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Olympus E-M5 III

Olympus · Micro 4/3 System · 2.00× crop

The Olympus E-M5 III uses the Micro 4/3 System mount with a 2.00× crop factor (about 17.3 × 13.0 mm sensor), 20.4 megapixels, announced in 2019. Below: equivalent focal lengths, maximum shutter speeds for sharp stars, a hyperfocal distance chart, compatible lenses and how to check the shutter count.

Mount
Micro 4/3 System
Crop factor
2.00×
Sensor (approx.)
17.3 × 13.0 mm
Resolution
20.4 MP
pixel pitch ≈ 3.32 µm
Announced
2019
Circle of confusion
0.015 mm

Equivalent focal length & field of view

Lens focal lengthFull-frame equivalentDiagonal FOVHorizontal FOV
8 mm16 mm107.0°94.5°
10 mm20 mm94.5°81.7°
12 mm24 mm84.1°71.6°
14 mm28 mm75.4°63.4°
16 mm32 mm68.1°56.8°
18 mm36 mm62.0°51.3°
20 mm40 mm56.8°46.8°
24 mm48 mm48.5°39.6°
28 mm56 mm42.3°34.3°
35 mm70 mm34.4°27.8°
50 mm100 mm24.4°19.6°
85 mm170 mm14.5°11.6°
135 mm270 mm9.2°7.3°
200 mm400 mm6.2°5.0°
300 mm600 mm4.1°3.3°
400 mm800 mm3.1°2.5°

Multiply by the 2.00× crop factor for the full-frame equivalent field of view.

Milky Way exposure: NPF and 500 rule

Focal lengthNPF @ f/1.8NPF @ f/2.8Strict NPF @ f/2.8500 rule
8 mm20.3 s24.7 s13.4 s31.2 s
10 mm16.3 s19.8 s10.7 s25.0 s
12 mm13.5 s16.5 s8.9 s20.8 s
14 mm11.6 s14.1 s7.7 s17.9 s
16 mm10.2 s12.3 s6.7 s15.6 s
18 mm9.0 s11.0 s6.0 s13.9 s
20 mm8.1 s9.9 s5.4 s12.5 s
24 mm6.8 s8.2 s4.5 s10.4 s
28 mm5.8 s7.1 s3.9 s8.9 s
35 mm4.6 s5.6 s3.1 s7.1 s

NPF = (35 × f-number + 30 × pixel pitch) ÷ focal length, with a pixel pitch of 3.32 µm (from 20.4 MP). The strict version (Michaud's detailed NPF for the galactic core) gives pin-point stars at 100% view; the 500 rule is a loose rule of thumb that shows trailing on modern sensors.

Hyperfocal distance chart

Focal lengthf/2.8f/5.6f/8f/11f/16
10 mm2.4 m1.2 m0.8 m0.6 m0.4 m
14 mm4.7 m2.3 m1.6 m1.2 m0.8 m
16 mm6.1 m3.1 m2.1 m1.6 m1.1 m
18 mm7.7 m3.9 m2.7 m2.0 m1.4 m
20 mm9.5 m4.8 m3.4 m2.4 m1.7 m
24 mm14 m6.9 m4.8 m3.5 m2.4 m
28 mm19 m9.4 m6.6 m4.8 m3.3 m
35 mm29 m15 m10 m7.5 m5.1 m

Focus at the hyperfocal distance and everything from half that distance to infinity is acceptably sharp (circle of confusion 0.015 mm). Use the hyperfocal calculator for other settings.

Maximum print size

Print resolutionInchesCentimeters
150 ppi34.8 × 26.1 in88 × 66 cm
200 ppi26.1 × 19.6 in66 × 50 cm
240 ppi21.7 × 16.3 in55 × 41 cm
300 ppi17.4 × 13.0 in44 × 33 cm

300 ppi suits close viewing; 150–200 ppi is plenty for large prints viewed from a distance.

Compatible lenses (120 in our database)

