Compare lenses

Canon RF-S 18-45mm f/4.5-6.3 IS STM vs Sigma 16-300mm f/3.5-6.7 DC OS Contemporary

The Canon RF-S 18-45mm f/4.5-6.3 IS STM and the Sigma 16-300mm f/3.5-6.7 DC OS Contemporary side by side, computed from this guide's catalogue.

Which to pick

Pick the Canon RF-S 18-45mm f/4.5-6.3 IS STM if you want a lighter lens (130 g against 615 g). Pick the Sigma 16-300mm f/3.5-6.7 DC OS Contemporary if you want a brighter f/3.5 (0.7 stops more light), for dim light and softer backgrounds; more reach (to 450mm equivalent); a wider view (from 24mm equivalent); and a fit on more cameras (131 against 18 in this guide).

Still torn? Ask the guide about the Canon RF-S 18-45mm f/4.5-6.3 IS STM and the Sigma 16-300mm f/3.5-6.7 DC OS Contemporary

Specs side by side

Rows that differ are in full colour; the better value is marked where one is better by any measure.
Spec	Canon RF-S 18-45mm f/4.5-6.3 IS STM	Sigma 16-300mm f/3.5-6.7 DC OS Contemporary
Maker	Canon	Sigma
Focal length	18-45mm (zoom)	16-300mm (zoom)
Full-frame equivalent	27-68mm on APS-C	24-450mm on APS-C
Maximum aperture	f/4.5-6.3	f/3.5-6.7brighter
Made for	APS-C	APS-C
Mounts	Canon RF	Sony E, Fujifilm X, L-Mount, Canon RF, Nikon Z
Stabilised	yes	yes
Autofocus	yes	yes
Zoom range	2.5×	18.8×more range
Weight	130 glighter	615 g
Cameras it fits	18 in this guide	131 in this guidefits more cameras

Focal range, in full-frame terms

Canon RF-S 18-45mm f/4.5-6.3 IS STM: 18-45mm on APS-C, like 27-68mm.

Sigma 16-300mm f/3.5-6.7 DC OS Contemporary: 16-300mm on APS-C, like 24-450mm.

Aperture

Canon RF-S 18-45mm f/4.5-6.3 IS STM: f/4.5 wide open.

Sigma 16-300mm f/3.5-6.7 DC OS Contemporary: f/3.5 wide open.

Each opening drawn to scale against f/1.4: a smaller f-number lets in more light and blurs the background more.

Field of view

How wide each sees, at each end, on the sensor it was made for.

Cameras they fit

18 cameras in this guide take both, so either works on the same body. In all, the Canon RF-S 18-45mm f/4.5-6.3 IS STM fits 18 and the Sigma 16-300mm f/3.5-6.7 DC OS Contemporary 131.