Canon EF 100-400mm f/4.5-5.6L IS II USM Lens - Super-Telephoto

In this review the Canon EF 100-400mm f/4.5-5.6L IS II USM is presented as a compact, high-performance super-telephoto zoom for photographers who need reach without excessive bulk. The bottom line: this lens is best for wildlife and sports shooters who want sharp, high-contrast images and reliable autofocus in a relatively portable package. The combination of fluorite and super UD glass plus Canon's Optical Image Stabilizer delivers consistent image quality across the zoom range, making it a straightforward choice for action and distant-subject work.

Key Features

• Compact L-series design: Delivers super-telephoto reach in a lighter, more portable body that is easier to carry for long field sessions.
• Fluorite and super UD elements: Reduce chromatic aberration and improve resolution and contrast across the entire 100-400mm zoom range.
• Optical Image Stabilizer: Provides up to four shutter speed steps of correction for handheld shooting at long focal lengths.
• Air Sphere Coating and fluorine coatings: Minimize flaring and ghosting while helping resist smears and fingerprints on the front and rear elements.
• 9-blade circular aperture: Produces pleasing out-of-focus areas for subject isolation in wildlife and sports images.

Who It's For

The lens is aimed at enthusiast and pro-level photographers who frequently shoot wildlife, birds, and sports and need long reach with high image quality without carrying a heavier super-telephoto prime. Its fast, reliable autofocus and effective stabilization make it practical for shooting handheld or on monopods in the field.

Photographers who need extreme low-light apertures or the ultimate absolute reach may prefer heavier primes or longer zooms; likewise, studio or product shooters who do not require long focal lengths should look elsewhere for more compact short-telephoto options.

Pros & Cons

Pros

• Excellent image quality with strong resolution and contrast across the zoom range.
• Fast, accurate AF and effective stabilization that help capture action and distant subjects.
• Durable L-series construction with coatings that reduce flare and resist smudges.
• Relatively compact and transportable for a super-telephoto zoom.

Cons

• Some renewed units have been reported with scratches on elements or issues with lens support, so inspect condition carefully when buying used.

Specifications

Focal length	100-400mm
Maximum aperture	f/4.5-5.6
Image stabilization	Optical IS, up to 4 shutter speed steps (CIPA, 400mm)
Optical elements	Includes one fluorite and one super UD element
Aperture blades	9-blade circular aperture
Coatings	Air Sphere Coating (ASC) and fluorine coatings front/rear

Our Verdict

The Canon EF 100-400mm f/4.5-5.6L IS II USM is a strong choice for wildlife and sports photographers who want long reach, superb optical performance, and reliable stabilization in a relatively compact package; renewed units represent good value but require condition checks for scratches or support issues before purchase.

Frequently Asked Questions

Is this lens good for wildlife photography?
Yes. The long zoom range, fast autofocus, and strong image stabilization make it well suited to wildlife and bird shooting.

Does the image stabilizer work well at 400mm?
Yes. Canon's IS provides up to four shutter speed steps of correction at 400mm under CIPA testing, which helps handheld shooting.

Are there common condition issues with renewed units?
Some buyers report scratches on elements and mixed feedback about lens support, so inspect any renewed unit carefully or buy from a seller with a clear return policy.