Micro Four Thirds has been quietly evolving while most attention has gone to full frame cameras. The question is no longer whether the smaller format can compete, but what unique strengths it offers. For anyone shooting both landscapes and wildlife, the conversation around weight, reach, and practicality has become impossible to ignore.
Coming to you from Ian Worth, this thoughtful video breaks down why Micro Four Thirds might deserve a place in your camera bag. Worth compares his long-time Fujifilm X system with the OM System OM-1 Mark II, explaining how the smaller sensor size brings surprising advantages, especially for wildlife. The crop factor doubles the effective focal length, meaning a compact 50mm behaves like a 100mm lens. This allows for much lighter telephoto setups while keeping strong image quality. Worth is clear that Micro Four Thirds isn’t about replacing full frame; it’s about adding flexibility. Each format serves a different purpose, and for photographers balancing travel, hiking, and shooting time, smaller gear can make a real difference.
What’s most interesting is how Worth approaches balance rather than brand loyalty. He has no plans to abandon Fuji, but instead views the Micro Four Thirds system as an additional tool. When he heads out to capture wildlife, the OM kit fits better. The autofocus suits fast-moving subjects, and those long telephoto lenses weigh far less than their full frame equivalents. Running both systems side by side gives him the freedom to adapt. It also builds in redundancy: a second camera that still handles both stills and video well. The takeaway isn’t about switching camps, but about removing limits.
Worth also addresses the long-running “Micro Four Thirds is dead” claim. He calls that out as a misconception. If the format were dying, companies wouldn’t keep releasing new models like the OM-1 Mark II or refining lenses for it. The truth is that Micro Four Thirds caters to a more specific audience—those who value portability and reach over sensor size bragging rights. When he first picked up the small Panasonic GX80, it wasn’t just curiosity. It was a realization that the smaller format could serve daily shooting in a way larger gear couldn’t. It fits easily in a bag, draws less attention, and keeps creative work spontaneous.
Later in the video, Worth tackles resolution concerns. The OM-1 Mark II offers 20 megapixels, which some dismiss as low. He argues otherwise. For his landscape and macro work, composition matters more than cropping, and a well-framed 20-megapixel file prints cleanly at A3 or larger. When needed, upscaling tools like Gigapixel or Lightroom’s Super Resolution extend that flexibility further. What matters most, he says, is the lens. Sharp, well-built optics make far more difference than a few extra megapixels. He plans to test more OM lenses soon, including some long glass for wildlife and sharper primes for landscapes. Check out the video above for the full rundown from Worth.
7 Comments
"those long telephoto lenses weigh far less than their full frame equivalents" <- this just isn't true. Canon's full-frame 100-400 lens is 1.4 lb / 635 g. OM's MFT 50-200 is 2.8 lb / 1250 g.
That's not evidence that full-frame lenses are always lighter, but it illustrates a point... the full-frame lens is lighter because it has different design priorities, and the sensor size didn't make a difference at all.
When I've tested these lenses, equivalent focal lengths, apertures, optical quality, and weatherproofing produce roughly equal size and weight lenses regardless of the sensor size. The fact is, telephoto lens design depends entirely on the light being gathered and not much at all on the sensor size the light is projected upon.
Why are you comparing the pro-level (heavier) OM lens to Canon's travel/budget (lighter) lens of the equivalent field of view? In that apples to oranges comparison yes, the OM lens weighs more. But if you were making the honest apples to apples comparison, with Canon's pro level lens of the same focal range, the Canon lens weighs ~ 400g more than the OM lens. This all comes off as rather dishonest given the cherry-picked point of comparison that is clearly not a pro lens to pro lens comparison.
He compared similar light gathering, depth of field, and effective focal lengths. Nothing dishonest about that.
There are definitely reasons to shoot M43. Compactness and portability aren't really great reasons anymore.
You are completely wrong. He said that AFTER matching up the other characteristics of the lens, including weatherproofing and optical quality, that sensor size doesn't matter. Except that he didn't match up weatherproofing and optical quality. He compared a pro lens to a budget/travel lens. Not at all the same level of weatherproofing or optical quality.
The Nikon Z 100-400mm f4.5-5.6 S lens is only about 200g heavier, is faster at the short end and about $1000 less expensive.
Still 200g heavier. And no, it isn't faster. Mental gymnastic "equivalence" math does not make a full frame 4.5 faster than a m4/3 2.8. Yes the full frame 4.5 gathers more total light, and has shallower depth of field. These things are affected by equivalence. But it is NOT faster. It is irrefutably about 1.5 stops SLOWER.
So the significantly slower full frame lens still winds up heavier than it's 1.5 stop faster m4/3 counterpart.
Save your back, wallet, and your time. No amount of reasonable logic is going to have an impact on the minds of some acolytes.