Porro Prism Binoculars
Also called: porro, traditional binoculars
Binoculars with the classic offset barrels. They give a wide view and good depth for the price, though they are bulkier.
- Type
- Binoculars
- Shape
- Wider body, with the objective lenses farther apart than the eyepieces
- Prisms
- Two Porro prisms in each barrel
- Typical sizes
- 7x35, 8x40, 10x50, and larger
- Strengths
- Strong sense of depth and good light for the money
- Used for
- Hunting, Birding & wildlife, Stargazing
What it is good for
- Birding and wildlife watching from a fixed spot.
- Buyers who want good optics on a budget.
- Stargazing with larger sizes such as 10x50.
Where it falls short
- Bulkier and heavier than roof prisms of the same power.
- The open shape can be harder to seal against water.
- Less handy in a small pack.
Tips
- Check that both barrels show the same image with no double vision.
Works well with
- Roof Prism Binoculars: slimmer and more compact.
- Astronomy Binoculars: the large Porro designs used for the night sky.
Field notes
The Porro layout gives the objective lenses a wider spacing than your eyes. That is part of why the image has a strong sense of depth.
Related guides
Specs here are typical, not guarantees; models differ, so check the maker's published numbers. Never look at the Sun through any optic without a certified solar filter, and zero or mount a scope with the firearm unloaded and pointed in a safe direction. Rules on optics, such as scopes on certain hunts or lasers and electronics, differ by state; our state resources directory links to each state's official regulations. Want a buying guide? Read Choosing Hunting Optics.