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-1 Mark II
Micro 4/3 / 599g
Sony A1
Full-frame / 620g
Workflow lens
Sony A1 is nearly tied for travel and everyday carry.
Sony A1 leads on video readiness by 14 points.
Sony A1 leads on resale strength by 22 points.
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-1 Mark II
Front view / 135 x 92mm
135 x 92 x 73mm
Sony A1
Front view / 132 x 92mm
132 x 92 x 72mm
Width
Height
Depth
Weight
External dimensions and carry delta
Sony A1 is the narrowest (3mm less than OM System OM-1 Mark II), Sony A1 is the thinnest (1mm less than OM System OM-1 Mark II), OM System OM-1 Mark II is the lightest (21g less than Sony A1).
OM System OM-1 Mark II
Sony A1
Class benchmarks
Sensor comparison
Sensor size to scale
×2 crop
×1 crop
Full-frame captures ~3.8× the sensor area of Micro 4/3, a real low-light and depth-of-field edge.
Decision matrix
Scores tuned for travel
Highlighted specs
Only specs that change the decision
Stabilisation
8.5 stops
Sensor
50MP stacked full-frame
Weather sealing
IP53
Burst
30fps
Community comparison
Owner consensus · not specsCommunity comparison appears once owners vote on these products — 6 more votes across the pair will unlock it.