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General
Product Name: X-Trail 10 x 50 Binoculars
Brand: Barska
Model Number: AB10176
Color: Black
Imaging
Magnification: 10 times
Objective Lens Diameter: 50 millimeters (Generally, the larger the diameter of the objective lens, the greater the light-collecting power and the brighter images will appear.)
Field of View at 1000 yards: 324 feet (The area of a target, measured horizontally from the location of viewing, that can be observed.)
Close Focusing Distance: 33 feet (The closest distance the user can be from an object to obtain a clear, focused view through the lens.)
Features
Size: Full Size
Prism Type: Porro (Prisms ensure the proper horizontal and vertical orientation of the view. There are two main types: roof and Porro. Roof prisms, typically more expensive than the alternative, have a more streamlined design due to their glass elements being in line with one another. Porro prisms, though they contribute to a larger form factor, typically provide a wider field of view than roof prisms.)
Exit Pupil: 5 millimeters (The diameter of the beam of light that travels through the lens to the user's eye. Generally, the larger this measurement, the greater the relative brightness and detail of the image.)
Lens Coating: Coated (Chemical coatings on a lens reduce reflective light loss and improve light transmission. The different coating levels indicate the number of anti-reflective layers and the lens surfaces to which they're applied, ranging from coated (the most basic) to fully multi-coated (typical of high-end optics).)
Focus System: Center (The most common binocular focusing system is center focus, which features a centered wheel or lever (InstaFocus) between the barrels, and usually additional diopter adjustment. Individual focus binoculars allows each eyepiece to be adjusted independently.)
Eye Relief: 20 millimeters (The maximum distance between the eyepiece lens and user's eye at which the full field of view can be seen.)
Dimensions
Product Height: 8.25 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
Product Width: 3.25 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
Product Weight: 1.9 pounds (The out of box weight of the item.)
Other
UPC: 790272521265
These binoculars feature large objective lenses with BK-7 prism glass to maximize light transmission for bright, clear images, even in low-light conditions.
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Rated 5 out of 5 stars
Great Value
I bought these online, sight unseen. Their purpose was for football games as I am a public address announcer. The 50mm openings let in plenty of light while the ruby coating makes them look ultra cool and expensive. At 10 X magnification, I can easily see the numbers on the jerseys and the expressions on the referees faces! I had shopped around and comparable lenses at the same
specifications cost three times as much. These binoculars are clear, concise and the focus, both on the center frame and eyepiece are smooth and predictable. They are also great for star gazing, airplane identification, bird watching, and looking at the moon. I also had the chance to use them with low light conditions and they worked excellently! The only drawback is that the case is fabric and the strap is flimsy cloth. But At this low price, I can afford to buy a tough well made travel case myself!
Posted by Hooben
Rated 5 out of 5 stars
Lightweight & powerful
We got these binoculars for what would be a long day of whale watching. They are pretty lightweight, and didn't cause arm fatigue, and the magnification was excellent. Good ergonomics make them easy to focus and use.
Posted by Nicknair
Rated 5 out of 5 stars
seeing objects closer than they are
this is great!! love how you can see things really far, and focusing on them. this is a wonder ful product for seeing sights and for bird watching, overall i would go for this.