The Canon RF 10-20mm f/4 L IS STM is a full-frame ultra-wide-angle zoom lens covering 10–20mm with a constant f/4 aperture, built-in image stabilisation, and L-series weather sealing — making it one of the widest rectilinear RF lenses available for Canon mirrorless cameras.
Key Specifications
- Focal length: 10–20mm (ultra-wide-angle zoom)
- Aperture: f/4 constant (maximum), f/22 (minimum), 9-blade diaphragm
- Image stabilisation: Yes (IS)
- Autofocus: STM (Stepping Motor) — smooth, near-silent AF
- Minimum focus distance: 0.25m with 0.06x maximum magnification
- Build: Weather-sealed, L-series construction
- Dimensions: 84mm diameter × 112mm length, 570g
- Mount: Canon RF — full-frame compatible
Who is the Canon RF 10-20mm f/4 L IS STM for?
If you're into landscape photography, this lens gives you sky-to-foreground drama that simply isn't possible at 16mm or 24mm. At 10mm on a full-frame body like the Canon EOS R5 Mark II or Canon EOS R6 Mark II, you get extreme depth in a single frame — sweeping coastlines, mountain ranges, or tight interior architecture all work beautifully. Astrophotographers will appreciate the ultra-wide field of view for capturing wide Milky Way arcs or sprawling star fields, and the built-in IS helps during tracking shots or video pans. The STM motor makes focus transitions whisper-quiet, so videographers shooting events, documentary work, or real-estate walkthroughs get clean audio tracks too. The 0.25m minimum focus distance is a genuine plus — you can get surprisingly close to foreground subjects and let the background go vast. If you're comparing it to the Canon RF 14-35mm f/4 L IS USM, the 10-20mm goes noticeably wider and weighs slightly less, though it gives up 4mm at the long end. For anyone whose shooting style demands those extra wide millimetres — think environmental portraits, sports action from a fixed remote position, or travel storytelling — the 10-20mm is the more specialised and more compelling choice.
Buying a used Canon RF 10-20mm f/4 L IS STM
Picking up a second-hand Canon RF 10-20mm f/4 L IS STM makes a lot of sense given this is an L-series lens — Canon's L glass is built to last, and used copies in excellent condition are common. Every pre-owned lens at Camera-tweedehands.nl is individually photographed and professionally inspected before listing, so you can see the actual copy you're buying. All used lenses come with a minimum 12 months warranty, and you have 14 days to return if it's not right for you. The weather-sealed barrel means well-kept used copies tend to show minimal wear even after years of field use.
