Compare lenses

Pentax HD D FA 21mm f/2.4 ED Limited DC WR vs Pentax smc DA 14mm f/2.8 ED [IF]

The Pentax HD D FA 21mm f/2.4 ED Limited DC WR and the Pentax smc DA 14mm f/2.8 ED [IF] side by side, computed from this guide's catalogue.

Which to pick

Pick the Pentax HD D FA 21mm f/2.4 ED Limited DC WR if you want a brighter f/2.4 (0.4 stops more light), for dim light and softer backgrounds and coverage of full frame, so it suits the larger-sensor bodies too. Pick the Pentax smc DA 14mm f/2.8 ED [IF] if you want a design for APS-C, which usually means smaller and lighter.

Still torn? Ask the guide about the Pentax HD D FA 21mm f/2.4 ED Limited DC WR and the Pentax smc DA 14mm f/2.8 ED [IF]

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 D FA 21mm f/2.4 ED Limited DC WR	Pentax smc DA 14mm f/2.8 ED [IF]
Maker	Pentax	Pentax
Focal length	21mm (prime)	14mm (prime)
Full-frame equivalent	21mm	21mm on APS-C
Maximum aperture	f/2.4brighter	f/2.8
Made for	Full frame	APS-C
Mounts	Pentax K	Pentax K
Stabilised	no	no
Autofocus	yes	yes
Weight	416 g	not listed
Cameras it fits	20 in this guide	20 in this guide

Focal range, in full-frame terms

Pentax HD D FA 21mm f/2.4 ED Limited DC WR: 21mm.

Pentax smc DA 14mm f/2.8 ED [IF]: 14mm on APS-C, like 21mm.

Aperture

Pentax HD D FA 21mm f/2.4 ED Limited DC WR: f/2.4 wide open.

Pentax smc DA 14mm f/2.8 ED [IF]: f/2.8 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

20 cameras in this guide take both, so either works on the same body.