From the June 2008 issue

Binocular 101: Prisms

What binoculars are best for you?
By | Published: June 23, 2008 | Last updated on May 18, 2023
Many readers have written to ask which binoculars are best for stargazing: those with Porro prisms or those with roof prisms. They’re easy to tell apart. Porro-prism binoculars have zigzag-shaped barrels, while roof-prism models have sleek, straight barrels.