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RF800mm F5.6 L IS USM Lens

Super Telephoto

Item Code: 5055C002AA


Outstanding Image Quality, 800mm Super-telephoto Fixed Focal Length Lens Expands the EOS R System


Optimized magnification optics increase the focal length while retaining the lightness and high levels of image quality achieved in the EF400mm f/2.8L IS III USM and EF600mm f/4L IS III USM lenses. A combination of two large-diameter Fluorite elements, one Super UD (Ultra-low Dispersion) and one UD-glass element provides outstanding sharpness and contrast, center to corner, even at maximum aperture. A UD lens element positioned in the rear section of the lens provides excellent correction of the increased chromatic aberration generated by the magnification optics. This results in tack-sharp images with minimal color fringing in any shooting condition.

Photo by Charles Glatzer, Canon Explorer of Light, using the Canon EOS R3 and RF800mm F5.6 L IS USM lens.

Impressively Light at 6.9 lbs., While Retaining High Levels of Image Quality

The RF800mm F5.6 L IS USM distinguishes itself by maintaining incredibly high image quality expected from a Canon L-series lens with a supremely light weight build for its focal length. This allows for subjects and situations where telephoto power and portability are vital. Since it uses the same optical design in its front section as the EF400mm f/2.8L IS version III lens, similar superb image quality can be expected, delivering visual impact with its amazing telephoto power.

Minimum Focusing Distance of Approx. 8.53 ft. / 2.6 m.


With a minimum focusing distance of approx. 8.53 ft./2.6m, the RF800mm F5.6 L IS USM lens helps you get close to your subjects. At its closest focus distance, users can fill the frame with a subject roughly the size of a sparrow. Maximum close-up magnification is 0.34x - more than 1/3 life-size - which is outstanding for a super-tele lens of this type.

Photo by Charles Glatzer, Canon Explorer of Light, using the Canon EOS R3 and RF800mm F5.6 L IS USM lens.

Optical Image Stabilization with up to 4.5 Stops* of Shake Correction

The RF800mm F5.6 L IS USM features an Optical Image Stabilizer system that provides up to 4.5 stops* of shake correction, delivering consistent and sharp results. Whether hand-held or mounted on a monopod (or other devices allowing mobile positioning), the lens's Image Stabilization can deliver clear image detail in low-light situations or at lower ISOs. This applies when capturing both stills and video, for stable shooting, and sharp final imagery.

Three IS Operation Modes

Three image stabilization modes provide shake-correction for outstanding results in a wide range of shooting situations. These include traditional stabilization, with the correction visible any time IS is active in the camera's viewfinder (IS Mode 1); helping to correct camera shake when intentionally panning horizontally (or vertically), providing shake-correction perpendicular to the photographer's panning movement (IS Mode 2); and stabilization that instantly goes into effect only when the shutter is released - no correction visible between shots, in the camera's viewfinder (IS Mode 3).

Super Spectra Coating (SSC) and Air Sphere Coating (ASC) Helps Minimize Ghosting and Flare


The RF800mm F5.6 L IS USM lens features Canon's Super Spectra Coating (SSC) that helps maintain overall image quality and color fidelity, as well as Air Sphere Coating (ASC), which significantly helps to reduce the occurrence of lens flare and ghosting. The RF800mm F5.6 L IS USM continues to deliver outstanding images and video, even at maximum aperture, in harsh back-lighting conditions.

Compatible with Canon RF1.4x and 2x Extenders

To help get you even closer to distant subjects, attach the compatible Extender RF1.4x or Extender RF2x to the RF800mm F5.6 L IS USM. Expand effective telephoto power to 1120mm at f/8 with the Extender RF1.4x, or to an effective 1600mm at f/11 using the Extender RF2x. The extenders allow even more telephoto reach when it’s needed yet allow the user to convert back to an f/5.6 lens for low-light situations by simply removing the extender.

Customizable Electronic Focus Ring, with Manual Focus Capability during SERVO AF

The lens's large manual focus ring is located directly on the lens barrel and allows you to select from three different manual focus speed levels, to adjust the focus ring rotation to your desired preference. The “1” position on the M.Focus Speed switch provides the fastest sensitivity (a small amount of focus ring rotation provides significant focus change in the lens); settings 2 and 3 reduce this sensitivity, allowing for finer manual focus adjustments. This can help whether you need a slow speed to switch between someone's eyes in a distant profile, or a fast speed to dial in on different birds in a large, swiftly moving flock. Additionally, depending on camera settings, manual focus is still possible while AF is engaged, letting you fine tune focus adjustments to suit your shooting preferences.

