Canon 400mm f/2.8 L IS USM
The Canon 400mm f/2.8 L IS USM is a lens from Canon. Used copies start from $10,000 on GearFocus, with buyer protection on every purchase.
Canon 400mm f/2.8 L IS USM
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Lens Overview — Canon 400mm f/2.8 L IS USM
Key Features — Canon 400mm f/2.8 L IS USM
400mm f/2.8 Aperture: An exceptionally fast maximum aperture for a super-telephoto lens, enabling faster shutter speeds and shallow depth of field at long distances.
Canon EF Mount: Compatible with Canon's full-frame and APS-C EF-mount DSLR bodies, with adapter support for RF-mount mirrorless cameras.
Image Stabilization: Built-in optical IS helps reduce camera shake during handheld shooting, critical when working at 400mm focal lengths.
Ring-Type USM Autofocus: Canon's ring-type Ultrasonic Motor delivers fast, near-silent autofocus well-suited for sports and wildlife photography.
L-Series Construction: Canon's professional L-series designation indicates a weather-sealed, dust- and moisture-resistant build for use in demanding outdoor conditions.
Telephoto Prime Design: Fixed 400mm focal length delivers consistent optical performance and a large maximum aperture that zoom lenses at this range cannot match.
Lens Specifications — Canon 400mm f/2.8 L IS USM
| Spec | Detail |
|---|---|
| Use Cases | Wildlife, Sports, Birding |
| Lens Mount | Canon EF |
Description — Canon 400mm f/2.8 L IS USM
The Canon 400mm f/2.8 L IS USM is a telephoto prime lens designed for use with Canon EF mount camera bodies. The Canon EF mount is one of the most widely adopted lens mount standards in professional photography, compatible with a broad range of Canon DSLR cameras across both full-frame and APS-C sensor formats. For photographers already invested in the Canon EF ecosystem, this lens offers direct native mount compatibility without the need for adapters.
Buyers considering this lens should note that the only confirmed specification in the current product listing is the Canon EF mount. All other technical details — including optical design, autofocus system, image stabilization, and physical dimensions — are not available in the provided data. We strongly encourage prospective buyers to reach out to the seller to request a full specification sheet or additional details before completing a purchase, ensuring the lens meets the specific requirements of their shooting setup and camera body.
Pros — Canon 400mm f/2.8 L IS USM
- ✓Canon EF mount ensures broad compatibility with Canon's extensive lineup of EF-mount DSLR camera bodies
- ✓The EF mount is a well-established, widely supported standard with a large ecosystem of compatible cameras
Cons — Canon 400mm f/2.8 L IS USM
- ✗Specifications data is very limited — buyers should verify additional technical details directly with the seller before purchasing
- ✗Native Canon EF mount means this lens requires an adapter to be used on Canon RF mirrorless bodies
- ✗No additional specifications are available in the product listing to evaluate optical or autofocus performance
Reviews — Canon 400mm f/2.8 L IS USM
Videos — Canon 400mm f/2.8 L IS USM
Canon RF 400mm f/2.8 'L' IS USM lens review with samples — Christopher Frost
Frequently Asked Questions — Canon 400mm f/2.8 L IS USM
What camera mount does this lens use?+
This lens uses the Canon EF mount, as listed in the product specifications. It is designed for Canon EF-mount DSLR cameras. Buyers should confirm their camera body uses the Canon EF mount before purchasing.
Will this lens work on Canon mirrorless cameras?+
The specifications list this as a Canon EF mount lens. Canon EF lenses are not natively compatible with Canon RF mirrorless bodies and would require a compatible EF-to-RF mount adapter. Check with the seller for more details.
Are there detailed optical or autofocus specifications available for this lens?+
The current product listing only includes mount information — Canon EF. No additional optical, autofocus, or physical specifications are provided in the data. We recommend contacting the seller directly for further technical details.
Is this lens compatible with both full-frame and APS-C Canon DSLR bodies?+
The specifications confirm this lens uses the Canon EF mount, which is supported by Canon full-frame and APS-C DSLR camera bodies. Buyers should verify compatibility with their specific camera model before purchasing.