About mftm43
A reference site for the Micro Four Thirds system — independent, ad-free, and obsessively detailed.
What is Micro Four Thirds?
Micro Four Thirds (MFT) is an open mirrorless camera standard jointly developed by Olympus (now OM Digital Solutions) and Panasonic, introduced in 2008. It defines both the sensor size — 17.3 × 13 mm, roughly a quarter the area of full-frame — and the lens mount, enabling any MFT lens to work on any MFT body regardless of brand.
That openness has produced one of the richest lens ecosystems in mirrorless photography: over 100 native lenses spanning everything from ultra-wide primes to 800mm-equivalent super-telephotos, with contributions from Olympus, Panasonic, Sigma, Voigtländer, and others.
The case for a small sensor
The 2× crop factor is often framed as a limitation. In practice, it's a design constraint that unlocks real advantages:
- Size and weight. Optics scale with sensor size. A 300mm-equivalent MFT lens can be dramatically smaller and lighter than its full-frame counterpart — meaningful on long hikes or travel days.
- Reach. That same crop factor doubles your effective focal length. A 200mm lens becomes 400mm equivalent — ideal for wildlife and sport at a fraction of the cost.
- Depth of field. Deeper depth of field at equivalent framing makes zone focusing easier and gives videographers more latitude to keep subjects sharp without constant pulling.
- Weather sealing at lower prices. Bodies like the OM-5 and GH6 offer serious weather resistance at mid-range prices — a category that barely exists in larger formats.
- Video. MFT has a disproportionate presence in video — Panasonic's GH series set benchmarks for years, and the sensor size suits the rolling shutter characteristics of many video codecs.
Why this site?
Choosing a Micro Four Thirds body is harder than it should be. The system spans 15+ years and nearly 90 cameras across Olympus, Panasonic, and a handful of OEM partners. Specs are scattered across press releases, manufacturer pages, and review sites — each with different formats, different omissions, and varying accuracy.
mftm43 puts every camera in one table, with consistent columns and honest gaps (marked — rather than guessed). Sort by sensor generation, filter by brand, select two cameras and compare them column by column.
No ads. No affiliate links. No agenda beyond having a useful reference that didn't exist.
Data & accuracy
Specs are sourced from manufacturer press releases and official product pages. Where sources disagree, the more conservative or verifiable figure is used.
The database is a snapshot — camera specs don't change, but omissions do get filled in. If you spot an error or a missing camera, the data lives in a structured file and corrections are straightforward.