Two Focus Presets Available - Instantly Return to One or Two Memorized Focus Distances

Memorize one - or two - different focus distances, and immediately return to either one with a slight turn of the RF800mm F5.6 L IS USM lens’s playback ring, on the lens barrel. A wildlife photographer, for example, can pre-focus on two different spots where he or she expects wildlife to appear, and immediately jump to either memorized position via the playback ring. Full AF or manual focus operation remains available, as well.

Photo by Charles Glatzer, Canon Explorer of Light, using the Canon EOS R5 and RF800mm F5.6 L IS USM lens.

9-blade Circular Aperture for Beautiful, Soft Backgrounds

Thanks to its 9-blade, circular aperture, the RF800mm F5.6 L IS USM is capable of gorgeous bokeh, achieving evocative out-of-focus areas and soft backgrounds. With rounded rendering of background blur, the 9-blade circular aperture helps create intimacy and intensity in both photos and videos for impactful results.

Photo by Charles Glatzer, Canon Explorer of Light, using the Canon EOS R3 and RF800mm F5.6 L IS USM lens.

Durable L-series Construction with Dust- and Water-resistant Design, Fluorine Coating on Front Element for Easy Cleaning

Built to L series lens specifications, the RF800mm F5.6 L IS USM features a highly durable design for excellent performance even in inclement weather conditions. It delivers a dust- and water-resistant construction with seals around the mount, switches, rings and more. To help maintain a clean lens, even after multiple lens changes in sub-optimal conditions, the RF800mm F5.6 L IS USM has a specially designed fluorine coating on its front and rear surfaces. The coating helps to prevent water, oil, and other surface residue like fingerprints from sticking to the lens, which facilitates quick and easy wiping, without the use of solvents.


Focal Length


Maximum and Minimum Aperture

f/5.6 - f/64

Lens Mount Type

RF Mount, metal

Compatible Cameras

Canon EOS R-series

Minimum Focusing Distance

2.6 m / 8.53 ft.

Maximum Magnification


Field of View, at Minimum Focus Distance

Approx. 206 mm x 138 mm / 8.1 x 5.4 in.

Angle of View (Diagonal)

03° 05'

Canon RF Extender 1.4x/2x


Equivalent Focal Length / Maximum Aperture

RF1.4x - 1120mm f/8
RF2x - 1600mm f/11

Maximum close-focusing magnification

RF1.4x - 0.49x RF2x - 0.71x

Autofocus with EOS R-series cameras* * (as of 2/2022)

Possible with either extender

Image Stabilizer with EOS R-series cameras* * (as of 2/2022)

Possible with either extender

Lens Construction

26 elements in 18 groups

Special Elements

(2) Fluorite, (1) Super UD Lenses, (1) UD (Ultra-low Dispersion)

Lens Coating

Super Spectra Coating, Fluorine Coating, ASC

Filter Size Diameter

ο52 mm

Aperture Blades

9, circular shape

Image Stabilization

4 stops correction with In-lens Optical Image Stabilization

Focusing Drive System

Canon USM low-speed drive (Ring USM)

Full-time Manual Focusing

(Supports both ONE SHOT AF and SERVO AF with compatible EOS R-series cameras)

Manual Focus Speed Selection

Yes (1, 2, and 3 settings, via switch on lens)
• 1= fastest MF; 3= slowest MF rotation

Focus Distance Range Selection

Yes (3 positions, via switch on lens)
• FULL - 2.6m/8.5 feet - infinity
• 2.6m/8.5 feet - 20m/65.6 feet
• 20m/65.6 feet - infinity

Dual Pixel CMOS AF Coverage (Horizontal x Vertical)

EOS R5/R6 - approx. 100% x 100%
EOS R - approx. 88% x 100%

With Extender RF1.4x

EOS R5/R6 - approx. 100% x 100%
EOS R - approx. 88% x 100%

With Extender RF2x

EOS R5/R6 - approx. 80% x 80%
EOS R - approx. 80% x 80%

Power Focus

Yes, via rotation of Playback Ring
• Lens Focus Preset switch set to OFF; Focus Mode switch set to PF
• Two focus speeds, based on ring rotation angle

