Canon EF 400mm F2.8L IS III USM is a Fixed aperture Auto Focus (AF)
Super Telephoto Prime lens with Optical Image stabilization and 35mm FF max sensor coverage, and it is designed to be used with
EF Mount cameras.
Canon replaced the older Canon EF 400mm f/2.8L IS II USM with this model. Follow the link to read our detailed comparison of these models:
Compare Canon EF 400mm F2.8L IS III USM vs Canon EF 400mm f/2.8L IS II USM
What type of photography is the Canon EF 400mm F2.8L IS III USM lens good for?
The type of photography that you are planning to use the Canon EF 400mm F2.8L IS III USM is an important decision factor. Here we have evaluated its suitability to various photography scenarios:
Lenses in Canon EF Mount with Same Focal and Aperture Range
Canon EF 400mm F2.8L IS III USM is a member of Canon's EF L series of lenses. Below you can see the latest lenses in this series.
EF L Series Lenses in Canon EF Mount
Reasons to Buy Canon EF 400mm F2.8L IS III USM Lens
Here we've included a summary of the advantages and disadvantages of the Canon EF 400mm F2.8L IS III USM lens in a list form to help you determine whether it offers the features you need.
| Optical Image Stabilization |
| Weather-sealed |
| Autofocus |
| Distance Scale |
| Compatible with Canon Teleconverters |
| Hood supplied |
| Tripod Collar |
| Full-time Manual Focusing |
| Focus Distance Limiter |
| Covers Full-Frame Sensor |
| 9 Diaphragm Blades for Smooth Bokeh |
| 400mm reach great for Wildlife Photography |
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Lens Mount
Canon EF 400mm F2.8L IS III USM is compatible with cameras that have a Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
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Size, Weight and Filter Thread
Size and weight is a very important decision factor when searching for your next lens. Canon EF 400mm F2.8L IS III USM has a maximum diameter of 163mm and total length of 343mm. It weighs 2840g / 100.2 oz.
Canon EF 400mm F2.8L IS III USM has a filter thread of 52mm. Below are links to the filters that we recommend you to consider for your Canon EF 400mm F2.8L IS III USM:
Focal Range
Canon EF 400mm F2.8L IS III USM has a fixed focal length of 400mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 640mm.
Teleconverter Compatibility
Canon EF 400mm F2.8L IS III USM is compatible with the Teleconverters below. With the use of these TC/extenders, you can find how the total focal reach and effective aperture of your Canon EF 400mm F2.8L IS III USM changes below:
Canon EF 400mm F2.8L IS III USM Focal Range and Aperture Change with Teleconverter
Weather Sealings
The Canon EF 400mm F2.8L IS III USM is a weather-sealed lens, which provides extra protection to prevent water and dust get inside the lens and camera body under light rain, snow and wind. In order to have effective protection, you have to pair the Canon EF 400mm F2.8L IS III USM with a weather-sealed camera body such as the Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Optical Image Stabilization
The Canon EF 400mm F2.8L IS III USM features an optical image stabilization system which helps to reduce the blur that occurs due to shaking during hand-held shooting.
Tripod Collar
With a total length of 343mm and a weight of 2840g, the Canon EF 400mm F2.8L IS III USM is a large lens. Fortunately, it comes with a tripod collar which you can use to attach the lens directly to a tripod or monopod instead of attaching the camera. This connection helps to better balance the lens/kit combination.
Maximum Magnification Ratio
Canon EF 400mm F2.8L IS III USM has a Max Magnification Ratio of 0.17x and has a minimum focusing distance of 2.5m. 0.17x means that the max magnification ratio is very low and not suitable even for modest close-up shots.
Aperture
Canon EF 400mm F2.8L IS III USM has a max aperture of F2.8 and a minimum aperture of F32.
Optical Formula
Canon EF 400mm F2.8L IS III USM's optical formula consists of 17 elements in 13 groups . Following special elements are used in this design:
- Super UD
- fluorite elements
- Air Sphere
- Super Spectra
- fluorine coatings
Lens Hood
Canon EF 400mm F2.8L IS III USM comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.
Popular Comparisons of Canon EF 400mm F2.8L IS III USM
Here are the eight most popular comparisons of the Canon EF 400mm F2.8L IS III USM amongst Camera Decision readers.
Top Alternatives of Canon EF 400mm F2.8L IS III USM Lens
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