Canon RF10-20mm F4 L IS STMvsCanon RF7-14mm F2.8-3.5 L FISHEYE STM
RF10-20mm F4 L IS STM
10-20mm / F4
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RF7-14mm F2.8-3.5 L FISHEYE STM
7-14mm / F2.8-3.5
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Which to choose
When the RF10-20mm F4 L IS STM suits you better
- StabilizationHas stabilization
When the RF7-14mm F2.8-3.5 L FISHEYE STM suits you better
- Brightness1.0 stops brighter — better in low light and blurs the background more
- Weight94g lighter, so easier to carry
- Close focusFocuses as close as 15cm
These points are derived mechanically from the numbers. How a lens actually renders does not show up in specifications, so look at samples before deciding.
Size compared
- RF10-20mm F4 L IS STM112mm long × 83.7mm diameter
- RF7-14mm F2.8-3.5 L FISHEYE STM109.4mm long × 76.5mm diameter
Specifications compared
| Specification | Canon RF10-20mm F4 L IS STM | Canon RF7-14mm F2.8-3.5 L FISHEYE STM | Difference |
|---|---|---|---|
| Focal length (wide) | 10mm | 7mm | +3mm |
| Focal length (tele) | 20mm | 14mm | +6mm |
| Max aperture (wide) | F4 | F2.8 | 1.0 stops darker |
| Max aperture (tele) | F4 | F3.5 | 0.4 stops darker |
| Min aperture | F22 | F22 | — |
| Min focus distance | 25cm | 15cm | +0.10m |
| Max magnification | 0.12× | 0.35× | −0.23x |
| Aperture blades | 9blades | 9blades | — |
| Weight | 570g | 476g | +94g |
| Length | 112mm | 109.4mm | +2.6mm |
| Diameter | 83.7mm | 76.5mm | +7.2mm |
| Released | 2023 | 2026 | −3year |
| Stabilization | Yes | No | Yes |
| Weather sealing | Yes | Yes | — |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as RF10-20mm F4 L IS STM relative to RF7-14mm F2.8-3.5 L FISHEYE STM.The highlighted cell is the better side for that specification.
Check prices
RF10-20mm F4 L IS STM
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RF7-14mm F2.8-3.5 L FISHEYE STM
ADLinks to Amazon, B&H Photo, Adorama, KEH Camera, MPB, eBay are affiliate links. We may earn a commission if you buy through them, at no extra cost to you.Links marked “Search results” go to that retailer’s search page for this lens name.Check price and availability on the retailer’s own site.
RF10-20mm F4 L IS STM in detailRF7-14mm F2.8-3.5 L FISHEYE STM in detailAll RF mount lenses