Canon RF 100-400mm f5.6-8 IS USM Lens - 1063106
Perfect for wildlife, sports, travel and more, the RF100-400mm F5.6-8 IS USM is a compact, lightweight telephoto lens for EOS R Series cameras, offering a versatile zoom range that brings subjects closer with ease. The RF100-400mm F5.6-8 IS USM is similar in size to the EF 70-300mm F4.5-5.6 IS II USM lens, and not only reaches to 400mm, but also has fast Nano USM focusing and up to 6 stops of Coordinated IS when used in combination with an EOS R series camera featuring In-body Image Stabilization, like the EOS R5 and EOS R6, or 5.5 stops with an EOS R/RP camera. Using a single Ultra Low Dispersion lens element towards the front of the lens group corrects chromatic aberration throughout the entire zoom range, making your images look crisp and colorful with minimal color blur. The RF100-400mm F5.6-8 IS USM lens can also accept both the RF1.4x and RF2x tele extenders giving you the effective maximum focal length of 560mm and 800mm respectively. With a control ring that allows for quick setting changes, including shutter speed and aperture, the RF100-400mm F5.6-8 IS USM lens puts quality, convenience and control in your hands.
What our Experts Think
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Lightweight, travel-friendly telephoto zoom
The Canon RF 100-400mm f/5.6-8 IS USM offers versatile reach from 100–400 mm in a compact, lightweight package that’s easy to carry on hikes, trips, and long shoots.
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Strong stabilization for handheld use
Built-in Image Stabilization (up to ~5.5 – 6 stops) helps counteract shake, especially when paired with a body that has IBIS, making handheld telephoto shooting more reliable.
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Smooth, quiet Nano USM autofocus
The Nano USM system delivers fast and quiet focusing suitable for both stills and video, with responsive performance across the zoom range.
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Good image quality for the class
Independent reviews and community feedback describe very good optics for its price and weight, though some note corner softness at extreme focal lengths—often not noticeable in real-world use.
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Affordable reach with extender support
Compatible with RF 1.4x and 2x extenders, it can extend reach to 560 mm or 800 mm equivalent, adding flexibility for wildlife and distant subjects.
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Community perspective
Users appreciate its light weight, sharpness, and value, especially for outdoor and casual wildlife shooting, while noting that the slower maximum aperture can require stopping down or higher ISO in low light.
Q&A
Q: What is the Canon RF 100-400mm f/5.6-8 IS USM?
A: A compact, lightweight telephoto zoom lens for Canon EOS R-mount mirrorless cameras, offering a versatile 100–400 mm reach with image stabilization and fast Nano USM autofocus.
Q: What makes this lens versatile?
A: Its 100–400 mm zoom range covers wildlife, sports, travel, and distant subjects while staying relatively light and easy to carry.
Q: How good is the image stabilization?
A: It features Optical Image Stabilization with up to ~5.5 stops of shake correction on its own, and up to ~6 stops when paired with a camera body that has in-body IS (like EOS R5/R6).
Q: What about autofocus performance?
A: Nano USM delivers smooth, quiet, and responsive autofocus for both stills and video.
Q: How is image quality?
A: Reviews and user experiences report very good optics for the price and weight, though some note slight corner softness at long focal lengths and at wide apertures.
Q: Does it have a nice background blur?
A: The 9-blade circular aperture helps produce pleasing bokeh, especially at longer focal lengths.
Q: What are the handling benefits?
A: Its compact size and light weight make it easy to shoot handheld on hikes or travel compared with larger telephoto zooms.
Q: Can I use teleconverters with it?
A: Yes—compatible with Canon RF Extender 1.4x and 2x to extend reach up to 560 mm or 800 mm equivalent.
Q: Is it worth buying?
A: Yes—if you want a lightweight, affordable telephoto zoom for wildlife, sports, and travel; note that sharper pro-grade 100-400mm lenses exist but at higher cost and weight.
Maintenance Tips
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Front Element Care: Use a blower first, then a microfiber cloth; avoid dry wiping dust.
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Always Use Lens Hood: Protects against flare, impact, and dust while shooting outdoors.
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Zoom Barrel Care: Extend/retract smoothly; avoid forcing, especially in sandy or dusty environments.
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IS System Care: Turn off Image Stabilization when mounted on a tripod to reduce internal wear.
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Moisture Protection: Store in a dry bag or cabinet with silica gel to prevent fungus and haze.
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Clean Contacts: Gently wipe RF mount contacts for stable autofocus and communication.
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Field Use Care: Avoid exposing lens while zooming in windy or dusty conditions.
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Filter Protection: Use a quality UV/protective filter to safeguard the front element.
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Proper Storage: Keep capped, upright, and in a padded case away from heat and humidity.
