DESCRIPTION
With the Explore Scientific BT-70 SF Large Binoculars, you'll unlock a new dimension of observing, whether you're gazing at the stars or enjoying the beauty of the world around you. Elevate your astronomy and nature viewing experiences with these versatile and high-quality binoculars.
Why choose the Explore Scientific BT-70 SF Large Binoculars (62° LER Eyepieces)?
1. Observe the beauty of the starry sky at night & distant objects in nature during the day
Globular star clusters, glowing gas nebulae, the moon with its craters and even planets can be observed wonderfully on a clear night. But also all other distant things in nature and landscape, even ships and airplanes can be seen in detail. With the all-round binoculars of the Explore Scientific BT series, you can get up very close. Thanks to the large, light-gathering lenses and the professional coatings on all lens surfaces, these binoculars produce bright and brilliant images even at night and at twilight, providing a special viewing pleasure. The comfortable 45 degree viewing angle allows fatigue-free use even when the binoculars are tilted strongly.
2. Outstanding image quality and dual lens power - A large binocular can also be called a double refractor telescope
One complete lens telescope with the full light gathering power is available per eye. Experience a whole new dimension of observing. Objects are reproduced almost vividly in these binoculars and observing with both eyes is basically very relaxed. Last but not least, this comfortable way of observation increases the recognition of the finest details and effectively prevents rapid eye fatigue.
3. Robust construction - Extremely robust binoculars with magnesium housing, sealed and filled with nitrogen
The BT series binoculars are designed for tough outdoor use. The IPX6 sealed and nitrogen-filled design effectively prevents fogging of the internal optics even under difficult weather conditions. The very light magnesium housing saves weight and makes it easy to handle. Two Explore Scientific 20mm eyepieces of the 62° LER series already included. Explore Scientific is an established manufacturer of extremely high-quality eyepieces in the astronomy scene. An optical system is only as good as its weakest component. Therefore these giant binoculars come with a pair of quality eyepieces of the 62° LER series. With an apparent field of view of 62 degrees and a focal length of 20mm, the BT-70 binoculars produce a 20x magnification. Thus these wide angle eyepieces offer a very good overview (field of view 3.1 degree) at moderate magnification. The large interpupillary distance of these LER (long eye relief) eyepieces of 15mm and soft silicone eyecups, which can be turned inside out, also guarantee a comfortable and relaxed view. For astronomy, a flat and sharp image field is advantageous and offers a particularly impressive viewing experience even during the day. Due to the waterproof design and the argon filling, these eyepieces are absolutely durable and easy to clean.
4. Quality Eyepieces included - Interchangeable eyepieces with 1.25 inch / 31.7mm plug-in diameter
Adjust the magnification and field of view to your individual needs and choose from a wide range of available eyepieces. All eyepiece types with a plug-in diameter of 1.25 inch / 31.7mm can be used with the binoculars of the BT series. Especially recommended are Explore Scientific eyepieces of the 62° & 82° series with focal lengths from 8 to 26mm (see item No. 02188xx and 02196xx). The magnification can be varied from 15x to 50x (focal length binoculars : focal length eyepiece = magnification). The eyepieces are held in the binoculars by a precise brass compression ring clamp and guarantee a tilt free position.
5. Customizable optics - Use of color and nebula filters for astronomical observations
Increase the contrast and visibility of objects and details by screwing the corresponding filters directly into the thread of the eyepiece sleeves. The use of color and nebula filters must of course always be done in pairs. Suitable are all Explore Scientific screw filters with 1.25inch / 31.7mm diameter.
6. Enhanced object visibility - Comfortable 45 degree view and helical single focus
The 45-degree viewing angle allows a relaxed observation position even when the binoculars are tilted strongly. Also the individual interpupillary distance can be adjusted in a range from 54 to 76mm. With the fine helical individual focusing, precise focusing is achieved effortlessly. Extendable dew caps The integrated dew caps can be removed in high humidity and cold conditions. This avoids fogging of the outer objective lenses and effectively shields additional control light coming in from the side.
7. Integrated carrying handle
A metal carrying handle located at the center of gravity facilitates transport and ensures a secure hold during tripod assembly.
8. Precise focusing and convenience - Suitable tripods and tripod connection
When using these large binoculars, a sturdy photo tripod with an appropriate load capacity is highly recommended. The connection is made via two 1/4 inch or one 3/8 inch threaded holes (standard photo tripod thread) in the tripod adapter of the binoculars. The ideal solution is to use the optional available EXPLORE SCIENTIFIC U-Mount with field tripod (item No. 01-14300). This is specially designed for the large binoculars of the BT series and carries these devices absolutely safely. The excellent mechanism with adjustable friction in both axes allows easy moving and tracking. The binocular position is kept stable depending on the adjusted friction intensity. Vibrations are reduced to a minimum by the massive construction of the U-Mount and the large stainless steel tripod. Even at high magnification there are no vibrations and the finest details can be observed.
What's in the box?
- Explore Scientific BT-70 SF Large Binoculars ×1
- Premium waterproof Explore Scientific 62° 20mm LER eyepieces ×2
- Carrying handle ×1
- Eyepiece holder 1.25 inch / 31.7mm ×1
Recommended Accessories
- Astrozap 3" Dew Heater Strap
- Explore Scientific U-mount with field tripod
- Explore Scientific Eyepieces 62° & 82° Series
SPECS
Optical Parameters
- Optical design: Achromatic refractor Porro
- Mirror/Lens diameter: 70mm
- Focal length: 400mm
- Focal ratio: 5.7
- Apparent field of fiew: 62 degrees
- Field of view: 3.1 degrees
- Type of remuneration: Enhanced Multilayer Deposition (EMD)
- Exit pupil min.: 3.5mm
- Exit pupil distance: 15mm
Hardware Parameters
- Waterproof: Yes
- Water resistance protection level: IPX6
- Total length: 14.57" / 370mm
- Total width: 8.39" / 213mm
- Total height: 4.80" / 122mm
- Total net weight: 7,496lbs / 3400g
- Housing material: Magnesium
CA Residents: Prop 65 WARNING(S)
Download Manual for Explore Scientific BT-70 SF Large Binoculars (English)
