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A1 vs OM-D E-M1 Mark III

Quick take: The A1 has the highest resolution at 55MP; the OM-D E-M1 Mark III is the most affordable; only the OM-D E-M1 Mark III is weather sealed.

Different kinds of camera — their specs aren't comparable, so read the rows as facts, not a contest.

32 specs side by side·15 genres scored·UK prices from Wex Photo Video, Clifton Cameras, MPB, eBay and Amazon UK

How to read this page. Highlighted cells win that row on the spec alone. Genre scores are the engine's base scores (enthusiast, photo and video); Camera Match re-weights them for your level and priorities. Price buttons are affiliate links; the price you pay is the same.

Price buttons are affiliate links — GearFrame may earn a commission at no extra cost to you. It never affects a score. Learn more

Size comparedbody only, no lens · drawn to one scale
0 25 50 75 100 125 OM-D E-M1 Mark III 134 mm 91 mm A1 96 mm 81 mm
  • A1 96 × 81 × 141 mm · 249 g
  • OM-D E-M1 Mark III 134 × 91 × 69 mm · 580 g

The OM-D E-M1 Mark III is 38 mm wider, 10 mm taller, 72 mm slimmer and 331 g heavier than the A1.

Drawn to scale from the makers' dimensions (W × H × D). Front shown, depth on the slanted edge.

Full specificationsthe better value in each row is highlighted
Specification A1Antigravity · 2025OM-D E-M1 Mark IIIOlympus · 2020
Price £909£425 usedBest
Sensor —20.4MP Micro Four Thirds CMOS
Resolution 55.0MPBest20.4MP
Video 8KC4K/24p, 4K/30p, Full HD 1080p/120
Autofocus —121-point all cross-type on-sensor phase detect + contrast AF, face / eye detection, Starry Sky AF
Stabilisation —5-axis in-body stabilisation, 7 stops (7.5 with Sync IS)
Burst Rate —60fps (18fps with continuous AF)
Battery Life —~420 shots (CIPA)
Weight 249gBest580g (with battery)
Dimensions 96 × 81 × 141 mm134.1 × 90.9 × 68.9mm
Weather Sealed Not weather sealedYesBest
Viewfinder —OLED EVF, 2.36M dots, 1.48x
Screen —3.0" vari-angle touchscreen, 1.04M dots
Mount Fixed lens (360°, f/2.2)Micro Four Thirds
Memory Cards —Dual SD slots
Connectivity —USB-C (USB PD), micro HDMI, Wi-Fi, Bluetooth, 3.5mm mic & headphone jacks, RM-CB2 remote
Take-off weight 249 g—
Fly without registering Yes — under 250 g—
Flight time 24 min—
Wind resistance 10.7 m/s—
Obstacle sensing Omnidirectional—
Video link OmniLink 360—
Range 6.0 km—
Top speed 16.0 m/s—
Cameras 1—
RAW stills Yes—
Vertical shooting Not supported—
Intelligent flight Subject tracking, waypoints, return-to-home—
Storage 20 GB built in + microSD slot—
Controller in the box Vision goggles + Grip Motion Controller—
FPV Yes, goggles in the box—
Folds Yes—

Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.

How they score by genreengine base scores out of 10
Genre
A1
OM-D E-M1 Mark III
Portrait
—
6.7/10
Street
—
6.2/10
Travel
—
6.0/10
Wedding & Events
—
6.8/10
Vlogging & Video
—
5.2/10
Filmmaking
—
5.6/10
Documentary
—
6.5/10
Sports & Action
—
7.7/10
Landscape
—
5.9/10
Wildlife
—
7.9/10
Casual
—
4.8/10
Food
—
6.8/10
Macro
—
7.9/10
Architecture
—
6.0/10
Astrophotography
—
5.7/10

Scores come from the same engine as Camera Match: verified specifications weighted by what each genre needs, with documented adjustments. The product page and this table show the enthusiast base score. See how scores are calculated →

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