Bushnell Natureview 10x40 Roof Prism Binoculars
The Bushnell Natureview binoculars offer would-be ornithologists a good option for an affordable price. Specifications include a Bak-4 roof prism design, a magnification and objective lens diameter of 10x42mm, field of view of 305 feet at 1000 yards, close focus to 12 feet, twist-up eye cups and eye relief to 17mm, fully multi-coated lenses, exit pupil size of 4.2mm, central focus system, water- and fog-proof, tripod adaptable, and a weight of 23 ounces. As of 2010, this model lists at $213.95. Bushnell also offers five other models in their Birding Series Binoculars.
820 Swift Audubon 8.5x44 Porro Prism Binoculars
This Swift Audubon porro prism binocular offers birders an excellent option for a slightly higher price. Though marginally heavier than most roof prism binoculars, this model makes up for it with a greater depth of view. Specifications include a magnification and objective lens diameter of 8.5x44mm, field of view of 430 feet at 1000 yards, close focus to 10 feet, eye relief to 16mm, fully multi-coated lenses, exit pupil size of 5.2mm, central focus system, water- and fog-proof, and a weight of 24 ounces. As of 2010, this model lists at $349.95. A 25-year warranty is offered.
Zeiss 8x42 Victory FL Binoculars
The Zeiss Victory FL binocular series offer a roof prism design for those who require the finest components available. Specifications include a magnification and objective lens diameter of 8x42mm, field of view of 405 feet at 1000 yards, close focus of 6.56 feet, eye relief to 16mm, fully multi-coated lenses, exit pupil size of 5.25mm, central focus system, water- and fog-proof, an armored housing, and a weight of 27.33 ounces. This model is useable in temperatures ranging from -22F to 145F. As of 2010, this model lists at $2,249.
