• Official Name: Canon RF 800mm F11 IS STM
• ​Lens Mount: Canon RF

• ​Focal Length: 800mm (fixed prime lens)

• ​Maximum Aperture: f/11 (fixed)

• ​Image Stabilization: Yes, with up to 4 stops of shake correction.

• ​Autofocus Motor: Stepping Motor (STM), which is known for quiet and smooth focusing, making it suitable for video.

• ​Diffractive Optics: Utilizes gapless dual-layer Diffractive Optics (DO) to make the lens far more compact and lightweight than traditional super-telephoto lenses.

• ​Retractable Design: The lens has a retractable barrel with a locking switch, allowing it to be more compact for storage and transport.

• ​Filter Size: 95mm (front)

• ​Lens Control Ring: A customizable ring for adjusting settings like aperture, ISO, or exposure compensation.

​Physical Specifications:

• ​Dimensions (Diameter x Length):
  • ​Retracted (stowed): 101.6 x 281.8 mm (4.0 x 11.1 inches)
  • ​Extended (in-use): 101.6 x 352 mm (4.0 x 13.9 inches)

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  • ​Weight: Approximately 1260g (2.77 lbs)

  ​Additional Information:

  • ​This lens is designed for use with Canon's full-frame mirrorless RF-mount cameras.
  • ​It is compatible with Canon's RF extenders (1.4x and 2x), which will increase the effective focal length and reduce the maximum aperture. For example, using the 1.4x extender will make it a 1120mm f/16 lens.