Sigma DP2 Specs, Sensor Size & Crop Factor

Q: What is the crop factor of the Sigma DP2?

The Sigma DP2 has a crop factor of 1.74× relative to 35 mm full frame (diagonal 24.9 mm vs 43.3 mm).

1.74×

Crop factor

20.7×13.8 mm

Sensor size

286 mm²

Area · 33% of full frame

4.7 MP

Resolution

7.81 µm

Pixel pitch

f/11.6

Diffraction-limited aperture

Specifications#

Brand: Sigma
Model: DP2
Camera type: Compact
Sensor size: 20.7 × 13.8 mm (1.5" sensor)
Crop factor: 1.74×
Resolution: 4.7 MP (2,652 × 1,768 px)
Continuous shooting: 3 fps
Weight: 260 g (9.2 oz)
Sensor: 20.7 mm × 13.8 mm Foveon X3 Sensor CMOS
Storage: SD card
Viewfinder: none
AF points / area: Contrast Detect AF
Metering: TTL Full Aperture Metering
Exposure modes: Program AE [P], Shutter Priority AE [S], Aperture Priority AE [Ae], Manual [M]
Shutter: Electronically controlled lens shutter
Flash: Pop-up (manual) Guide no. 6 (ISO100/m)
Battery: Lithium Ion battery BP-31
Dimensions: 113.3 × 59.5 × 56.1 mm (4.5 × 2.3 × 2.2 inch)
Lens: 24.2 mm (35 mm equivalent 41 mm) f/2.8
Drive: 3 frames/s, limited to 3 successive frames

Specifications merged from Wikipedia, Wikidata, Lensfun and openMVG. Spot an error? Tell us.

Sensor size compared#

The Sigma DP2 sensor (highlighted) drawn to scale against common formats. Its area is 33% of a full-frame sensor, which collects about 1.6 stops less total light at the same exposure.

Focal length equivalents & field of view#

Multiply any focal length by 1.74 to get the full-frame field of view. For fixed-lens cameras use the real focal length printed on the lens (e.g. “6.1–18.3 mm”), not the 35 mm equivalent.

Lens on this camera	Full-frame equivalent	Horizontal	Vertical	Diagonal
8 mm	14 mm	104.6°	81.6°	114.5°
10 mm	17 mm	92.0°	69.2°	102.4°
12 mm	21 mm	81.6°	59.8°	92.1°
14 mm	24 mm	72.9°	52.5°	83.2°
16 mm	28 mm	65.8°	46.7°	75.7°
18 mm	31 mm	59.8°	41.9°	69.3°
20 mm	35 mm	54.7°	38.1°	63.8°
24 mm	42 mm	46.7°	32.1°	54.8°
28 mm	49 mm	40.6°	27.7°	47.9°
35 mm	61 mm	32.9°	22.3°	39.1°
40 mm	70 mm	29.0°	19.6°	34.5°
50 mm	87 mm	23.4°	15.7°	27.9°
56 mm	97 mm	20.9°	14.0°	25.0°
70 mm	122 mm	16.8°	11.3°	20.2°
85 mm	148 mm	13.9°	9.3°	16.7°
100 mm	174 mm	11.8°	7.9°	14.2°
135 mm	235 mm	8.8°	5.9°	10.5°
200 mm	348 mm	5.9°	4.0°	7.1°
300 mm	522 mm	4.0°	2.6°	4.7°
400 mm	696 mm	3.0°	2.0°	3.6°
600 mm	1043 mm	2.0°	1.3°	2.4°

Depth of field table#

Total depth of field at each subject distance, using a circle of confusion of 17.2 µm (the 0.030 mm full-frame standard scaled by the crop factor).

Focal	Aperture	50.0 cm	1.00 m	2.00 m	3.00 m	5.00 m	10.0 m	Hyperfocal
12 mm	f/1.8	10.6 cm	44.6 cm	2.10 m	6.61 m	∞	∞	4.65 m
12 mm	f/2.8	16.8 cm	74.5 cm	4.80 m	∞	∞	∞	2.99 m
12 mm	f/4	24.7 cm	1.22 m	41.2 m	∞	∞	∞	2.10 m
12 mm	f/8	59.9 cm	18.3 m	∞	∞	∞	∞	1.06 m
25 mm	f/1.8	2.4 cm	9.7 cm	39.6 cm	90.7 cm	2.63 m	13.1 m	20.2 m
25 mm	f/2.8	3.7 cm	15.2 cm	62.5 cm	1.46 m	4.51 m	38.0 m	13.0 m
25 mm	f/4	5.3 cm	21.8 cm	91.6 cm	2.21 m	7.86 m	∞	9.08 m
25 mm	f/8	10.6 cm	45.1 cm	2.15 m	6.93 m	∞	∞	4.55 m
42 mm	f/1.8	0.8 cm	3.4 cm	13.8 cm	31.3 cm	87.9 cm	3.62 m	56.9 m
42 mm	f/2.8	1.3 cm	5.2 cm	21.5 cm	48.9 cm	1.38 m	5.89 m	36.6 m
42 mm	f/4	1.8 cm	7.5 cm	30.8 cm	70.4 cm	2.02 m	9.18 m	25.6 m
42 mm	f/8	3.6 cm	15.1 cm	62.7 cm	1.47 m	4.57 m	39.6 m	12.8 m
70 mm	f/1.8	0.3 cm	1.2 cm	4.9 cm	11.1 cm	31.3 cm	1.26 m	158 m
70 mm	f/2.8	0.4 cm	1.8 cm	7.6 cm	17.3 cm	48.7 cm	1.98 m	102 m
70 mm	f/4	0.6 cm	2.6 cm	10.9 cm	24.8 cm	69.8 cm	2.85 m	71.1 m
70 mm	f/8	1.2 cm	5.2 cm	21.8 cm	49.9 cm	1.42 m	6.07 m	35.6 m

