Canon RF 24-105mm f/4 L IS USM

The Canon RF 24-105mm f/4 L IS USM is a full-frame standard zoom for Canon RF cameras, covering 24–105mm at a constant f/4 aperture, with 5-stop image stabilization, weather sealing, USM autofocus, 14 elements in 18 groups, and a 77mm filter thread — all in a 700g, 107mm package.

Key Specifications

• Focal length: 24–105mm (full-frame coverage)
• Maximum aperture: Constant f/4 across the entire zoom range
• Minimum aperture: f/22
• Image stabilization: Yes — 5 stops of compensation
• Lens construction: 14 groups / 18 elements
• Aperture blades: 9 (for rounded bokeh)
• Minimum focus distance: 0.45m | Maximum magnification: 0.24x
• Filter thread: 77mm
• Weight / Length: 700g / 107mm
• Mount: Canon RF | Weather sealed | Lens hood included

What makes the Canon RF 24-105mm f/4 L IS USM special?

The RF 24-105 f/4 L is Canon's flagship allround zoom for the RF system, and it shows in the optical engineering. Where the Canon RF 24-105mm f/4-7.1 IS STM is the budget-friendly option that loses aperture as you zoom in, this L-series version holds a constant f/4 all the way to 105mm — which matters a lot in mixed indoor/outdoor light. The 5-stop image stabilization is one of the strongest you'll find in this class, making handheld shooting at slow shutter speeds genuinely usable.

Compared to the older Canon EF 24-105mm f/4L IS II USM (EF mount), the RF version benefits from the shorter flange distance of the RF system, allowing Canon's optical engineers more freedom — and the results show up in corner sharpness and contrast that reviewers consistently rank higher than its EF predecessor. The 9-blade aperture produces smooth, rounded bokeh for a zoom lens, which is a small but appreciated detail for portrait-style shots at the long end.

Alternatives worth knowing: the Sigma 24-105mm f/4 DG OS HSM Art (EF mount, adaptable) is often cited as optically competitive at a lower price point, but it requires the EF-RF adapter and adds bulk. If you're shooting primarily video and need faster glass, the Canon RF 24-105mm f/2.8 L IS USM Z exists at a significantly higher price — on used, the f/4 L version hits a sweet spot of size, stabilization and optical quality that's hard to beat for travel and everyday shooting.

Build quality is full L-series: fluorine coating on the front element, weather sealing throughout, and the same robust barrel you'd expect from Canon's professional lineup.

Who is the Canon RF 24-105mm f/4 L IS USM for?

If you shoot with an EOS R5, EOS R6, EOS R3, or any other Canon RF camera and want one lens that covers almost everything — this is it. The 24–105mm range handles wide-angle landscapes, standard street shots, and short telephoto portraits without a lens change. That makes it perfect for:

• Travel photographers who don't want to carry two lenses on a flight and need weather sealing for unpredictable conditions.
• Event and documentary shooters who need reliable autofocus (USM is fast and near-silent) and a zoom range that covers group shots and candid moments.
• Hybrid shooters (photo + video) — the 5-stop IS and smooth USM focus make this a solid video lens, especially for run-and-gun work.
• Studio and portrait photographers looking for a versatile zoom to complement a prime — at 105mm f/4 with 0.45m minimum focus distance, it pulls off flattering head-and-shoulders shots.
• Photographers upgrading from a kit lens who want genuine L-series quality in a familiar zoom range.

It's not the right pick if you shoot primarily in very low light and need f/2.8 or faster — for that, look at the Canon RF 50mm f/1.8 STM or the Canon RF 85mm f/2 Macro IS STM as companions. But as a single-lens solution for general shooting, very few zooms in the RF lineup cover more ground this efficiently.

Buying a used Canon RF 24-105mm f/4 L IS USM

Buying this lens second-hand is one of the smarter moves in the RF ecosystem. It's a high-volume lens — sold with a lot of EOS R5 and R6 kits — which means good availability on the used market, often in near-mint condition from photographers who upgraded to a more specialized set of primes.

What to check when inspecting a pre-owned copy:

• Front and rear elements: Look for cleaning marks (fine circular scratches from improper cleaning). Minor marks rarely affect image quality, but heavy cleaning marks on the front element can reduce contrast.
• Zoom and focus rings: Should rotate smoothly with consistent resistance. Grinding or looseness suggests wear or a drop.
• Weather sealing integrity: Check the rubber gasket at the mount end — it should be intact and seated properly.
• IS functionality: Mount it and shoot at 1/15s handheld — you should hear the stabilizer engage and get sharp results consistently.
• Autofocus: USM motors are durable, but test AF in both single and continuous mode to confirm speed and accuracy are normal.
• Internal dust: Some dust inside any used lens is normal and rarely images. A few specks are acceptable; significant clumping near the rear element warrants caution.

Every used Canon RF 24-105mm f/4 L IS USM sold here comes with a minimum 12 months warranty and has been individually photographed so you know exactly what you're getting. The actual warranty period per item is shown on the variant listing.