How to Choose a Micro Four Thirds Camera
There are over two dozen active Micro Four Thirds bodies on the market. Most beginners overbuy or underbuy. This guide helps you cut through the specs and find what actually matters for how you shoot.
Start with what you shoot, not specs
The most common mistake when choosing a camera is buying specs instead of buying for your use case. A 25.2 megapixel sensor is irrelevant if you post to Instagram. 4K 60fps matters a lot if you edit video and very little if you shoot stills. Before looking at any camera, answer three questions: what do I shoot, where do I shoot it, and what is my budget?
The specs that actually move the needle
In-body image stabilisation (IBIS)
IBIS compensates for camera shake by moving the sensor. More stops of stabilisation means you can handhold at slower shutter speeds without blur. For handheld video and low-light stills, this is one of the most practically useful specs in the entire lineup. OM System bodies lead the format here: the <a href="/cameras/om-system-om-1-mark-ii/">OM-1 Mark II</a> is rated at 8.5 stops. Panasonic bodies range from 5 stops on entry-level bodies to 7.5 stops on the <a href="/cameras/panasonic-g9-ii/">G9 II</a> and <a href="/cameras/panasonic-gh7/">GH7</a>.
If you shoot handheld video or low-light portraits without a tripod, prioritise IBIS stops over almost anything else. If you shoot mostly on a tripod, IBIS matters less.
Autofocus system
Phase detection autofocus is faster and more reliable for tracking moving subjects than contrast detection alone. Subject recognition - which identifies faces, eyes, animals, and birds and locks focus automatically - is a step further. If you shoot sports, wildlife, or children, phase detection and subject recognition are not optional extras; they are the difference between getting the shot and missing it.
Entry-level bodies like the <a href="/cameras/panasonic-g100d/">Panasonic G100D</a> use contrast detection only. Mid-range and flagship bodies from both OM System and Panasonic use phase detection. Check the spec before assuming.
Sensor resolution
Most current Micro Four Thirds sensors sit at 20 or 25 megapixels. For everyday shooting, printing up to A3, or posting online, 20MP is more than adequate. The jump to 25MP is meaningful only if you crop heavily or print very large. Do not pay a premium for megapixels you will not use.
Weather sealing
Weather sealing protects against dust and moisture splash, but it only works when paired with a sealed lens. A sealed body with an unsealed lens is still exposed at the mount. If you shoot outdoors in unpredictable conditions, check both the body and the lenses you plan to use. OM System bodies tend to have strong sealing from the mid-range up; Panasonic seals its pro-tier bodies.
Video features
If you shoot video seriously, the specs that matter are 4K 60fps (smooth slow motion), log profiles (V-Log on Panasonic, OM-Log on OM System, for colour grading in post), and a headphone jack for audio monitoring. Panasonic's GH-series bodies are optimised for video and have historically led the format here. The GH7 supports 4K 60fps and internal ProRes RAW. The OM-1 Mark II shoots 4K 60fps but does not offer log. If video is secondary to stills, these specs have no effect on your work.
Budget tiers
Under $800: entry-level
This tier covers the Panasonic G100D and OM System OM-10. Both use 20MP sensors and produce excellent image quality. The G100D has a built-in electronic viewfinder; the OM-10 has 5-stop IBIS but no viewfinder. Neither has phase detection AF. If you are new to interchangeable-lens cameras and shoot mostly stills in decent light, either body will serve you well.
$800 to $1500: mid-range
The most practical tier for most photographers. The OM System OM-3 ($1499) offers phase detection AF, subject recognition, 7-stop IBIS, and weather sealing. The OM System OM-5 ($1199) is a compact weatherproof body aimed at travel and outdoor shooting. The Panasonic GH6 ($1497) targets video shooters with 4K 60fps and V-Log, though it uses contrast-detect AF.
$1500 and above: flagship
The OM System OM-1 Mark II ($2199) is the current stills flagship: 8.5-stop IBIS, phase detection AF, subject recognition, 4K 60fps, weather sealed to IP53. The Panasonic G9 II ($1797) and GH7 ($1997) are the stills/video flagships from Panasonic: phase detection AF, 7.5-stop IBIS, V-Log, 4K 60fps. The GH7 adds internal ProRes RAW. Buy into this tier only if you have specific reasons to need what entry or mid-range bodies cannot provide.
Panasonic or OM System?
Both brands use the same Micro Four Thirds mount, so lenses are interchangeable. The choice of body brand mostly determines which native lenses and accessories you prioritise, and which autofocus approach suits you.
- OM System: stronger IBIS across the lineup, better AF for moving subjects (phase detection + subject recognition from the OM-3 up), better weatherproofing on mid-range bodies, stronger for stills and outdoor use
- Panasonic: better video feature set (log profiles, frame rate options, GH-series cinema features), Dual IS when paired with Panasonic OIS lenses, stronger at mid-range video
For a detailed breakdown, see the Panasonic vs OM System guide.
What to ignore
- Burst rate: unless you shoot fast action professionally, 10fps is more than enough
- USB charging: convenient but not a reason to choose one body over another
- App connectivity: rarely used after the first week
- Body colour options: irrelevant to image quality
The short version
- Shoot wildlife or kids? Prioritise phase detection AF and subject recognition
- Shoot handheld video or low-light stills? Prioritise IBIS stops
- Shoot in rain or dust? Check weather sealing on both body and lenses
- Shoot video seriously? Look at Panasonic GH-series for log and frame rate options
- Shoot mostly stills in good light? Almost any current body will do the job