กล้องสองตา Tasco Essentials 8x21 Compact Binocular

Tasco's best-selling Essentials line balances optical performance and quality construction, offering an affordable way to add a pair of high-quality binoculars to your household, pocket, or suitcase. The handsome, rubber-armored housing not only absorbs shock and protects them from bumps and bruises, it adds in a weather resistance factor should it decide to rain--or snow--at the big event.

With extra-powerful magnification, these compact binoculars are ideal for glassing long distances or examining small details.

• 21mm objective lens
• Roof prism system
• Field-of-view (at 1,000 yards): 383 feet/128M
• Features: Rubber fold-down eyecups, black rubber armor, carrying pouch and neck strap
• Weight: 6.5 ounces (184g)

 

Specifications

Prism Type:	Roof
Magnification:	8x
Objective Lens Diameter:	21mm
Angle of View:	58.4°
Field-of-View (@ 1000 Yds):	383' (128m at 1000 m)
Exit Pupil Diameter:	2.6mm
Relative Brightness:	6.9
Twilight Factor:	13.0
Focus Type:	Center
Weatherproofing:	Water resistant
Tripod Socket:	No
Eye relief:	15.1mm
Weight:	6.5 oz (184g)

 

Tech Talk

• Magnification: Magnification is indicated by the first number given. For instance, "7x" means that you will see an object seven times closer than if you were viewing with the naked eye.
• Objective Lens Diameter: The objective lens diameter is indicated by the second number (e.g., 21mm), which indicates how much light is able to enter the binocular. The larger this number is the better your sight will be in lower light conditions.
• Roof Prisms: Roof prism binoculars are streamlined and compact because they utilize trim roof-shaped prisms to elongate the light path. Roof prism binoculars are usually more expensive than equivalent porro prism models.