Explore Scientific BT-120 SF with 62° LER Eyepieces 20mm

Explore Scientific BT-120 SF with 62° LER Eyepieces 20mm

Description

The Explore Scientific BT-120 SF is a powerful binocular telescope designed for immersive visual observation of celestial and terrestrial targets. With dual 120 mm air-spaced achromatic lenses and fully multicoated optics, it offers sharp, contrast-rich views even in low light conditions.

Each optical path acts as a full-fledged refractor telescope, delivering twice the light-gathering capability of a single monocular instrument. The fast focal ratio of f/5.5 combined with the included pair of 20 mm Explore Scientific 62° LER eyepieces provides a 33x magnification and a 1.8° true field of view, ideal for observing star clusters, nebulae, the Moon, planets, ships, wildlife, and more.

The built-in 45° viewing angle allows for relaxed, fatigue-free use even when pointing high into the sky. Each eyepiece has individual helical focusers and is securely mounted in precision brass compression rings. The binoculars accept all standard 1.25" eyepieces, allowing magnifications from about 25x to 75x.

The magnesium housing is IPX6-rated for water resistance and nitrogen-filled to prevent internal fogging. Retractable dew shields help reduce stray light and protect the optics in humid conditions. A central carrying handle is included for easy transport and safe mounting.

Optional accessories include a dedicated U-mount with field tripod for stable and vibration-free support during extended sessions.

Specifications

• 120 mm air-spaced achromatic objectives

• 660 mm focal length, f/5.5

• Fully multicoated optics (EMD coatings)

• BaK-4 prism system for bright, sharp views

• Comfortable 45° viewing angle

• Pair of Explore Scientific 20 mm 62° LER eyepieces included (33x)

• True field of view: 1.8°

• Apparent field of view: 62°

• Long eye relief (15 mm), foldable silicone eyecups

• Accepts standard 1.25" eyepieces

• Compatible with 1.25" astronomical filters (paired use)

• Individual helical focuser for each eyepiece

• Magnesium body, IPX6 waterproof rating, nitrogen-purged

• Retractable dew shields to prevent fogging

• Central carrying handle

• Tripod mounting: two 1/4" and one 3/8" thread

• Recommended: Explore Scientific U-Mount with tripod (Art. 0114300)

Additional Information

• Supplied magnification: 33x

• Eye relief: 15 mm

• Interpupillary distance: 54 to 76 mm

• Minimum focus distance: 35 m

• Dimensions: 654 × 290 × 156 mm

• Weight (with accessories): 8.3 kg

• Optical tube color: white

• Housing material: Magnesium

• Waterproof: Yes, IPX6

• Nitrogen-filled: Yes