Sigma fp Specs, Sensor Size & Crop Factor

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

The Sigma fp has a crop factor of 1.00× relative to 35 mm full frame (diagonal 43.1 mm vs 43.3 mm).

1.00×

Crop factor

35.9×23.9 mm

Sensor size

858 mm²

Area · 99% of full frame

24.6 MP

Resolution

5.98 µm

Pixel pitch

f/8.9

Diffraction-limited aperture

2019

Release year

Specifications#

Brand: Sigma
Model: fp
Camera type: Mirrorless
Released: 2019-10-25
Lens mount: L-Mount
Sensor size: 35.9 × 23.9 mm (Full frame (35 mm))
Crop factor: 1.00×
Resolution: 24.6 MP (6,000 × 4,000 px)
ISO range: 100 – 25,600
Fastest shutter: 1/8,000 s
Continuous shooting: 18 fps
Max video resolution: 4K
Weight: 370 g (13.1 oz)
Sensor type: BSI-CMOS with Bayer filter
Focus: Contrast AF
AF points / area: 49points
Metering: TTL exposure metering
Exposure modes: TTL exposure metering
Shutter: Electronic shutter
Flash: no
Battery: BP-51
Dimensions: 112.6×69.9×45.3mm
Production: 2019–2025
Drive: 18fps
Video: 4K UHD at 24p, Full HD

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

Sensor size compared#

The Sigma fp sensor (highlighted) drawn to scale against common formats. Its area is 99% of a full-frame sensor.

Focal length equivalents & field of view#

Multiply any focal length by 1.00 to get the full-frame field of view. Angles are for a rectilinear lens focused at infinity.

Lens on this camera	Full-frame equivalent	Horizontal	Vertical	Diagonal
10 mm	10 mm	121.8°	100.2°	130.2°
12 mm	12 mm	112.5°	89.8°	121.8°
14 mm	14 mm	104.1°	81.0°	114.0°
16 mm	16 mm	96.6°	73.5°	106.9°
18 mm	18 mm	89.8°	67.2°	100.3°
20 mm	20 mm	83.8°	61.7°	94.3°
24 mm	24 mm	73.6°	52.9°	83.9°
28 mm	28 mm	65.3°	46.2°	75.2°
35 mm	35 mm	54.3°	37.7°	63.3°
40 mm	40 mm	48.3°	33.3°	56.7°
50 mm	50 mm	39.5°	26.9°	46.7°
56 mm	56 mm	35.5°	24.1°	42.1°
70 mm	70 mm	28.8°	19.4°	34.2°
85 mm	85 mm	23.8°	16.0°	28.5°
100 mm	100 mm	20.4°	13.6°	24.3°
135 mm	135 mm	15.1°	10.1°	18.2°
200 mm	201 mm	10.3°	6.8°	12.3°
300 mm	301 mm	6.8°	4.6°	8.2°
400 mm	401 mm	5.1°	3.4°	6.2°
600 mm	602 mm	3.4°	2.3°	4.1°
800 mm	803 mm	2.6°	1.7°	3.1°

Depth of field table#

Total depth of field at each subject distance, using a circle of confusion of 29.9 µm (the 0.030 mm full-frame standard scaled by the crop factor). Detailed tables: 24 mm f/1.8, 24 mm f/2.8, 35 mm f/1.8, 35 mm f/2.8, 50 mm f/1.8, 50 mm f/2.8.

