Explore Scientific BT-120 SF Large Binoculars with 62 Degree LER Eyepieces

$2,349.99 $2,899.99 -19% OFF

Explore Scientific BT-120 SF Large Binoculars with 62 Degree LER Eyepieces

$2,349.99 $2,899.99 -19% OFF
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Explore Scientific BT-100 SF Large Binoculars with 62 Degree LER Eyepieces

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-120 binoculars produce a 33x magnification. Thus these wide angle eyepieces offer a very good overview (field of view 1.8 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 25x to 75x (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.

Standard Features

  • Powerful large binoculars with a 120 mm objective diameter and 660 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

Specifications

Item Number

01-14230

Optical design

Achromatic refractor Porro

Mirror / lens diameter

120 mm

Focal length

660 mm

Focal ratio

5.5

Apparent Facial field

62 degrees

Type of remuneration

Enhanced Multilayer Desposition(EMD)

Exit pupil min.

3.6 mm

Field of view

1.8 degrees

Waterproof

Yes

Water resistance protection level

IPX6

Exit pupil distance

15 mm

Total length

654 mm

Total width

290 mm

Total height

156 mm

Total net weight

8300 g

Housing material

Magnesium

Shipping Information

Orders typically get shipped out within 1-2 business days and get delivered within 3-5 business days after they're shipped.

You will receive an order confirmation email and a tracking number once your order has shipped.

If for some reason you order an item that is out of stock, our support team will reach out to either give you more information on when your item will arrive or give you a full refund.

Please check out our shipping policy for more information.

Warranty

Explore Scientific offers free collimation service for the Giant Binoculars for the lifetime of the product. The customer is responsible for shipping both ways. Explore Scientific Giant Binoculars come with a 1-year warranty when registered within 60 days of purchase.

The Explore Alliance membership program offers Extended Care for all Explore Scientific products with a paid membership. For more information on the Explore Alliance Click Here 

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Product Reviews From Verified Purchasers

"

This is my second telescope after a much smaller triplet from a well-known Taiwanese manufacturer. I use this scope almost exclusively for imaging, but it does a great job for visual astronomy as well. I have had great guiding success using an EQ-6R mount, and off-axis guider. I also use a focus motor with the stock focuser which performs very well holding a full imaging train.

The optional carrying case is also really nice, and a pretty cost-effective option when compared to hard cases.

"
Tony L
"

If you're still thinking about it, just buy it. It takes text book images with perfect round stars. Just as good as more expensive brands costing thousands more. Best telescope I have ever owned. It sits in my observatory year round and works flawlessly. I do have it air conditioned in the summer when it gets really hot. I replaced the focuser with a 3". My only complaint is it has a really crummy lens cap, I dropped it and it has never fit right. The 3" reducer/flattener is a must have. Overall I would buy again. Fantastic customer support!

"
Larry G
"

Amazing telescope! Highly recommend if you want to do deep sky (galaxy and nebula astrophotography). Images are amazing!

"
Jeff S
"

The optics are great and clear despite initial dust I had in the OTA (ES took care of that - thanks guys!!). I find the optics with the modern coatings better than what I observe with my TAK-102FS (using a ZWO 1600mm-Pro and narrowband filters). Visually the Tak is a tack nicer but that might also be attributed to the superior feather touch focuser I have in there. The Hexagon Focuser is nice but has a little bit of backlash - you only really notice that when working with cameras and it still is really nice to work with.

Overall 5 stars for the optics - I just bought 2 2" focal extender that should pair well with this scope. Thanks for producing great optics in this price range!!!

"
Jonas C
"

I am a past RC owner and the larger OTAs were becoming too heavy to safely handle. I decided it was time to move to a lighter weight optic and this refractor is in the sweet spot between the lower end telescopes and the $6K and up variety. Visually I see no color fringing at all and while it's smaller than my larger RC, exposure times with my QSI683 are not much longer than I had previously.

Plus I have the added advantage of the wider field of view. My first image was M27 (of course) and when I compared the image with what I had previously made with a 10" RC and ST-8XME, the detail in M27 was very comparable (indicating seeing was perhaps more important as aperture).

I can recommend this OTA for the serious astrophotographer as well as the visual user.

"
John K

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