Olympus OM-D E-M5 Mark III Specs, Sensor Size & Crop Factor

Q: What is the crop factor of the Olympus OM-D E-M5 Mark III?

The Olympus OM-D E-M5 Mark III has a crop factor of 2.00× relative to 35 mm full frame (diagonal 21.6 mm vs 43.3 mm).

2.00×

Crop factor

17.3×13.0 mm

Sensor size

225 mm²

Area · 26% of full frame

20.2 MP

Resolution

3.34 µm

Pixel pitch

f/5.0

Diffraction-limited aperture

2019

Release year

Specifications#

Brand: Olympus
Model: OM-D E-M5 Mark III
Also known as: E-M5 III, E-M5MarkIII
Camera type: Mirrorless
Released: 2019-10-17
Lens mount: Micro Four Thirds
Sensor size: 17.3 × 13.0 mm (Four Thirds / Micro Four Thirds)
Crop factor: 2.00×
Resolution: 20.2 MP (5,184 × 3,888 px)
Fastest shutter: 1/8,000 s
Continuous shooting: 10 fps
Weight: 366 g (12.9 oz)
Sensor type: CMOS
AF points / area: 121 focus points
Dimensions: 125.3 x 85.2 x 49.7mm
Launch price: $1,199.99 (body only); $1,799.99 (with Olympus 14-150mm F4-5.6 II lens)
Drive: 10 frames per second (30 fps with electronic shutter)

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

Sensor size compared#

The Olympus OM-D E-M5 Mark III sensor (highlighted) drawn to scale against common formats. Its area is 26% of a full-frame sensor, which collects about 1.9 stops less total light at the same exposure.

Focal length equivalents & field of view#

Multiply any focal length by 2.00 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
8 mm	16 mm	94.5°	78.2°	107.0°
10 mm	20 mm	81.7°	66.0°	94.5°
12 mm	24 mm	71.6°	56.9°	84.1°
14 mm	28 mm	63.4°	49.8°	75.4°
16 mm	32 mm	56.8°	44.2°	68.1°
18 mm	36 mm	51.3°	39.7°	62.0°
20 mm	40 mm	46.8°	36.0°	56.8°
24 mm	48 mm	39.6°	30.3°	48.5°
28 mm	56 mm	34.3°	26.1°	42.3°
35 mm	70 mm	27.8°	21.0°	34.4°
40 mm	80 mm	24.4°	18.5°	30.3°
50 mm	100 mm	19.6°	14.8°	24.4°
56 mm	112 mm	17.6°	13.2°	21.9°
70 mm	140 mm	14.1°	10.6°	17.6°
85 mm	170 mm	11.6°	8.7°	14.5°
100 mm	200 mm	9.9°	7.4°	12.4°
135 mm	270 mm	7.3°	5.5°	9.2°
200 mm	400 mm	5.0°	3.7°	6.2°
300 mm	600 mm	3.3°	2.5°	4.1°
400 mm	800 mm	2.5°	1.9°	3.1°
600 mm	1200 mm	1.7°	1.2°	2.1°

