Compare Canon RF 800mm F5.6L vs Canon EF 400mm F2.8 L IS III
Construction
Aperture Blades
9 blades, Rounded blades
9 blades
Form Factor
Super Telephoto Prime Lens
Super Telephoto Prime Lens
Image Size
Full-Frame
Full-Frame
Lens Barrel
Tripod collar
Focus limiter, Tripod collar, Distance scale
Lens Mount
Canon RF-mount
Canon EF-mount
Material
Magnesium alloy
Motor
Ring-type ultrasonic
Ring-type ultrasonic
Optical Formula | Elements
26 elements
17 elements
Optical Formula | Groups
18 groups
13 groups
Optical Formula | Special Glass
2 Fluorite, 1 Super UD, 1 UD (Ultra-low Dispersion). groups
Super UD + fluorite elements + Air Sphere + Super Spectra + fluorine coatings groups
Dimensions
Filter Diameter
52 mm / 2.05 in
52 mm / 2.05 in
Size | Diameter
163 mm / 6.42 in
163 mm / 6.42 in
Size | Length
432 mm / 17.01 in
343 mm / 13.50 in
Weight
3140 g / 110.95 oz
2840 g / 100.35 oz
Function
Angle Of View
3.1° Diagonal | 2.6° Horizontal | 1.7° Vertical
6.2° Diagonal | 5.2° Horizontal | 3.4° Vertical
Aperture
f/5.6 ~ f/64
f/2.8 ~ f/32
Autofocus
Yes
Yes
Focal Length
800 mm
400 mm
Focus Type
Internal
Rear
Image Stabilization
Yes (4 stops)
Yes (5 stops)
Weather Resistance
Yes
Yes
Performance
Max Magnification
0.34x
0.17x
Min Focus Distance
2600 mm / 102.36 in
2500 mm / 98.43 in
Production
Accessory
Lens Hood: ET-155 (supplied), Short lens hood (ET-155B)
Lens hood included
Debut
2022-02-24
2018-09-05
Reviews
Neofiliac score
90%
62%
Pros
- Optically stabilized
- Weather-sealed
- Comes with a tripod collar
- Superb build quality
- Very fast autofocus
- Superb autofocus performance
- Very, very sharp
- Optically stabilized
- Weather-sealed
- Comes with a tripod collar
Cons
- Too expensive
- Very expensive
- Quite heavy
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