IS On-Off

Image Stabilizer switch, on lens barrel

Optical Image Stabilization

• 4 stops correction (CIPA standard) with both EOS R and R5

IS Mode Selection

IS Modes 1, 2 and 3 (via switch on lens barrel)
• Mode 1 - general shake correction
• Mode 2 - correction during panning
• Mode 3 - correction only during exposure

Panning Mode Support (SCN Mode)


Control Ring

Dual-function Manual focus ring / Control Ring (selected using camera menu)

Manual Focus Ring

Electronic ring system
• Full-time Manual focus possible
• No physical limit to ring rotational angle

AF/MF Switch

YES - AF/PF/MF Switch

MF/Control Ring Switch

None - must be selected in camera menu

Distance Scale

• Distance scale available in EVF or Live View LCD screen of compatible EOS R-series cameras

Distance Limiter Switch

FULL (2.6 m to infinity) / 2.6 m to 20 m / 20 m to infinity

Focus Pre-set Function

Yes, via Playback Ring on lens barrel
• Off - On - On with beep tone, via lens switch
• Distance memorized via Focus Preset button
• Two distances can be memorized; immediate return to either via direction of Playback Ring

Lens Function Buttons (AF-Stop Buttons)

Yes; four positioned on lens barrel

Dust / Weather Resistant Construction

Yes - rubber ring on lens mount

Maximum Outer Diameter x Length

Approx. ο6.4 in. x 17.0 in. (ο163.0mm x 432mm)


Approx. 110.8 oz. / 6.9 lb. / 3140g

Lens Hood

Canon Lens Hood (long) ET-155 (Bundled)
Canon Lens Hood (short) ET-155B (Sold Separately)

Lens Cap

Canon E-180E (Bundled)

Dust Cap

Canon Lens Dust Cap RF (Bundled)

Lens Case

Canon Lens Soft Case LS600 (Bundled)

Extension Tubes

None (No Canon RF mount extension tubes)

Close-up Lenses 250D / 500D

Not compatible

Drop-in Filters

Compatible - 52mm Drop-in Filter Holder 52 (WIII) Included
• Accepts 52mm screw-in filters
• Canon 52mm clear Protect Filter included

RF800mm F5.6 L IS USM

RF800mm F5.6 L IS USM
  • RF800mm F5.6 L IS USM
  • Lens Cap E-180E
  • Lens Dust Cap RF
  • Drop-in Screw Filter Holder 52(WIII) with 52mm Protect Filter
  • Lens Hood ET-155(WIII)
  • Lens Soft Case LS600
  • Lens Wide Strap B

Compatible Supplies & Accessories

Canon offers a wide range of compatible supplies and accessories that can enhance your user experience with you RF800mm F5.6 L IS USM Lens that you can purchase direct. Scroll down to easily select items to add to your shopping cart for a faster, easier checkout. Visit the Canon Online Store



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*ISO speed is based on recommended exposure index.

This is to make Misc appear on the page when needed.



Introduction to the Canon RF800mm F5.6 L IS USM Lens


Watch along as Canon Expert Rudy Winston takes you on a tour of the features and performance of the RF800mm F5.6 L IS USM Lens.


Introducing the Canon RF800mm F5.6 L IS USM with Explorer of Light Charles Glatzer


Join Canon Explorer of Light Charles Glatzer as he takes the RF800mm F5.6 L IS USM lens on a birding and wildlife photo shoot. With an 800mm focal length, optical image stabilization, and minimum focusing distance of about 8.53 ft., all at an impressively light 6.9 lbs, this lens is versatile and lightweight making it easy to bring the action clear and up close.

This is to make Misc appear on the page when needed.

MTF Charts

A Modulation Transfer Function (MTF) chart measures a lens’ expected optical performance at the center of the picture area and measures repeatedly along the diagonal line, further and further toward the corners of the image. The higher a curve is shown on the chart, the better the lens is performing in the area the chart is measuring. As a curve moves from left to right, it displays the lens' results from center towards the corners.

For more information on understanding how to read Canon Lens MTF charts, please click here.

This is to make Misc appear on the page when needed.


*Based on CIPA (Camera & Imaging Products Association) standards. Testing performed using the EOS R, R5, and R3 cameras.

† Prices and specifications subject to change without notice. Actual prices are determined by individual dealers and may vary.

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