Focal	Aperture	50.0 cm	1.00 m	2.00 m	3.00 m	5.00 m	10.0 m	Hyperfocal
22 mm	f/1.8	5.3 cm	22.0 cm	92.5 cm	2.23 m	7.98 m	∞	9.01 m
22 mm	f/2.8	8.3 cm	34.8 cm	1.55 m	4.21 m	33.3 m	∞	5.80 m
22 mm	f/4	12.0 cm	51.3 cm	2.57 m	9.63 m	∞	∞	4.07 m
22 mm	f/8	25.0 cm	1.26 m	88.6 m	∞	∞	∞	2.05 m
43 mm	f/1.8	1.3 cm	5.6 cm	22.9 cm	52.0 cm	1.47 m	6.33 m	34.4 m
43 mm	f/2.8	2.1 cm	8.7 cm	35.7 cm	81.8 cm	2.36 m	11.3 m	22.1 m
43 mm	f/4	3.0 cm	12.4 cm	51.5 cm	1.19 m	3.57 m	22.0 m	15.5 m
43 mm	f/8	5.9 cm	25.1 cm	1.08 m	2.69 m	10.9 m	∞	7.77 m
73 mm	f/1.8	0.4 cm	1.9 cm	7.8 cm	17.8 cm	49.9 cm	2.03 m	99.1 m
73 mm	f/2.8	0.7 cm	2.9 cm	12.1 cm	27.7 cm	77.9 cm	3.20 m	63.7 m
73 mm	f/4	1.0 cm	4.2 cm	17.3 cm	39.6 cm	1.12 m	4.69 m	44.6 m
73 mm	f/8	1.9 cm	8.3 cm	34.9 cm	80.2 cm	2.33 m	11.1 m	22.3 m
120 mm	f/1.8	0.1 cm	0.7 cm	2.8 cm	6.5 cm	18.2 cm	74.0 cm	268 m
120 mm	f/2.8	0.2 cm	1.0 cm	4.4 cm	10.1 cm	28.4 cm	1.15 m	172 m
120 mm	f/4	0.3 cm	1.5 cm	6.2 cm	14.4 cm	40.6 cm	1.65 m	121 m
120 mm	f/8	0.6 cm	2.9 cm	12.5 cm	28.8 cm	81.6 cm	3.37 m	60.3 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 43 mm
f/1.2	f/1.2	51.6 m
f/1.4	f/1.4	44.2 m
f/1.8	f/1.8	34.4 m
f/2	f/2.0	31.0 m
f/2.8	f/2.8	22.1 m
f/4	f/4.0	15.5 m
f/5.6	f/5.6	11.1 m
f/8	f/8.0	7.77 m

Diffraction & pixel pitch#

With 5.98 µm pixels, diffraction starts to soften pixel-level detail around f/8.9. For maximum sharpness keep landscapes between f/4.9 and f/9; stopping down further trades detail for depth of field.

Aperture	Airy disk diameter	Spread over	At 100% view
f/2.8	3.8 µm	0.6 px	sharp
f/4	5.4 µm	0.9 px	sharp
f/5.6	7.5 µm	1.3 px	sharp
f/8	10.7 µm	1.8 px	sharp
f/11	14.8 µm	2.5 px	slight softening
f/16	21.5 µm	3.6 px	visibly soft
f/22	29.5 µm	4.9 px	visibly soft

Maximum print sizes#

At 24.6 MP the Sigma fp produces 6,000 × 4,000 pixel images. See the 24 megapixel guide or the print size calculator.

Resolution	Typical use	Inches	Centimetres
300 DPI	Photo-lab quality	20.0 × 13.3 in	51 × 34 cm
240 DPI	Fine-art inkjet	25.0 × 16.7 in	64 × 42 cm
200 DPI	Wall print	30.0 × 20.0 in	76 × 51 cm
150 DPI	Poster, viewed from 1 m+	40.0 × 26.7 in	102 × 68 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
14 mm (14 mm eq.)	35.6 s	17.3 s	19.8 s	22.8 s
20 mm (20 mm eq.)	24.9 s	12.1 s	13.9 s	16.0 s
24 mm (24 mm eq.)	20.8 s	10.1 s	11.6 s	13.3 s
35 mm (35 mm eq.)	14.2 s	6.9 s	7.9 s	9.1 s
50 mm (50 mm eq.)	10.0 s	4.8 s	5.5 s	6.4 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
24 mm	1/25 s	0.3 s	1.3 s
50 mm	1/50 s	1/6 s	0.6 s
100 mm	1/100 s	1/13 s	0.3 s
199 mm	1/200 s	1/25 s	1/6 s

Lenses for the Sigma fp#

Native L-Mount lenses in our database (55 total). Also adaptable: Leica M, T-mount (T2), M42 screw mount, Deckel (DKL), M39 / LTM (Leica thread).

