Observe the beauty of the starry sky at night and distant objects in nature during the day with the BT-70 SF Giant Binoculars from Explore Scientific. Globular star clusters, glowing gas nebulae, the moon with its craters, and even planets can be observed wonderfully on a clear night. With the all-round binoculars of the Explore Scientific BT series, you can get up very close. Thanks to large, light-gathering lenses and professional coatings on all lens surfaces, these binoculars produce bright and brilliant images, even at night and at twilight. The comfortable 45° viewing angle allows fatigue-free use even when the binoculars are tilted.

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 20mm eyepieces of the 62° LER (long eye relief) series are included. With an apparent field of view of 62° and a focal length of 20mm, the BT-70 binoculars produce 20x magnification. These wide angle eyepieces offer a very good overview (field of view 3.1°) at moderate magnification. The large 15mm eye relief and soft silicone eyecups, which can be turned inside out, guarantee a comfortable and relaxed view. Due to the waterproof design and the argon filling, these eyepieces are durable and easy to clean.

Observe Moon, Planets, Deep Sky Objects    70mm Objective, 400mm Focal Length    62° 20mm Eyepieces, 20x Magnification

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" can be used with the binoculars of the BT series. The eyepieces are held in the binoculars by a precise brass compression ring clamp and guarantee tilt free positioning.

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.

The 45° viewing angle allows a relaxed observation position even when the binoculars are tilted. Also the individual interpupillary distance can be adjusted in a range of 54 to 76mm. With fine helical individual focusing, precise focusing is achieved effortlessly.

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.

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

When using these large binoculars, a sturdy photo tripod with an appropriate load capacity is essential. The connection is made via two 1/4" or one 3/8" 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 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.

Related Questions and Answers

Q: 1. What is needed to mount this telescope on a RRS series 4 tripod?

A: The Explore Scientific FirstLight 254mm f/5 Dobsonian Telescope is about 11 inches in diameter, 65 inches tall and weighs about 50 pounds. It cannot be used on a tripod.

Q: 2. Does it have a US warranty

A: Yes, the Zeiss10x42 Victory SF T* Binoculars does have a US warranty.

Q: 3. Is there a better binocular case available for the Zeiss 3x42 Victory SF T?

A: Yes, the Swarovski Field Bag Large Pro wioll work very well: https://bhpho.to/2Olnhxm

Q: 4. Can i know Explore Scientific 8x56 G600 ED Binoculars weight

A: The Explore Scientific 8x56 G600 ED Binoculars weigh 2 pounds.

Q: 5. If no front threads, what holds the dust caps in place? I want to put solar filters on front of these binoculars.

A: The caps included with the Explore Scientific BT-70 SF Giant Binoculars are clip in but they are a custom size and thus filters cannot be used on the front unless they are an adjustable size such as this Daystar solar filter: https://bhpho.to/3qFnkJe

Q: 6. HOW THIS EYEPIECE'S QUALITY COMPAIR TO THE 24 MM PANOPTIC EYEPIECE ?

A: The Panoptic is slightly better... it's nowhere near 2x better, which is usually the price difference. I tested out quite a few televue vs ES eyepieces in 68, 82, and 100 degrees and have always found the ES to be the best bang for the buck by a pretty noticeable margin.

Q: 7. What is the thread size on the camera side? Is it M42x0.75 or M48x0.75? Does it include an M48 adapter?

A: On the camera side the threads are M42 for standard T-mounts.

Q: 8. Will this work with an Evostar 72 APO refractor?

A: Yes, the Explore Scientific Field Flattener for f/5 to f/7 Refractors is compatible with the Sky-Watcher Evostar ED APO 72mm f/5.8 Refractor.

Q: 9. I HAVE A BAIR OF ZEISS 10X42 T-FL BINOCULARS. THE EYE PECE THAT IS USED TO ADJUST USE WITH OR WITHOUT GLASSES HAS FALLEN OUT AND IS LOST. HOW CAN I REPLACE IT ?

A: Any service or parts will have to come from Zeiss. ZEISSTel: 800-543-1033 Website http://www.zeiss.com/ Email customerassistance.vision.na@zeiss.com

Q: 10. Can you explain the T* in the model name, Zeiss 8x42 Victory SF T*? I am not seeing it on the Zeiss website.

A: T* is the name give to the multi-layer coating which allows good viewing in low light. And they are excellent in low light.