BT-82 SF Large Binoculars with 62 Degree LER Eyepieces Explore Scientific
BT-82 SF Large Binoculars with 62 Degree LER Eyepieces Explore Scientific
BT-82 SF Large Binoculars with 62 Degree LER Eyepieces Explore Scientific
BT-82 SF Large Binoculars with 62 Degree LER Eyepieces Explore Scientific
BT-82 SF Large Binoculars with 62 Degree LER Eyepieces Explore Scientific
BT-82 SF Large Binoculars with 62 Degree LER Eyepieces Explore Scientific

BT-82 SF Large Binoculars with 62 Degree LER Eyepieces

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    Explore Scientific
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    Estimated Arrival: Between Dec 11 and Dec 13. *ETA to USA Only

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    The Ultimate Obsession for Nature Lovers


    Giant binocular for observing the starry sky, nature and landscape. 
    Observe the beauty of the starry sky at night and 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.  

    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. 

    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 degree 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 we have decided to deliver these giant binoculars with a pair of quality eyepieces of the 62 degree LER series. With an apparent field of view of 62 degrees and a focal length of 20mm, the BT-82 binoculars produce a 24x magnification. Thus these wide-angle eyepieces offer a very good overview (field of view 2.6 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. 

    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 and 82 degree series with focal lengths from 8 to 26mm (see item No. 02188xx and 02196xx). The magnification can be varied from 18x to 60x (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.  

    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 (see item No. 03102xx)  

    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. 

    Integrated carrying handle 
    A metal carrying handle located at the center of gravity facilitates transport and ensures a secure hold during tripod assembly. 

    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.


  • Powerful large binoculars with a 82 mm objective diameter and 480 mm focal length
  • Observe the moon, the planets and bright deep sky objects in the night sky as well as terrestrial targets
  • Extremely robust binoculars, sealed and filled with nitrogen
  • Convenient 45-degree view and individual focusing
  • Carrying handle makes it easier to transport the binocular and ensures a secure hold during tripod assembly
  • Includes two premium waterproof Explore Scientific 62 degree 20mm LER eyepieces
  • Eyepiece holder 1.25 inch / 31.7mm, interchangeable eyepieces
  • Extendable dew caps minimize condensation on the lenses
  • Tripod connection: 2 x 1/4 inch and 1 x 3/8 inch photo thread

  • Specs

  • Item Number 01-14210
    Optical design Achromatic refractor Porro
    Mirror / lens diameter 82 mm
    Focal length 470 mm
    Focal ratio 5.7
    Apparent Facial field 62 degrees
    Type of remuneration Enhanced Multilayer Desposition (EMD)
    Exit pupil min. 3.5 mm
    Field of view 2.6 degrees
    Waterproof Yes
    Water resistance protection level IPX6
    Exit pupil distance 15 mm
    Total length 445 mm
    Total width 226 mm
    Total height 122 mm
    Total net weight 4300 g
    Housing material Magnesium


    Explore Scientific offers free collimation service for the Giant Binoculars for the lifetime of the product. The customer is responsible for shipping both ways.

  • Experience the great outdoors like never before with the BT-82 SF Large Binoculars with 62 Degree LER Eyepieces. With its superior optics and advanced features, you'll be able to see the world in stunning detail. Whether you're a bird watcher, stargazer, or nature enthusiast, these binoculars will take your viewing experience to the next level.

    The BT-82 SF binoculars feature 62 degree LER eyepieces, which provides a wide field of view and long eye relief for comfortable viewing. The binoculars are also equipped with a BaK-4 prism and a fully multi-coated optical system, which enhances light transmission and produces bright, clear images. You'll be able to see every detail, even in low light conditions.

    Designed for convenience and durability, the BT-82 SF binoculars feature a lightweight magnesium alloy body and rubber armoring for a comfortable grip. The binoculars are also waterproof, fog proof, and nitrogen purged to prevent internal fogging.

    So why wait? Order your BT-82 SF Large Binoculars with 62 Degree LER Eyepieces today and start experiencing the great outdoors like never before!

    Looking for high-quality binoculars that will enhance your outdoor experience? Look no further than the BT-82 SF Large Binoculars! These binoculars are designed to provide you with the ultimate viewing experience, whether you're birdwatching, stargazing, or exploring nature. With a large objective lens of 82mm and 62 degree LER eyepieces, these binoculars provide clear and wide-angle views that will blow you away!

    Engineered for exceptional optical performance, these binoculars are perfect for observing natural phenomena like distant stars, planets, and deep-sky objects. They come with a built-in tripod adapter to attach to your tripod for comfortable and steady viewing. Whether you're hiking deep into the forest or relaxing in your backyard, these binoculars are perfect for the most avid of nature lovers!

    The BT-82 SF Large Binoculars are ruggedly constructed with a waterproof and fog proof design, making them suitable for use in all weather conditions. The ergonomic design provides comfortable and slip-free grip, even in wet conditions. With superior light transmission capabilities, these binoculars deliver bright and clear images, even in low-light conditions. These binoculars come with a carrying case for easy transportation and safe storage.


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