The Canon EF 24-70mm f/2.8L USM and the EF 24-105mm f/4L IS USM are two popular standard zooms for EF-mount cameras, and they make opposite trade-offs. The 24-70mm offers a wider maximum aperture, while the 24-105mm offers a longer zoom range and image stabilization. Choose based on whether you need light-gathering power or flexibility.
What Each Lens Is For
The 24-70mm f/2.8L is a professional workhorse zoom. Its constant f/2.8 aperture lets in more light, gives a little more background blur and allows faster shutter speeds in dim venues. It is often used for events, portraits and photojournalism.
The 24-105mm f/4L IS is a general-purpose travel and walk-around zoom. Its extra reach and built-in stabilization make it flexible for landscapes, travel and casual video or photo work.
Note that Canon has made more than one version of the 24-70mm f/2.8L, so check which version a listing refers to.
Key Differences
| Trait | 24-70mm f/2.8L USM | 24-105mm f/4L IS USM |
|---|---|---|
| Maximum aperture | f/2.8 | f/4 |
| Zoom range | Shorter | Longer |
| Image stabilization | Not in the original version | Yes |
| Typical use | Events, portraits, low light | Travel, landscape, all-round |
Size and weight differ as well, so check the maker’s specification page for exact dimensions.
Aperture or Stabilization?
Each feature helps in a different way. A wider aperture lets you use a faster shutter speed, which freezes subject movement. Stabilization helps with camera shake on still subjects, but it cannot freeze a moving person.
- Shooting people in dim rooms: the f/2.8 lens has an advantage.
- Shooting landscapes and cityscapes handheld: stabilization and range help.
- Shooting video handheld: stabilization is useful.
- Wanting stronger background blur: f/2.8 gives more.
Range in Real Use
The extra 35mm at the long end of the 24-105mm may sound small, but it changes how you shoot. It lets you frame head-and-shoulders portraits, isolate details in a landscape and crop less afterward. With the 24-70mm you will sometimes walk closer or accept a tighter crop, which is an easy habit for event shooters and a nuisance for travelers.
How to Choose
- List the situations where you shoot most often.
- If you often miss shots because of low light, lean toward f/2.8.
- If you often wish you had more reach, lean toward 24-105mm.
- Consider whether you need one lens for everything or can add a second lens later.
- Check the condition of any used copy, including zoom smoothness and focus.
FAQ
Which lens is sharper?
Sharpness varies by version, copy and aperture. Look at independent lens charts and sample images for the exact version you plan to buy.
Will these fit mirrorless Canon cameras?
They are EF lenses, so they fit EOS R bodies with Canon’s mount adapter. Confirm compatibility on the maker’s page.
The Short Version
Choose the 24-70mm f/2.8L if you shoot people or events in low light and want a wider aperture. Choose the 24-105mm f/4L IS if you want more reach, stabilization and an easy all-round zoom for travel and landscapes.
