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Canon

Canon RF 100-400mm f/5.6-8 IS USM

Canon's budget route to 400mm reach — reviewers call it '"buy four of these for the price of one RF 100-500mm."' A popular choice for casual wildlife and bird photographers and travellers who want reach without the weight or cost of L-series glass, though sharpness softens past around 350mm and it isn't certified for Canon's RF extenders.

Starting from
£719 new
Used from £539 (Wex Photo Video)
Available at 3 retailers
Check price at Clifton Cameras
✓ Available at 3 retailers 🔒 No signup needed 📦 UK stock only
RetailerPrice
Clifton Cameras
Clifton Cameras
£719
Check on Clifton Cameras →
Wex Photo Video
Wex Photo Video used
£539
Check on Wex Photo Video →
Amazon
Amazon
—
Check on Amazon →
Prices are synced live from UK retailers. Not every product will be stocked by every retailer; older models may only be available second hand.
Core
Released
2021
Lens Type
Zoom
Focal Length
100–400mm
Aperture
f/5.6-8
Compatible Mount
Canon RF
Filter Size
67mm
Dimensions
79.5mm x 164.7mm
Weight
635g
Weather Sealed
No
Optics & Focus
AF Motor
Nano USM
Optical IS
5.5-stop IS
Aperture Blades
9
Magnification
0.41x
Min. Focus Distance
0.88m

Select up to 2 cameras to compare against the RF 100-400mm f/5.6-8 IS USM. It's always pinned as the baseline.

Select 1–3 cameras to compare

4 cameras compatible with the Canon RF mount.

EOS R6
Canon
EOS R6
£1299
EOS R6 Mark III
Canon
EOS R6 Mark III
£2799
EOS R5 Mark II
Canon
EOS R5 Mark II
£4299
EOS R3
Canon
EOS R3
£5999
GearScore™ — Suitability by Genre

Base score — computed from verified specs for an enthusiast shooting photo and video. Camera Match adjusts it for your skill level and priorities.

Portrait
5.5
Street
4.2
Travel
5.1
Wedding & Events
5.6
Filmmaking
4.3
Documentary
4.9
Sports & Action
6.6
Landscape
4.6
Wildlife
6.7
Casual
5.8
Food
5.6
Macro
5.8
Architecture
4.7
Underwater
4.6
✅ Great For
🦅
Wildlife 6.7 Strong on focal length, autofocus and optical stabilisation. Affordable 400mm reach for casual wildlife and bird photography.
⚠️ Not Ideal For
🌆
Street 4.2 Held back by focal length and maximum aperture.
🎬
Filmmaking 4.3 Held back by video handling and maximum aperture.
🌄
Landscape 4.6 Held back by focal length and weather sealing.
📝 How suitability scores are calculated GearScore™ genre scores are calculated from this camera's verified specifications — autofocus, sensor, weight, weather sealing and more — weighted by what matters for each type of photography. Where a spec sheet misses something (e.g. a manual-focus rangefinder for street), we apply a documented editorial adjustment. Scores are not based on customer reviews. See our full methodology →
Price History — RF 100-400mm f/5.6-8 IS USM