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
Canon EOS R3
Full-frame / 620g
Leica Q3
Full-frame / 743g
Workflow lens
Canon EOS R3 is nearly tied for travel and everyday carry.
Canon EOS R3 leads on AF confidence by 14 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
Canon EOS R3
Front view / 132 x 92mm
132 x 92 x 72mm
Leica Q3
Front view / 130 x 80mm
130 x 80 x 93mm
Width
Height
Depth
Weight
External dimensions and carry delta
Leica Q3 is the narrowest (2mm less than Canon EOS R3), Leica Q3 is the shortest (12mm less than Canon EOS R3), Canon EOS R3 is the thinnest (21mm less than Leica Q3), and Canon EOS R3 is the lightest (123g less than Leica Q3).
Fixed-lens bodies include their lens in the envelope; interchangeable bodies still need a lens attached.
Canon EOS R3
Leica Q3
Class benchmarks
Sensor comparison
Sensor size to scale
×1 crop
×1 crop
All 2 use Full-frame sensors — sensor size is a wash here.
Decision matrix
Scores tuned for travel
Highlighted specs
Only specs that change the decision
Sensor
24MP stacked full-frame
Sensor
60.3MP full-frame
Burst
30fps
Lens
28mm f/1.7 Summilux
Community comparison
Owner consensus · not specsCommunity comparison appears once owners vote on these products — 6 more votes across the pair will unlock it.