Canon · RF

RF 800mm F11 IS STM

Released July 2020

A full-frame 800 mm prime for EOS R cameras with a fixed f/11 aperture, diffractive optics, STM autofocus, optical stabilisation and a retracting barrel for storage.

Mount
Canon RF
Focal length
800 mm
Max aperture
f/11
Stabilisation
Yes
Weight
1,260 g

What reviewers say

Both reviews find good sharpness and unusually portable 800mm reach, with effective autofocus in suitable light. The fixed f/11 aperture and narrow view make moving subjects and poor light challenging. Abbott values the reach and praises bird tracking on the R5; Cameralabs prefers the 600mm's handling and records more modest stabilisation gains. Extending the barrel can delay shooting.

From dustinabbott.net and cameralabs.com

Optics

Lens type
Prime
Focal length
800 mm
Maximum aperture
f/11
Minimum aperture
f/11
Optical construction
Eleven elements in eight groups
Special elements
Gapless dual-layer diffractive optical element
Aperture detail
Fixed f/11 aperture; cannot be stopped down
Diaphragm
No aperture blades
Angle of view
2°35′ horizontal, 1°40′ vertical and 3°05′ diagonal on full frame

Mount and compatibility

Mounts
Canon RF
Image circle
Full frame
Compatibility
Canon RF mount for full-frame and APS-C EOS R cameras; EOS R, Ra and RP require compatible firmware
Teleconverter support
RF 1.4× gives 1120 mm at f/16 and 0.19× maximum magnification; RF 2× gives 1600 mm at f/22 and 0.28×. Canon lists autofocus and stabilisation as supported with both; performance depends on camera and light levels

Focus and stabilisation

Autofocus
Yes
Minimum focus distance
6 m
Maximum magnification
0.14×
Optical stabilisation
Yes
Autofocus detail
Lead-screw STM autofocus; Canon states approximately 40% horizontal × 60% vertical AF coverage in its original EOS R compatibility notes
Focus distance detail
Minimum focus 6 m; full-range or 20 m–infinity focus limiter (Cameralabs)
Magnification detail
Maximum 0.14× without an extender
Stabilisation detail
Up to four stops optical stabilisation under CIPA testing with EOS R

Design

Dust and moisture resistant
No
Filter diameter
95 mm
Maximum diameter
101.6 mm
Length
281.8 mm
Weight
1,260 g
Controls
Separate manual focus and customisable control rings; focus limiter, AF/MF and stabiliser switches
Zoom design
Prime lens with a retracting storage barrel; extend and lock the barrel before shooting
Weather resistance
No dust or moisture resistance; no rubber mount seal (Cameralabs)
Dimensions detail
101.6 mm maximum diameter; 281.8 mm retracted length or 351.8 mm when extended for shooting
Weight detail
Approximately 1260 g lens
Tripod mount
Built-in tripod mounting thread; no rotating collar (Cameralabs)
Lens hood
Optional ET-101 hood; not included
In the box
Lens, E-95 cap, RF dust cap and user manual kit
Release detail
July 2020 marketed month in Canon Camera Museum

Pros and cons

Pros

  • 1260 g lens weight
  • Optical stabilisation
  • Retracts to 281.8 mm for storage

Cons

  • Fixed f/11 aperture
  • 6 m minimum focus distance
  • No dust and moisture sealing

Closest rivals

Model
MountFocal lengthMax apertureStabilisationWeightReleased
Canon RF600 mmf/11Yes930 gJul 2020
Canon RF800 mmf/5.6Yes3,140 gMay 2022
Canon RF1,200 mmf/8Yes3,340 gMay 2022

Sources

  1. canon.co.uk/lenses/rf-800mm-f11-is-stm/specifications
  2. usa.canon.com/support/p/rf800mm-f11-is-stm
  3. canon.co.uk/store/canon-rf-800mm-f11-is-stm-lens/3987C005
  4. global.canon/en/c-museum/product/rf493.html
  5. dustinabbott.net/2021/09/canon-rf-800mm-f11-is-stm-review
  6. cameralabs.com/canon-rf-600mm-800mm-f11-review

Photo: Canon Asia Photo Library; official press archive member RF800mm f11 IS STM_Slant.jpg; complete supplied canvas and white background retained.

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