Compare real-world fit, not spreadsheet noise.
Pick up to four products and tune the verdict around travel, hybrid work, wildlife, resale safety or pure value. GearAtlas weighs carry size, ecosystem cost, market timing and ownership risk in one calm decision surface.
Visual
Estimated
Ranked
OM System OM-3
Micro 4/3 / 620g
OM System OM-1 Mark II
Micro 4/3 / 599g
Workflow lens
OM System OM-3 and OM System OM-1 Mark II are nearly tied for travel and everyday carry.
Camera size studio
Relative body dimensions
Front, back and top views are drawn from external dimensions so the size relationship stays proportional.
View
Mode
OM System OM-3
Front view / 132 x 92mm
132 x 92 x 72mm
OM System OM-1 Mark II
Front view / 135 x 92mm
135 x 92 x 73mm
Width
Height
Depth
Weight
External dimensions and carry delta
OM System OM-3 is the narrowest (3mm less than OM System OM-1 Mark II), OM System OM-3 is the thinnest (1mm less than OM System OM-1 Mark II), OM System OM-1 Mark II is the lightest (21g less than OM System OM-3).
OM System OM-3
OM System OM-1 Mark II
Class benchmarks
Sensor comparison
Sensor size to scale
×2 crop
×2 crop
All 2 use Micro 4/3 sensors — sensor size is a wash here.
Decision matrix
Scores tuned for travel
Highlighted specs
Only specs that change the decision
Sensor
20MP stacked MFT
Stabilisation
8.5 stops
Weather sealing
IP53
Weather sealing
IP53
Community comparison
Owner consensus · not specsCommunity comparison appears once owners vote on these products — 6 more votes across the pair will unlock it.