Compare lenses

Pentax HD FA 43mm f/1.9 Limited vs Sigma 30mm f/1.4 DC HSM Art

The Pentax HD FA 43mm f/1.9 Limited and the Sigma 30mm f/1.4 DC HSM Art side by side, computed from this guide's catalogue.

Which to pick

Pick the Pentax HD FA 43mm f/1.9 Limited if you want coverage of full frame, so it suits the larger-sensor bodies too. Pick the Sigma 30mm f/1.4 DC HSM Art if you want a brighter f/1.4 (0.9 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 20 in this guide).

Still torn? Ask the guide about the Pentax HD FA 43mm f/1.9 Limited and the Sigma 30mm f/1.4 DC HSM Art

Specs side by side

Rows that differ are in full colour; the better value is marked where one is better by any measure.
Spec	Pentax HD FA 43mm f/1.9 Limited	Sigma 30mm f/1.4 DC HSM Art
Maker	Pentax	Sigma
Focal length	43mm (prime)	30mm (prime)
Full-frame equivalent	43mm	45mm on APS-C
Maximum aperture	f/1.9	f/1.4brighter
Made for	Full frame	APS-C
Mounts	Pentax K	Canon EF, Nikon F, Pentax K
Stabilised	no	no
Autofocus	yes	yes
Weight	155 g	not listed
Cameras it fits	20 in this guide	51 in this guidefits more cameras

Focal range, in full-frame terms

Pentax HD FA 43mm f/1.9 Limited: 43mm.

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

Aperture

Pentax HD FA 43mm f/1.9 Limited: f/1.9 wide open.

Sigma 30mm f/1.4 DC HSM Art: f/1.4 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

20 cameras in this guide take both, so either works on the same body. In all, the Pentax HD FA 43mm f/1.9 Limited fits 20 and the Sigma 30mm f/1.4 DC HSM Art 51.