Laowa 9mm f/2.8 Zero-D 9 mm
Laowa 9mm f/5.6 FF RL 9 mm
Laowa 10mm f/2.8 Zero-D FF 10 mm
Sigma 10-18mm F2.8 DC DN | Contemporary 023 10–18 mm
Panasonic S 14-28mm f/4-5.6 Macro 14–28 mm
Sigma 14-24mm F2.8 DG DN | Art 019 14–24 mm
Laowa 15mm f/2.0 Zero-D 15 mm
Panasonic S Pro 16-35mm f/4 16–35 mm
Sigma 16-28mm F2.8 DG DN | Contemporary 022 16–28 mm
Sigma 16-300mm F3.5-6.7 DC OS | C 16–300 mm
Sigma 16mm f/1.4 DC DN Contemporary 16 mm
Viltrox AF 16mm F1.8 FE/L/Z 16 mm
Sigma 17mm F4 DG DN | Contemporary 023 17 mm
Leica Elmarit-TL 1:2.8/18 Asph. 18 mm
Panasonic S 18-40mm f/4.5-6.3 18–40 mm
Sigma 18-50mm F2.8 DC DN | Contemporary 021 18–50 mm
Panasonic S 20-60mm f/3.5-5.6 20–60 mm
Sigma 20-200mm F3.5-6.3 DG | Contemporary 20–200 mm
Sigma 20mm F2 DG DN | Contemporary 022 20 mm
Leica Summicron-TL 1:2/23 Asph. 23 mm
Viltrox AF 23mm F1.4 XF/Z/L 23 mm
Leica Vario-Elmarit-SL 1:2.8-4/24-90 ASPH. 24–90 mm
Leica Vario-Elmarit-SL 1:2.8/24-70 Asph. 24–70 mm
Panasonic S 24-105mm f/4 Macro OIS 24–105 mm
Panasonic S 24-60mm f/2.8 24–60 mm
Panasonic S 24mm f/1.8 24 mm
Sigma 24-70mm F2.8 DG DN II | Art 024 24–70 mm
Sigma 24-70mm F2.8 DG DN | Art 019 24–70 mm
Sigma 24mm F2 DG DN | Contemporary 021 24 mm
Sigma 24mm F3.5 DG DN | Contemporary 021 24 mm
Sigma 24mm f/1.4 DG HSM | A 24 mm
Panasonic S 28–200mm f/4–7.1 Macro OIS 28–200 mm
Sigma 28-70mm F2.8 DG DN | Contemporary 021 28–70 mm
Sigma 28mm F1.4 DG HSM | Art 28 mm
Sigma 30mm f/1.4 DC DN 30 mm
Leica APO-Summicron-SL 1:2/35 Asph. 35 mm

Similar cameras#

Other Full frame (35 mm) cameras from around the same time.

Frequently asked questions#

What is the crop factor of the Sigma fp?

The Sigma fp has a crop factor of 1.00× relative to 35 mm full frame (diagonal 43.1 mm vs 43.3 mm).

What size is the Sigma fp sensor?

35.9 × 23.9 mm (Full frame (35 mm)), an area of 858 mm² — 99% of full frame.

Is the Sigma fp full frame?

Yes — its sensor is the same 36 × 24 mm size as 35 mm film.

How many megapixels does the Sigma fp have?

24.6 megapixels (6,000 × 4,000 pixels), enough for a 20 × 13 inch print at 300 DPI.

What lens mount does the Sigma fp use?

The Sigma fp uses the L-Mount (flange distance 20.00 mm).

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

With a 20 mm lens (20 mm equivalent) the 500 rule gives 25 s and the stricter NPF rule at f/2.8 gives 14 s.

Sources & licences#

Wikipedia: Sigma fp — CC BY-SA 4.0
Wikidata Q74861225 — CC0
Lensfun camera database — CC BY-SA 3.0

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