SKU: 78005977799

Explore Scientific BT-70 SF Large Binoculars with 62 Degree LER Eyepieces

Sale price$720.00 Regular price$800.00
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Ships within 48 hours · Estimated delivery Jul 22 - Jul 27

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Description

Explore Scientific BT-70 SF Large Binoculars with 62 Degree LER EyepiecesExperience Stellar Clarity Want bright and clear images? Get BT 70 SF Binoculars that will help you observe celestial and terrestrial objects without worrying about fogging or weather damage. Features Powerful Large Binoculars: 70 mm objective diameter and 400 mm focal length for exceptional light gathering and image clarity. Dual Purpose Viewing: Ideal for observing celestial objects at night and distant terrestrial targets during the day. Durability

Experience Stellar Clarity

 

Want bright and clear images? Get BT-70 SF Binoculars that will help you observe celestial and terrestrial objects without worrying about fogging or weather damage.

 

Features

  • Powerful Large Binoculars: 70 mm objective diameter and 400 mm focal length for exceptional light gathering and image clarity.
  • Dual-Purpose Viewing: Ideal for observing celestial objects at night and distant terrestrial targets during the day.
  • Durability and Weather Resistance: IPX6 waterproof and nitrogen-filled design prevent fogging and withstand harsh weather conditions.
  • Comfortable Viewing Angle: 45-degree angle ensures a fatigue-free experience, even during extended observations.
  • High-Quality Eyepieces: Includes two premium waterproof 62-degree 20mm LER eyepieces for a 20x magnification with a wide 3.1-degree field of view.
  • Interchangeable Eyepieces: Compatible with all 1.25 inch / 31.7mm diameter eyepieces, allowing customization of magnification and field of view.
  • Enhanced Image Quality: Professional Enhanced Multilayer Deposition (EMD) lens coatings and achromatic refractor Porro optics provide bright, sharp, and color-accurate images.
  • Sturdy Construction: Lightweight magnesium housing with integrated carrying handle for easy transport and secure tripod assembly.
  • Extendable Dew Caps: Minimize condensation on lenses and protect against stray light, ensuring clear images in various conditions.
  • Versatile Tripod Compatibility: Fits standard 1/4 inch and 3/8 inch photo threads for stable mounting, with an optional U-Mount for enhanced stability.

The Explore Scientific BT-70 SF Large Binoculars are for you if…

  • You are an Astronomy Enthusiast: Seeking unparalleled clarity and detail in your stargazing sessions, with the ability to observe the moon, planets, and deep-sky objects.
  • You are a Nature and Wildlife Observer: Looking for bright, brilliant images of distant wildlife and landscapes, even in low light conditions.
  • You are a Maritime or Aviation Enthusiast: Wanting to spot ships, aircraft, and distant objects with precision and reliability.
  • You are an Outdoor Adventurer: Needing robust, weather-resistant equipment that can withstand tough outdoor conditions while providing clear and detailed observations.
  • You Value Versatility and Customization: Appreciating the ability to interchange eyepieces and use various filters for personalized viewing experiences.

Experience the night sky like never before with the Explore Scientific BT-70 SF Large Binoculars. With their 70 mm objective diameter and 400 mm focal length, these binoculars provide exceptional light-gathering capability, allowing you to observe celestial objects in stunning detail. Whether you're gazing at the moon's craters or distant star clusters, these binoculars deliver bright, sharp images, making every stargazing session unforgettable.

For nature and wildlife enthusiasts, the BT-70 SF offers unparalleled daytime performance. Observe distant landscapes and wildlife with precision, thanks to the high-quality achromatic refractor Porro optics and professional Enhanced Multilayer Deposition (EMD) lens coatings. The 20x magnification and wide 3.1-degree field of view ensure that you won't miss any details, whether you're tracking a bird in flight or spotting wildlife from afar.

Durability and weather resistance are key features of the BT-70 SF, making them ideal for outdoor adventures. The IPX6 waterproof and nitrogen-filled design prevents internal fogging and withstands harsh weather conditions, ensuring reliable performance in any environment. The lightweight magnesium housing and integrated carrying handle make these binoculars easy to transport and handle, whether you're hiking through rugged terrain or setting up on a tripod.

