General

Model

10x25 Blackhawk
Echo 10 30x21 Zoom
Optical Inc 6x18 T

Manufacturer

Barska
Brunton
Zeiss

Amazon rating

3.7
3.0
4.3

Customer reviews on Amazon

213
21
3

Basic Info

Type

Monoculars
Monoculars
Monoculars

Optical specifications

Prism Type

Magnification

10x
10.0 - 30.0x
6x

Objective Lens Diameter

25mm
21 mm
18mm

Angle of View

5.8
6.9

Field of View

303' at 1000 yd (101 m at 1000 m)
178 - 10 ft (54 - 3 m) at 1000 yd
360' (120 m at 1000 m)

Exit Pupil Diameter

2.5 mm
2.4 - 1.8 mm
3.0mm

Eye Relief

11 mm
12 mm
15mm

Minimum Focus Distance

13 ft (4 m)
10 ft (3 m)
1.0' (0.3 m)

Interpupillary Adjustment

Dioptric Correction

Focus Type

Physical specifications

Waterproof

Fogproof

Power Source

Dimensions

1.25 x 1.25 x 4.25 (3.2 x 3.2 x 10.8 cm)
4.25 x 1.25" (11 x 3 cm)
1.2 x 3.7" (30 x 94mm) WxH

Weight

5 oz (142 g)
3.2 oz (91 g)
0.13 lb (58g)

Tripod Socket

Packaging Info

Box Dimensions (LxWxH)

5.0 x 2.2 x 1.9"
7.4 x 6.1 x 2.75"
5.7 x 4.1 x 2.7"

Package Weight

0.35 lb
0.35 lb
0.5 lb