Compact and lightweight, the Steiner Navigator delivers full-featured performance. Slim design and good balance make Navigators easy to carry – an excellent choice for viewing nature and wildlife while ashore, as well as navigational duties while aboard.
All Steiner binoculars include: Rain-guard eye-cup cover, objective lens covers, nylon web neck strap, and carry / storage case.
The 575 is our budget minded model. The big difference the 3531 has a slightly higher light transmission of around 91% and also has our N2 Nitrogen pressurized housing and is "waterproof submersible" to 6'. The 575 has a light transmission of around 88% and goes through a nitrogen bath but is not pressurized. It's waterproof but not submersible.