Pentax HD Pentax-D FA 15-30mm f/2.8 ED SDM WR Specs & DoF

15–30 mm

Focal length

f/2.8

Maximum aperture

111°–72°

Diagonal angle of view (Full frame)

Full frame

Designed for

2.0×

Zoom ratio

Specifications#

Brand: Pentax
Model: HD Pentax-D FA 15-30mm f/2.8 ED SDM WR
Lens type: Wide-angle zoom
Focal length: 15–30 mm
Maximum aperture: f/2.8
Image circle: Full frame (36×24 mm)
Mount(s): Pentax K
Projection: Rectilinear
Lensfun correction profile: Yes — distortion/vignetting/TCA

Equivalent focal length on different cameras#

Field of view and depth-of-field equivalence when this lens is used on bodies with different sensor sizes (natively or via an adapter).

Camera format	At 15 mm	At 21 mm	At 30 mm	Equiv. aperture (DoF)
Full frame	15 mm · 111°	21 mm · 92°	30 mm · 72°	f/2.8
APS-C	22 mm · 86°	32 mm · 68°	45 mm · 50°	f/4.2
APS-C (Canon)	24 mm · 84°	34 mm · 65°	48 mm · 48°	f/4.5
Micro Four Thirds	30 mm · 72°	42 mm · 55°	60 mm · 40°	f/5.6

Depth of field & background blur#

Computed on its native Full frame format (CoC 30 µm). “Blur @2 m” is the size of an out-of-focus point at infinity, as a percentage of frame width, with the subject at 2 m — a simple bokeh index. Full table: 16 mm f/2.8 on full frame.

Focal	Aperture	at 1 m	at 2 m	at 5 m	at 10 m	Hyperfocal	Blur @2 m
15 mm	f/2.8	85.0 cm	6.58 m	∞	∞	2.69 m	0.1%
15 mm	f/4	1.45 m	∞	∞	∞	1.89 m	0.1%
15 mm	f/8	∞	∞	∞	∞	95.2 cm	0.0%
21 mm	f/2.8	38.6 cm	1.76 m	94.3 m	∞	5.27 m	0.2%
21 mm	f/4	57.3 cm	3.03 m	∞	∞	3.70 m	0.2%
21 mm	f/8	1.49 m	∞	∞	∞	1.86 m	0.1%
30 mm	f/2.8	18.3 cm	76.1 cm	5.91 m	139 m	10.7 m	0.5%
30 mm	f/4	26.3 cm	1.13 m	11.8 m	∞	7.53 m	0.3%
30 mm	f/8	55.4 cm	2.90 m	∞	∞	3.78 m	0.2%

Handheld & night-sky limits#

NPF assumes typical 20–24 MP sensors (≈6 µm pixels on full frame, ≈3.9 µm on APS-C, ≈3.3 µm on Micro Four Thirds).

Body	Min. handheld shutter (longest focal)	500 rule at 15 mm	NPF at 15 mm, f/2.8
Full frame	1/30 s	33 s	19 s
APS-C	1/50 s	22 s	14 s
APS-C (Canon)	1/50 s	21 s	14 s
Micro Four Thirds	1/60 s	17 s	13 s

Compatible cameras#

Bodies in our database with a native Pentax K mount.

Adapt it to other systems#

Sony E-mount Canon RF Nikon Z Fujifilm X-mount Micro Four Thirds L-Mount Canon EF-M Fujifilm G-mount Hasselblad XCD Nikon 1 (CX)Pentax Q Samsung NX Canon EF Nikon F

Similar lenses#

Sigma 15-30mm f/3.5-4.5 EX DG Aspherical f/3.5–4.5
Sigma 17-35mm F2.8-4 EX DG Aspherical HSM f/2.8–4
Sigma 17-35mm f/2.8-4 EX DG f/2.8–4
Tamron SP AF 17-35mm f/2.8-4 Di LD Aspherical (IF) f/2.8–4
Pentax smc Pentax-DA 12-24mm f/4 ED AL IF f/4
Sigma 12-24mm F4.5-5.6 II DG HSM f/4.5–5.6
Sigma 12-24mm f/4.5-5.6 EX DG Aspherical HSM f/4.5–5.6
Tamron AF 19-35mm f/3.5-4.5 f/3.5–4.5
Tokina 20-35mm f/3.5-4.5 AF-235 II f/3.5–4.5
Pentax HD Pentax-DA* 11-18mm f/2.8 ED DC AW f/2.8
Tamron SP AF 11-18mm f/4.5-5.6 Di-II LD Aspherical (IF) f/4.5–5.6
Pentax smc Pentax-DA Fish-Eye 10-17mm f/3.5-4.5 ED IF f/3.5–4.5

Frequently asked questions#

Is the Pentax HD Pentax-D FA 15-30mm f/2.8 ED SDM WR full frame?

Yes — it covers the full 36 × 24 mm frame.

What is the Pentax HD Pentax-D FA 15-30mm f/2.8 ED SDM WR equivalent to on APS-C?

On a 1.5× APS-C body it frames like 22–45 mm, and like 24–48 mm on Canon APS-C.

What is the Pentax HD Pentax-D FA 15-30mm f/2.8 ED SDM WR good for?

As a wide-angle zoom it suits landscapes, architecture, interiors and astrophotography.

Sources & licences#

Lensfun lens database — CC BY-SA 3.0