prism binoculars

prism binoculars

[′priz·əm bə′näk·yə·lərz]
(optics)
A type of binoculars, each half of which is a Kepler telescope that employs a Porro prism erecting system both to erect the image and to reduce the length of the instrument. Also known as prismatic binoculars.
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Items of interest for the marathon auction include: Apple iPhone4, 14K white gold ring band set, Garmin Nuvi 1490 5" GPS system, Ray-Ban Aviator sunglasses, vintage wood rocker, antique floral print settee, Miida Night-Owl Roof Prism binoculars with case, Smith Corona Sterling vintage portable manual typewriter with case, Sony Blu-Ray Disc/DVD player, Danby Wine Cooler, Ryobi P650 18v Pro Tip paint sprayer with battery and charger, HP Officejet 6500A Plus Bundle Edition wireless printer, Ninja NJ602C0 Pro System 1100 Blender, DeLonghi espresso machine, Hitachi 18v cordless power tool set, Whirlpool Estate dishwasher, Maytag Atlantis washing machine, KitchenAid built in side by side refrigerator freezer, plus much more.
The military source mentioned that the seized weapons included 45 machineguns, 13 Nato sniper rifles, 9 RPG launchers, 7 BKC machineguns, 3 mortars, 3 hand-made rockets, 14 pump-action rifles, 10 military pistols, 24 mortar shells, 32 RPG shells, 53 machinegun chargers, 30 sniper rifle chargers, 8 explosive devices, 10 grenades, 150 detonators, 1500 sniper rifle bullets, 5000 BKC machinegun bullets, 4200 machinegun bullets, 500 pistol bullets, 7 gas masks, 5 prism binoculars, 25 satellite wireless devices, 30 shields, in addition to materials for making explosive devices, explosives and large amounts of gunpowder, TNT templates, highly explosive C4 material, a field hospital and an amount of military equipment, stolen cars and registration licenses.
This is not to say that there are not many excellent roof prism binoculars in the market, but good quality roof prism designs tend to be expensive and cheaper models usually give poor images, certainly on astronomical objects.
Going a different route on the rangefinder/optics integration, the Bushnell Fusion 1600 ARC combines 10x42 BaK-4 roof prism binoculars with a built-in rangefinder capable of measuring distances as close as 10 yards and as far out as 1,600.
I recommend Roof Prism binoculars all the way (the one with straight barrels).
Don't leave spotting in low-light conditions to chance-invest in KOWA's Genesis 8X33 roof prism binoculars ($1,285; www.
INTRODUCED IN 2009, Leupold's Rogue Porro prism binoculars have become such a hit that the company has expanded the line this year with two new models.
Back to the popular preference for Roof Prism binoculars: in general, it requires more cost to make a Roof Prism binocular as good as a Porro Prism binocular.
Celestron's Traveler 10x25 Porro is a streamlined binocular that can be tucked away in a backpack or overnight bag and is comprised of compact, go-anywhere Porro and roof prism binoculars.
Newest are the SLC 7x42 and 10x42 roof prism binoculars.
In Part 1 of Understanding and Choosing Optics, we talked about resolution, contrast, the importance of exit pupil and the difference between Porro prism and roof prism binoculars.