More compact, durable, and usually waterproof. They are the modern choice for hikers but can be pricier for the same glass quality.
Nitrogen-filled barrels prevent the internal glass from fogging up when you step from a warm car into the cold morning air. binoculars buying guide uk
Arthur noticed some binoculars were sleek and straight (), while others had a traditional "zigzag" shape ( Porro Prism ). More compact, durable, and usually waterproof