily. 

*Actual AF area depends on the lens, extender, and camera body.

Lens Compatibility

Lenses Compatible with
Extender RF 1.4x
After attaching Extender RF 1.4x
Focal Length Max Aperture Autofocus Coverage
(Approx. Horizontal × Vertical)
EOS R3/R6 II/R8 EOS R5/R6 EOS R7/R10/R50 EOS R/RP
RF400mm f/2.8L IS USM 560mm f/4 100% x 100%4 100% x 100%4 100% x 100%4 88% x 100%
RF600mm f/4L IS USM 840mm f/5.6 100% x 100%4 100% x 100%4 100% x 100%4 88% x 100%
RF600mm f/11 IS STM 840mm f/16 40% × 60% 40% × 60% 60% × 80% 40% × 60%
RF800mm f/5.6L IS USM 1120mm f/8 100% x 100%4 100% x 100%4 100% x 100%4 88% x 100%
RF800mm f/11 IS STM 1120mm f/16 40% × 60% 40% × 60% 60% × 80% 40% × 60%
RF1200mm f/8L IS USM 1680mm f/11 80% × 80% 80% × 80% 100% x 100%4 80% × 80%
RF100-300mm f/2.8L IS USM 140-420mm f/4 100% x 100%4 100% x 100%4 100% x 100%4 88% x 100%
RF100-400mm f/5.6-8 IS USM 140-560mm f/8-11 80% × 80% 80% × 80% 100% x 100%4 80% × 80%
RF100-500mm f/4.5-7.1L IS USM 420-700mm3 f/8-10 100% x 100%4 80% × 80% 100% x 100%4 80% × 80%
RF200-800mm f/6.3-9 IS USM 280-1120mm f/9-13 100% x 100%4 100% x 100%4 100% x 100%4 40% × 60%

1 The supported autofocus area range will vary depending on the camera and lens combination.
2 Requires EOS R3/R5/R6 II/R6/R8/R7/R bodies and compatible lenses for optimal dustproof and waterproof capability. Use in rain is not recommended.
3 When used with the RF100-500mm f/4.5-7.1L IS USM, the lens zoom operation range is limited to 300-500mm.
4 Applies when subject is detected, approximately 90% (horizontal) x 100% (vertical) otherwise.

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*Source for instruction manuals and software for EOS, EOS accessories, lenses, PowerShot, SELPHY and professional video products in various supported languages.
https://cam.start.canon/