Explore Scientific Binoculars BT-70 SF (75543)

The Explore Scientific BT-70 SF binoculars are part of the BT Series, designed for rugged outdoor use. These binoculars feature an IPX6-rated sealed and nitrogen-filled construction, effectively preventing internal fogging even in challenging weather conditions. The lightweight magnesium housing reduces weight and enhances handling. Large binoculars like these function as double telescopes, providing each eye with its own complete lens system for full light-gathering power. This design delivers vivid images and ensures a more comfortable, relaxing observation experience compared to single eyepiece systems.

Specifications:
Capacity:

• Type of build: Porro prisms

• Magnification: 20x

• Front lens diameter (mm): 70

• Focal length (mm): 400

• Exit pupil (mm): 3.5

• Eye relief (mm): 15

• Eyepiece cups: Folding

• Interpupillary distance (mm): 54–76

• Glass material: BaK-4

• Lens coating: Fully multi-coated

• Focusing system: Single focusing

• Handle: Yes

Special Features:

• Zoom function: No

• Eyepieces for spectacle wearers: Yes

• Image stabilizer: No

• Compass: No

• Rangefinder: No

• Splash-proof: Yes

• Watertight: Yes

• Threaded tripod connector: Yes

• Lens cover and eyepiece cap included: Yes

• Inert gas charge (nitrogen-filled): Yes

Field of View and Close Focus:

• True field of view (°): 3.1

• Apparent field of view (°): 62

• Close focus limit (m): 12

General Information:

• Series: BT

• Body material: Magnesium

• Color: Black

• Dimensions (LxWxH in mm): 370 x 213 x 122

• Weight (g): 3400

Area of Application:

• Astronomy: Very good

• Bird watching, hunting, travel, sports, sailing, theatre: Not recommended

These binoculars are ideal for astronomy enthusiasts seeking high-quality optics for observing celestial objects with clarity and comfort.