The Canon EF 100-400mm f/4.5-5.6L IS lenses share a focal range and a telephoto zoom purpose, but the second version updated the zoom mechanism, optics and handling. Choose the original if you want a lower-cost used option and like its push-pull zoom, and the Mark II if you want a more modern design. Confirm exact specs on Canon’s page, as this article stays with well-known, stable traits.
What Both Lenses Are For
Both are L-series telephoto zooms for Canon EF-mount SLR cameras. They cover wildlife, birds, sports, air shows and distant landscapes. They are lenses you can carry handheld for a day, rather than the very large supertelephotos.
Key Differences
| Trait | Original 100-400mm | 100-400mm II |
|---|---|---|
| Zoom control | Push-pull slide | Rotating zoom ring |
| Optical design | Earlier design | Redesigned, with newer coatings |
| Stabilization | Earlier system | Updated system |
| Zoom tension | Fixed feel | Adjustable ring tension |
| Position in the market | Older, often found used | Newer, generally the more sought-after one |
Handling in the Field
The push-pull design lets you move quickly between focal lengths with a single sliding motion, which some bird and action photographers like. Others find it awkward, and it can draw dust into the barrel as it extends. The rotating ring on the Mark II feels like most other zooms and tends to be easier to hold steady. Both lenses extend or retract as you zoom, so test the balance on your body.
How to Choose
- Decide how you will use it. For occasional wildlife trips, either version can work. For frequent, demanding use, the newer design may be worth seeking.
- Handle both if you can. The zoom feel is personal.
- Check condition if buying used. Look at the zoom action, image stabilization and any dust in the barrel.
- Look at the accessories you need. Hoods, tripod collars and teleconverter compatibility can vary. Check Canon’s notes for your camera.
- Think about your camera. Both are EF-mount. On mirrorless Canon bodies you will need an adapter.
What They Share
- A 100-400mm range and f/4.5-5.6 maximum aperture
- Ring-type ultrasonic autofocus motors
- L-series build and weather resistance, according to the maker
- Suitability for APS-C and full-frame EF bodies
Used Market Notes
Both lenses turn up second-hand. When comparing listings, ask for photos of the zoom barrel, front element and mount, and ask whether the stabilization has been checked. A seller who can show sample images taken with the lens gives you extra confidence. Buy from a source that offers a return window when possible.
FAQ
Is the Mark II sharper?
Canon redesigned its optics, and many photographers favor the newer version. Differences depend on copy and camera, so look at real sample images from users.
Do both work with teleconverters?
Compatibility depends on the lens, converter and camera. Check Canon’s information before buying.
The Short Version
Choose the original 100-400mm if you like push-pull zooming and want the older, more affordable-to-find design. Choose the Mark II if you prefer a rotating zoom and a more current build. Verify details with Canon.