LensFocal lengthMax apertureMount
Olympus M.Zuiko Digital ED 7-14mm f/2.8 Pro7–14 mmf/2.8Micro 4/3 System
Olympus M.Zuiko Digital ED 8mm f/1.8 Fisheye Pro8 mmf/1.8Micro 4/3 System
Olympus M.Zuiko Digital ED 8-25mm f/4.0 PRO8–25 mmf/4Micro 4/3 System
Olympus M.Zuiko Digital ED 9-18mm f/4.0-5.69–18 mmf/4Micro 4/3 System
Olympus 9mm Body Cap Lens Fisheye9 mm—Micro 4/3 System
Olympus M.Zuiko Digital ED 12mm f/2.012 mmf/2Micro 4/3 System
Olympus M.Zuiko Digital ED 12-50mm f/3.5-6.3 EZ12–50 mmf/3.5Micro 4/3 System
Olympus M.Zuiko Digital ED 12-40mm f/2.8 Pro12–40 mmf/2.8Micro 4/3 System
Olympus M.Zuiko Digital ED 12-100mm f/4.0 IS Pro12–100 mmf/4Micro 4/3 System
Olympus M.Zuiko Digital ED 12-200mm f/3.5-6.312–200 mmf/3.5Micro 4/3 System
Olympus M.Zuiko Digital ED 12-45mm f/4.0 Pro12–45 mmf/4Micro 4/3 System
Olympus M.Zuiko Digital ED 14-42mm f/3.5-5.614–42 mmf/3.5Micro 4/3 System
Olympus M.Zuiko Digital ED 14-42mm f/3.5-5.6 L14–42 mmf/3.5Micro 4/3 System
Olympus M.Zuiko Digital 14-42mm f/3.5-5.6 II14–42 mmf/3.5Micro 4/3 System
Olympus M.Zuiko Digital ED 14-42mm f/3.5-5.6 II R14–42 mmf/3.5Micro 4/3 System
Olympus M.Zuiko Digital ED 14-150mm f/4.0-5.614–150 mmf/4Micro 4/3 System
Olympus M.Zuiko Digital ED 14-150mm f/4.0-5.6 II14–150 mmf/4Micro 4/3 System
Olympus M.Zuiko Digital ED 14-42mm f/3.5-5.6 EZ14–42 mmf/3.5Micro 4/3 System
Olympus M.Zuiko Digital 17mm f/2.8 Pancake17 mmf/2.8Micro 4/3 System
Olympus M.Zuiko Digital ED 17mm f/1.2 Pro17 mmf/1.2Micro 4/3 System
Olympus M.Zuiko Digital 17mm f/1.817 mmf/1.8Micro 4/3 System
Olympus M.Zuiko Digital ED 25mm f/1.2 Pro25 mmf/1.2Micro 4/3 System
Olympus M.Zuiko Digital 25mm f/1.825 mmf/1.8Micro 4/3 System
Olympus M.Zuiko Digital ED 30mm f/3.5 Macro30 mmf/3.5Micro 4/3 System
Olympus M.Zuiko Digital ED 40-150mm f/4.0-5.6 R40–150 mmf/4Micro 4/3 System
Olympus M.Zuiko Digital ED 40-150mm F2.8 Pro40–150 mmf/2.8Micro 4/3 System
Olympus M.Zuiko Digital ED 40-150mm f/2.8 PRO + 1.4× conv.40–150 mmf/2.8Micro 4/3 System
Olympus M.Zuiko Digital ED 45mm f/1.2 Pro45 mmf/1.2Micro 4/3 System
Olympus M.Zuiko Digital 45mm f/1.845 mmf/1.8Micro 4/3 System
Olympus M.Zuiko Digital ED 60mm f/2.8 Macro60 mmf/2.8Micro 4/3 System
Olympus M.Zuiko Digital ED 75mm f/1.875 mmf/1.8Micro 4/3 System
Olympus M.Zuiko Digital ED 75-300mm f/4.8-6.7 II75–300 mmf/4.8Micro 4/3 System
Panasonic Lumix G Vario 7-14mm f/4.0 Asph.7–14 mmf/4Micro 4/3 System
Samyang 7.5mm f/3.5 UMC Fish-eye MFT8 mmf/3.5Micro 4/3 System
Venus Laowa 7.5mm f/2.08 mmf/2Micro 4/3 System
TTArtisan 7.5mm f/2 Fisheye8 mmf/2Micro 4/3 System
Pergear 7.5mm f/2.88 mmf/2.8Micro 4/3 System
Panasonic Leica DG Vario-Elmarit 8-18mm f/2.8-4 Asph.8–18 mmf/2.8Micro 4/3 System
SLR Magic 8mm f/48 mmf/4Micro 4/3 System
Samyang 8mm f/3.5 Fish-Eye CS8 mmf/3.5Pentax KAF, Canon EF

Native and adapter-free compatible lenses from the Lensfun database. Third-party and adapted lenses may also work.

How to check the Olympus E-M5 III shutter count

Olympus and OM System bodies show shutter actuations in a hidden service menu; ExifTool does not usually report it. Search for your model's service-menu key sequence.

ExifTool tag: (service menu). Always test an original, unedited file straight from the card.

Where to buy

Compare new and used prices at these retailers:

B&H PhotoAmazonKEH (used)MPB (used)

Other Micro 4/3 System cameras

FAQ

What is the crop factor of the Olympus E-M5 III?
2.00×. A 24 mm lens frames like a 48 mm lens on full frame.
What shutter speed should I use for the Milky Way with the Olympus E-M5 III?
With a 8 mm lens at f/2.8, about 25 seconds keeps stars sharp (NPF rule).
How do I check the shutter count on the Olympus E-M5 III?
Olympus and OM System bodies show shutter actuations in a hidden service menu; ExifTool does not usually report it. Search for your model's service-menu key sequence.
Which lenses fit the Olympus E-M5 III?
Lenses for the Micro 4/3 System mount — 120 are listed above.