Compare lenses

Sigma 30mm f/1.4 DC HSM Art vs Tamron SP 45mm f/1.8 Di VC USD

The Sigma 30mm f/1.4 DC HSM Art and the Tamron SP 45mm f/1.8 Di VC USD side by side, computed from this guide's catalogue.

Which to pick

Pick the Sigma 30mm f/1.4 DC HSM Art if you want a brighter f/1.4 (0.7 stops more light), for dim light and softer backgrounds; a design for APS-C, which usually means smaller and lighter; and a fit on more cameras (51 against 39 in this guide). Pick the Tamron SP 45mm f/1.8 Di VC USD if you want optical stabilisation, which helps most on bodies without it and coverage of full frame, so it suits the larger-sensor bodies too.

Still torn? Ask the guide about the Sigma 30mm f/1.4 DC HSM Art and the Tamron SP 45mm f/1.8 Di VC USD

Specs side by side

Rows that differ are in full colour; the better value is marked where one is better by any measure.
Spec	Sigma 30mm f/1.4 DC HSM Art	Tamron SP 45mm f/1.8 Di VC USD
Maker	Sigma	Tamron
Focal length	30mm (prime)	45mm (prime)
Full-frame equivalent	45mm on APS-C	45mm
Maximum aperture	f/1.4brighter	f/1.8
Made for	APS-C	Full frame
Mounts	Canon EF, Nikon F, Pentax K	Canon EF, Nikon F
Stabilised	no	yesstabilised
Autofocus	yes	yes
Cameras it fits	51 in this guidefits more cameras	39 in this guide

Focal range, in full-frame terms

Sigma 30mm f/1.4 DC HSM Art: 30mm on APS-C, like 45mm.

Tamron SP 45mm f/1.8 Di VC USD: 45mm.

Aperture

Sigma 30mm f/1.4 DC HSM Art: f/1.4 wide open.

Tamron SP 45mm f/1.8 Di VC USD: f/1.8 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

31 cameras in this guide take both, so either works on the same body. In all, the Sigma 30mm f/1.4 DC HSM Art fits 51 and the Tamron SP 45mm f/1.8 Di VC USD 39.