Depth of field table#

Total depth of field at each subject distance, using a circle of confusion of 15.0 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
11 mm	f/1.8	11.0 cm	46.4 cm	2.21 m	7.21 m	∞	∞	4.49 m
11 mm	f/2.8	17.5 cm	77.9 cm	5.28 m	∞	∞	∞	2.89 m
11 mm	f/4	25.8 cm	1.29 m	148 m	∞	∞	∞	2.03 m
11 mm	f/8	63.4 cm	52.5 m	∞	∞	∞	∞	1.02 m
22 mm	f/1.8	2.7 cm	10.9 cm	44.7 cm	1.03 m	3.01 m	16.1 m	17.9 m
22 mm	f/2.8	4.2 cm	17.1 cm	70.8 cm	1.66 m	5.31 m	69.3 m	11.5 m
22 mm	f/4	5.9 cm	24.6 cm	1.04 m	2.57 m	9.97 m	∞	8.09 m
22 mm	f/8	12.0 cm	51.5 cm	2.58 m	9.75 m	∞	∞	4.05 m
37 mm	f/1.8	0.9 cm	3.8 cm	15.5 cm	35.2 cm	98.9 cm	4.09 m	50.7 m
37 mm	f/2.8	1.4 cm	5.9 cm	24.2 cm	55.0 cm	1.56 m	6.75 m	32.6 m
37 mm	f/4	2.0 cm	8.5 cm	34.7 cm	79.3 cm	2.28 m	10.8 m	22.8 m
37 mm	f/8	4.1 cm	17.0 cm	71.0 cm	1.67 m	5.37 m	73.8 m	11.4 m
62 mm	f/1.8	0.3 cm	1.3 cm	5.4 cm	12.4 cm	34.7 cm	1.40 m	142 m
62 mm	f/2.8	0.5 cm	2.1 cm	8.5 cm	19.3 cm	54.1 cm	2.20 m	91.6 m
62 mm	f/4	0.7 cm	2.9 cm	12.1 cm	27.6 cm	77.6 cm	3.18 m	64.1 m
62 mm	f/8	1.4 cm	5.9 cm	24.3 cm	55.5 cm	1.58 m	6.87 m	32.1 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 22 mm
f/1.2	f/2.4	26.9 m
f/1.4	f/2.8	23.1 m
f/1.8	f/3.6	17.9 m
f/2	f/4.0	16.2 m
f/2.8	f/5.6	11.5 m
f/4	f/8.0	8.09 m
f/5.6	f/11.2	5.78 m
f/8	f/16.0	4.05 m

Diffraction & pixel pitch#

With 3.34 µm pixels, diffraction starts to soften pixel-level detail around f/5.0. For maximum sharpness keep landscapes between f/2.8 and f/5; stopping down further trades detail for depth of field.

Aperture	Airy disk diameter	Spread over	At 100% view
f/2.8	3.8 µm	1.1 px	sharp
f/4	5.4 µm	1.6 px	sharp
f/5.6	7.5 µm	2.3 px	slight softening
f/8	10.7 µm	3.2 px	visibly soft
f/11	14.8 µm	4.4 px	visibly soft
f/16	21.5 µm	6.4 px	visibly soft
f/22	29.5 µm	8.8 px	visibly soft

Maximum print sizes#

At 20.2 MP the Olympus OM-D E-M5 Mark III produces 5,184 × 3,888 pixel images. See the 20 megapixel guide or the print size calculator.

Resolution	Typical use	Inches	Centimetres
300 DPI	Photo-lab quality	17.3 × 13.0 in	44 × 33 cm
240 DPI	Fine-art inkjet	21.6 × 16.2 in	55 × 41 cm
200 DPI	Wall print	25.9 × 19.4 in	66 × 49 cm
150 DPI	Poster, viewed from 1 m+	34.6 × 25.9 in	88 × 66 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
7 mm (14 mm eq.)	35.7 s	23.3 s	28.3 s	34.3 s
10 mm (20 mm eq.)	25.0 s	16.3 s	19.8 s	24.0 s
12 mm (24 mm eq.)	20.8 s	13.6 s	16.5 s	20.0 s
18 mm (36 mm eq.)	13.9 s	9.1 s	11.0 s	13.3 s
25 mm (50 mm eq.)	10.0 s	6.5 s	7.9 s	9.6 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
12 mm	1/25 s	0.3 s	1.3 s
25 mm	1/50 s	1/6 s	0.6 s
50 mm	1/100 s	1/13 s	0.3 s
100 mm	1/200 s	1/25 s	1/6 s

Lenses for the Olympus OM-D E-M5 Mark III#

Native Micro Four Thirds lenses in our database (100 total). Also adaptable: T-mount (T2), M39 / LTM (Leica thread), M42 screw mount, Deckel (DKL).