Equivalent aperture#

Exposure is identical at the same f-number on any format; equivalence only describes depth of field and total light.

Aperture on this camera	Full-frame equivalent (depth of field)	Hyperfocal at 25 mm
f/1.2	f/2.1	30.2 m
f/1.4	f/2.4	25.9 m
f/1.8	f/3.1	20.2 m
f/2	f/3.5	18.1 m
f/2.8	f/4.9	13.0 m
f/4	f/7.0	9.08 m
f/5.6	f/9.7	6.49 m
f/8	f/13.9	4.55 m

Diffraction & pixel pitch#

With 7.81 µm pixels, diffraction starts to soften pixel-level detail around f/11.6. For maximum sharpness keep landscapes between f/6.4 and f/12; stopping down further trades detail for depth of field.

Aperture	Airy disk diameter	Spread over	At 100% view
f/2.8	3.8 µm	0.5 px	sharp
f/4	5.4 µm	0.7 px	sharp
f/5.6	7.5 µm	1.0 px	sharp
f/8	10.7 µm	1.4 px	sharp
f/11	14.8 µm	1.9 px	sharp
f/16	21.5 µm	2.8 px	slight softening
f/22	29.5 µm	3.8 px	visibly soft

Maximum print sizes#

At 4.7 MP the Sigma DP2 produces 2,652 × 1,768 pixel images. See the 5 megapixel guide or the print size calculator.

Resolution	Typical use	Inches	Centimetres
300 DPI	Photo-lab quality	8.8 × 5.9 in	22 × 15 cm
240 DPI	Fine-art inkjet	11.1 × 7.4 in	28 × 19 cm
200 DPI	Wall print	13.3 × 8.8 in	34 × 22 cm
150 DPI	Poster, viewed from 1 m+	17.7 × 11.8 in	45 × 30 cm

Night-sky exposure limits#

Longest exposure before stars trail. The NPF rule accounts for pixel pitch and is stricter than the classic 500 rule — use it for pin-sharp stars on high-resolution sensors.

Focal length	500 rule	NPF f/1.8	NPF f/2.8	NPF f/4
8 mm (14 mm eq.)	35.9 s	37.1 s	41.5 s	46.8 s
12 mm (21 mm eq.)	24.0 s	24.8 s	27.7 s	31.2 s
14 mm (24 mm eq.)	20.5 s	21.2 s	23.7 s	26.7 s
20 mm (35 mm eq.)	14.4 s	14.9 s	16.6 s	18.7 s
29 mm (50 mm eq.)	9.9 s	10.2 s	11.5 s	12.9 s

Open the NPF / 500 rule calculator →

Handheld shutter speed guide#

The reciprocal rule uses the equivalent focal length. High-resolution sensors may need one stop faster than this for pixel-sharp results.

Focal length	No stabilisation (1/equiv. focal)	With 3-stop IS	With 5-stop IBIS
14 mm	1/25 s	0.3 s	1.3 s
29 mm	1/50 s	1/6 s	0.6 s
58 mm	1/100 s	1/13 s	0.3 s
115 mm	1/200 s	1/25 s	1/6 s

Lens#

The Sigma DP2 has a built-in, non-interchangeable lens. Use the real focal length of that lens with the tables above; its full-frame equivalent is that number × 1.74.

Similar cameras#

Other 1.5" cameras from around the same time.

Frequently asked questions#

What is the crop factor of the Sigma DP2?

The Sigma DP2 has a crop factor of 1.74× relative to 35 mm full frame (diagonal 24.9 mm vs 43.3 mm).

What size is the Sigma DP2 sensor?

20.7 × 13.8 mm (1.5"), an area of 286 mm² — 33% of full frame.

Is the Sigma DP2 full frame?

No — its sensor is 1.5", which is 3.0× smaller in area than full frame.

How many megapixels does the Sigma DP2 have?

4.7 megapixels (2,652 × 1,768 pixels), enough for a 9 × 6 inch print at 300 DPI.

How long can I expose the night sky with the Sigma DP2?

With a 12 mm lens (21 mm equivalent) the 500 rule gives 24 s and the stricter NPF rule at f/2.8 gives 28 s.

Sources & licences#

Last updated October 03, 2026 · How we calculate · Sources