Bushnell Powerview 10×25 Porro Prism Binoculars 139025 belong to well-known Bushnell Powerview Binoculars 
series.
These make a great gift for the bird lover on your list!
At prices that don’t make owing one of each out of the question. The porro-prism Powerview binocular is a combination of precision optics, durability and styling that will make the most of your time outdoors.
All binoculars are labeled with numbers delineating their size and magnification. These numbers might look like 10×25 (read as 10 by 25). The 10 in this example is the power or magnification. The 25 is the diameter (in millimeters) of the objective lens, the end through which light enters the binoculars. These numbers define only magnification and size and not any other aspects of the image or optics quality.
Full-size binoculars generally range from 7 to 12 power. The objective lenses range from about 30 to 50 millimeters in diameter. Of these sizes the most popular are powers from 8-10.5 with 40-50 millimeter objective lenses. The objective lens diameters for scopes are larger and the most popular top out at about 85 millimeters.
Product Specifications
| Power x Obj. Dia. | 10×25 |
| Field of View | 262 ft. @ 1000 yds. |
| Exit Pupil | 2.5 mm |
| Eye Relief | 11 mm |
| Dimensions | N/A |
| Close Focus | 9 ft. |
| Weight | 9.1 oz. |
| Weatherproofing | None |
| Prism Material | BK-7 |
| Coatings | Fully Coated |
| Armoring | Rubber |
| Eye Cups | Rubber Fold-down |
| Design Type | Reverse Porro Prism |