General

Model

10x25 Blackhawk
8x42 Oceana
Optics Viper HD 10x42

Manufacturer

Barska
Celestron
Vortex

Amazon rating

3.7
3.3
4.7

Customer reviews on Amazon

213
24
267

Basic Info

Type

Monoculars
Monoculars
Binoculars

Optical specifications

Prism Type

BaK-4 Roof
Roof

Magnification

10x
8x
10x

Objective Lens Diameter

25mm
42mm
42mm

Angle of View

5.8
7
6.1

Field of View

303' at 1000 yd (101 m at 1000 m)
376' at 1000 yd (183 m at 1000 m)
319' at 1000 yd / 105.91 m at 1000 m

Exit Pupil Diameter

2.5 mm
5.25 mm
4.2

Eye Relief

11 mm
18 mm
16.5

Minimum Focus Distance

13 ft (4 m)
42.6' (13 m)
5.1' / 1.55 m

Interpupillary Adjustment

59 - 75 mm / 2.32 - 2.95"

Dioptric Correction

Focus Type

Center

Physical specifications

Waterproof

Fogproof

Power Source

Dimensions

1.25 x 1.25 x 4.25 (3.2 x 3.2 x 10.8 cm)
5.8 x 5.3 x 1.65"

Weight

5 oz (142 g)
12 oz (340 g)
24.6 oz

Tripod Socket

Packaging Info

Box Dimensions (LxWxH)

5.0 x 2.2 x 1.9"
7.9 x 4.4 x 2.8"
8.75 x 7.3 x 4.1"

Package Weight

0.35 lb
1.1 lb
2.45 lb