Canon RF-S 10-18mm F4.5-6.3 IS STM vs Sigma 16-300mm f/3.5-6.7 DC OS Contemporary
Both are Canon RF lenses for APS-C. Here is what actually differs.
Pick the Canon RF-S 10-18mm F4.5-6.3 IS STM if
- You want the lighter lens to carry: 475 g lighter (150 g vs 625 g)
- You want a wider view: 10mm vs 16mm at the wide end
- You want a compact lens: 44.9 mm vs 121.4 mm long
- Our notes say it suits: Landscapes, interiors, vlogging
Pick the Sigma 16-300mm f/3.5-6.7 DC OS Contemporary if
- You need ⅔ stop more light for low light or background blur (f/3.5 vs f/4.5)
- You need more reach: 300mm vs 18mm at the long end
- You care about the shape of out-of-focus highlights: 9 aperture blades vs 7
- You prefer a newer design: released 2025 vs 2023
Spec differences
14 differences| Canon RF-S 10-18mm F4.5-6.3 IS STM | Sigma 16-300mm f/3.5-6.7 DC OS Contemporary | |
|---|---|---|
| Brand |
Canon
|
Sigma
|
| Type |
Wide Zoom
|
Superzoom
|
| Focal length |
10-18mm
|
16-300mm
|
| Max aperture |
f/4.5
|
f/3.5
⅔ stop faster
|
| Weight |
150 g
lighter
|
625 g
|
| Length |
44.9 mm
shorter
|
121.4 mm
|
| Diameter |
69 mm
slimmer
|
73.8 mm
|
| Filter thread |
49 mm
|
67 mm
|
| Max magnification |
not listed
|
0.5×
|
| Aperture blades |
7
|
9
more blades
|
| Optical design |
12 elements / 10 groups
|
20 elements / 14 groups
|
| Autofocus motor |
STM
|
Linear motor
|
| Weather sealing |
not listed
|
Yes
|
| Released |
2023
|
2025
|
3 identical specs hidden: mount, format, image stabilization. Show all
- Mount
- Canon RF both
- Format
- APS-C both
- Image stabilization
- Yes both
Our notes
Canon RF-S 10-18mm F4.5-6.3 IS STM
The RF-S 10-18mm F4.5-6.3 IS STM is a compact ultra-wide zoom for Canon APS-C RF cameras with stabilization, giving about a 16-29mm full-frame equivalent.
Pros
- Very compact (150 g)
- Image stabilization
- Wide-angle view on APS-C
Cons
- Slow variable aperture
- Relies on in-camera distortion correction
Our notes
Sigma 16-300mm f/3.5-6.7 DC OS Contemporary
More comparisons
Canon RF-S 10-18mm F4.5-6.3 IS STM vs Laowa 10-18mm f/4.5-5.6 FE Zoom
Canon RF-S 10-18mm F4.5-6.3 IS STM: landscapes
Canon RF 10-20mm F4 L IS STM vs Sigma 16-300mm f/3.5-6.7 DC OS Contemporary
55 g lighter vs ⅓ stop faster
Canon RF-S 10-18mm F4.5-6.3 IS STM vs Tamron 18-300mm F3.5-6.3 B061 RF
wider (10mm) vs ⅔ stop faster
Canon RF 14-35mm F4 L IS USM vs Sigma 16-300mm f/3.5-6.7 DC OS Contemporary
85 g lighter vs ⅓ stop faster
Canon RF-S 10-18mm F4.5-6.3 IS STM vs Laowa 8-16mm f/3.5-5 Zoom CF
more reach (18mm) vs ⅔ stop faster
Tamron 18-300mm F3.5-6.3 B061 RF vs Sigma 16-300mm f/3.5-6.7 DC OS Contemporary
Sigma 16-300mm f/3.5-6.7 DC OS Contemporary: wider (16mm), more blades