Roof vs Porro binoculars and the architecture trade behind the shape
Roof vs Porro binoculars are not a simple contest between a modern design and an old one. Prism architecture changes the light path and strongly influences body layout, but field of view, eye relief, sealing, weight, coatings, transmission, and durability still belong to the finished binocular. A roof design usually favors a straighter, narrower form,