Comfort and ease of use are also top priorities with the BT-70 SF. The 45-degree viewing angle allows for relaxed, extended viewing sessions without straining your neck or eyes. The long eye relief eyepieces (15mm) and soft silicone eyecups provide a comfortable viewing experience, even for eyeglass wearers. With the fine helical individual focusing mechanism, you can achieve precise focus effortlessly, ensuring the sharpest images every time.

Customization and versatility are standout features of the BT-70 SF. The interchangeable eyepieces with a 1.25 inch / 31.7mm plug-in diameter allow you to adjust magnification and field of view to suit your needs. Choose from a wide range of eyepieces, with focal lengths from 8 to 26mm, and use various color and nebula filters for personalized viewing experiences. Compatible with a wide range of Explore Scientific eyepieces, including the 62 and 82 degree series, you can achieve magnifications from 15x to 50x. The precise brass compression ring clamp ensures a stable, tilt-free position for the eyepieces, providing reliable performance during every observation.

Investing in the Explore Scientific BT-70 SF Large Binoculars means unlocking a world of clarity and detail, whether you're an avid stargazer, a passionate wildlife observer, or an adventurous explorer. These binoculars combine advanced optical technology, robust construction, and versatile features to deliver an unparalleled viewing experience. Don't settle for less—elevate your observations with the BT-70 SF and see the world in a whole new light.


Elevate Your Observation Experience

To truly maximize the potential of your Explore Scientific BT-70 SF Large Binoculars, pairing them with the Explore Scientific U-mount with tripod for large binoculars is a must. This robust mount ensures that your binoculars remain stable, providing a vibration-free viewing experience even at the highest magnifications. The U-mount’s infinitely variable friction adjustment allows for smooth and precise movements in both azimuth and altitude axes, ensuring you can effortlessly track celestial objects or terrestrial targets.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 78005977799

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4.2 ★★★★★
Based on 14 reviews
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Robin J
Chelsea, US
★★★★★ 5
Terrific product
Color: A1-Red
I adopted a 2 year old cat - she’s not much for a lot of the toys I have purchased for her, until this one! At first she seemed very cautious with it - but still followed it around - once I slowed it down (a few different options) she loves to play with it! Great purchase very pleased with it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 6, 2026
S
Verified Purchase
Shayla Shepherd
Alexandria, US
★★★★★ 5
Fun & Fast moving toy for my cats!
Color: A1-Red
This is such a fun little toy to keep my cats entertained. They were definitely weary about it for the first few days, but started to get used to it and play with it after a bit. I wish there was an even slower option because the slow option is still pretty fast, but at least it gets them up and moving. They will even play with the tail part when it's not turned on. Like others have said, it does collect hair pretty easily, but it's very easy to clean off. I don't have any dogs, but I could see smaller dogs loving this as well!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 6, 2026
J
Verified Purchase
Jacqueline M. Miller
Lake Worth, US
★★★★★ 2
That it’s usable for more than one day
Color: A3-Pink, Color: A3-Pink
The toy itself is great and my puppy enjoyed it. My problem is that it didn’t come with a charging cord and none of mine fit. It never changed colors. Maybe if I had a charger cord it would be worth it, but right now it’s useless!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
T
Verified Purchase
Tinkerbell
Carnegie, US
★★★★★ 3
Fun for Fido but flimsy
Color: A2-Blue
My 15 yearold mini Schnauzer, Sam, played with this for less than 1 hour and tore the rubber sleeve off it. I will say the toy itself is a genius idea. Sam was absolutely ensconced. I wish it were made sturdier.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 24, 2026
S
Verified Purchase
sheila b.
Lowell, US
★★★★★ 4
It does exactly what they say it does! Worth the money
Color: A1-Red
It arrived quickly. It’s a fun toy! It’s the right size for cats. Definitely worth the money. It is exactly as described. So far, the quality seems very good and it seems durable. The instructions are on the side of the box, which makes learning how to operate it easy. I love it that it’s red, because my kitty seems to be attracted to red. My kitty is very interested in it, yet isn’t quite sure what to think of it. I love that it changes directions on its own so that it doesn’t get stuck or lost under furniture, which is typical for a ball that cats play with. It seems to only go two, three or four feet in one direction and then it changes directions, which is both good and bad. I just wish it would go farther in one direction before changing directions so that my kitty could chase it farther, as we have plenty of space in our house for her to run. But that certainly could be a plus for other cats, enjoying not knowing where the ball is going to go next and really keep them on their toes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 20, 2026

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