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Types of Binoculars
Standard Binoculars	A standard or full-size binocular can be used for everything from nature observation to spectator sports.
Compact Binoculars	Compact binoculars are smaller and lighter in weight and are a good choice to take along to the theaters or concerts or on hikes and hunting trips.
Wide-Angle Binoculars	Wide angle binoculars are ideal for tracking fast-moving action across wide areas such as football fields, racetracks and wilderness terrain.
Zoom Binoculars	A zoom binocular allows the user to increase the magnification in order to focus in on the details. From distant to near view, it´s the best of both worlds.
Waterproof Binoculars	Waterproof binoculars deliver clarity despite foul weather conditions including fog, rain and ice. O-ring sealed and nitrogen purged for reliable fog proof, waterproof performance.

Coated Optics
Lens surface coatings reduce light loss and glare due to reflection for a brighter, higher-contrast image with less eyestrain.
Types of Coatings
Coated	A single layer on at least one lens surface.
Fully Coated	A single layer on all air-to-glass surfaces.
Multi-Coated	Multiple layers on at least one lens surface.
Fully Multi-Coated	Multiple layers on all air-to-glass surfaces.

Focusing Systems
Insta Focus	A paddle or rocker bar between the barrels adjusts the lenses allowing for rapid focusing adjustment. Ideal for following subjects in motion.
Center Focus	A focus wheel between the barrels moves the lenses.
Perma Focus	Does not require focusing. The optics are preset and optimized for distant subjects and fine focusing is achieved via the users eyes.

Prism Systems
The prism system of a binocular reduces the size needed to provide focal length and turns what would be an upside-down image right-side-up. There are two types of prism systems, roof and porro.
Types of Prism Systems
Roof Prism System	In roof prism binoculars the prisms overlap closely, allowing the objective lenses to line up directly with the eyepiece. The result is a slim, stream-lined shape in which the lenses and prisms are in a straight line.
Porro Prism System	In porro prism binoculars the objective or front lens is offset from the eyepiece. Porro prism binoculars provide greater depth perception and generally offer a wider field of view.