Olympus M.Zuiko Digital ED 7-14mm f/2.8 Pro 7–14 mm
Panasonic G Vario 7-14mm f/4.0 Asph. 7–14 mm
Laowa 7.5mm f/2.0 7.5 mm
Samyang 7.5mm f/3.5 UMC Fish-eye MFT 7.5 mm
Olympus M.Zuiko Digital ED 8-25mm f/4.0 PRO 8–25 mm
Olympus M.Zuiko Digital ED 8mm f/1.8 Fisheye Pro 8 mm
Panasonic Leica DG Vario-Elmarit 8-18mm f/2.8-4 Asph. 8–18 mm
Samyang 8mm f/3.5 Fish-Eye CS 8 mm
Laowa 9mm f/2.8 Zero-D 9 mm
Olympus M.Zuiko Digital ED 9-18mm f/4.0-5.6 9–18 mm
Panasonic Leica DG Summilux 9mm f/1.7 Asph. 9 mm
Panasonic Leica DG Vario-Summilux 10-25mm f/1.7 Asph. 10–25 mm
Samyang 10mm f/2.8 ED AS NCS CS 10 mm
OM System 12-100mm F4.0 12–100 mm
OM System 12-45mm F4.0 12–45 mm
Olympus M.Zuiko Digital ED 12-100mm f/4.0 IS Pro 12–100 mm
Olympus M.Zuiko Digital ED 12-200mm f/3.5-6.3 12–200 mm
Olympus M.Zuiko Digital ED 12-40mm f/2.8 Pro 12–40 mm
Olympus M.Zuiko Digital ED 12-45mm f/4.0 Pro 12–45 mm
Olympus M.Zuiko Digital ED 12-50mm f/3.5-6.3 EZ 12–50 mm
Olympus M.Zuiko Digital ED 12mm f/2.0 12 mm
Panasonic G Vario 12-32mm f/3.5-5.6 Asph. Mega OIS 12–32 mm
Panasonic G Vario 12-60mm f/3.5-5.6 Asph. Power OIS 12–60 mm
Panasonic G X Vario 12-35mm f/2.8 Asph. Power OIS 12–35 mm
Panasonic G X Vario 12-35mm f/2.8 II Asph. Power OIS 12–35 mm
Panasonic Leica DG Vario-Elmarit 12-60mm f/2.8-4.0 Asph. Power OIS 12–60 mm
Samyang 12mm f/2.0 NCS CS 12 mm
Olympus M.Zuiko Digital 14-42mm f/3.5-5.6 II 14–42 mm
Olympus M.Zuiko Digital ED 14-150mm f/4.0-5.6 14–150 mm
Olympus M.Zuiko Digital ED 14-150mm f/4.0-5.6 II 14–150 mm
Olympus M.Zuiko Digital ED 14-42mm f/3.5-5.6 14–42 mm
Olympus M.Zuiko Digital ED 14-42mm f/3.5-5.6 EZ 14–42 mm
Olympus M.Zuiko Digital ED 14-42mm f/3.5-5.6 II R 14–42 mm
Olympus M.Zuiko Digital ED 14-42mm f/3.5-5.6 L 14–42 mm
Panasonic G 14mm f/2.5 Asph. 14 mm
Panasonic G 14mm f/2.5 Asph. + GWC1 0.79× 14 mm

Similar cameras#

Other Four Thirds / Micro Four Thirds cameras from around the same time.

Frequently asked questions#

What is the crop factor of the Olympus OM-D E-M5 Mark III?

The Olympus OM-D E-M5 Mark III has a crop factor of 2.00× relative to 35 mm full frame (diagonal 21.6 mm vs 43.3 mm).

What size is the Olympus OM-D E-M5 Mark III sensor?

17.3 × 13.0 mm (Four Thirds / Micro Four Thirds), an area of 225 mm² — 26% of full frame.

Is the Olympus OM-D E-M5 Mark III full frame?

No — its sensor is Four Thirds / Micro Four Thirds, which is 3.8× smaller in area than full frame.

How many megapixels does the Olympus OM-D E-M5 Mark III have?

20.2 megapixels (5,184 × 3,888 pixels), enough for a 17 × 13 inch print at 300 DPI.

What lens mount does the Olympus OM-D E-M5 Mark III use?

The Olympus OM-D E-M5 Mark III uses the Micro Four Thirds (flange distance 19.25 mm).

How long can I expose the night sky with the Olympus OM-D E-M5 Mark III?

With a 10 mm lens (20 mm equivalent) the 500 rule gives 25 s and the stricter NPF rule at f/2.8 gives 20 s.

Sources & licences#

Wikipedia: Olympus OM-D E-M5 Mark III — CC BY-SA 4.0
Wikidata Q78581560 — CC0
Lensfun camera database — CC BY-SA 3.0

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