Celestron SkyMaster 20x80 Binoculars | Telescope.com: Celestron

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Celestron SkyMaster 20x80 Binoculars

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Celestron 20x80 binoculars with four-element objective lenses for ultra sharp focus across the field of view
Multi-coated optics throughout for sharp, clear views
Integrated tripod adapter rod provides ultra-stable tripod mounting
Long eye relief ideal for eyeglass wearers
Deluxe padded carrying case included for travel and safe storage of the binoculars

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Item # 09117

Mfg Model # 71018

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Celestron's SkyMaster Series of large aperture binoculars are a phenomenal value for high performance binoculars ideal for astronomical viewing or for terrestrial (land) use — especially over long distances. Each SkyMaster model features high quality BAK-4 prisms and multi-coated optics for enhanced contrast. Celestron has designed and engineered the larger SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions.

For maximum stability and secure optical alignment, this 80mm SkyMaster model features enhanced structural reinforcement to the main binocular body. As an additional convenience, the 80mm also includes an integral super rigid photo tripod adapter. The SkyMaster Series binoculars are built to provide years of magnificent views of the world around you and the heavens above.

Warranty

This product is serviced and supported by its manufacturer according to the terms and conditions included in the packaged product. Orion's limited warranty does not apply. Please contact the manufacturer directly for technical support.

Warning

Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

Specs

Best for viewing

Brighter deep sky
Magnification

Magnification

A measure of the enlargement of an object seen through an optical instrument. More specifically, it is a measure of the angle subtended by an image viewed with optical aid divided by the angle subtended by the same object without optical aid. Magnification is determined by dividing the focal length of the telescope (or binocular) by that of the eyepiece. Hence a telescope with a 1200mm focal length and an eyepiece of 40mm yields a magnification of 30x. The human eye is considered 1x magnification.

20x
Optical diameter

Optical diameter

The optical diameter (also known as aperture), is the size of the telescope's main light collecting lens or mirror, measured in millimeters or inches. As the diameter increases, more light is collected and the resolution increases.

80mm
Field of view - angular

Field of view - angular

The field of view expressed as part of a 360-degree circle. Holding your pinky finger out at arms length is approximately 1-deg wide. To convert this to the linear measurement of "feet at a thousand yards", multiply by 52.5. For example, at 1000 yards distance, a 7-deg binocular will see a width of 367.5 feet (7 x 52.5)

3.2°
Field of view - linear

167.6 ft./1000 yd
Apparent field of view

Apparent field of view

The edge-to-edge angular diameter of the light emerging from the eyepiece as seen by the eye. It is an inherent specification for a given eyepiece type or design. The apparent field of view of an eyepiece is directly related to the true field of view seen through the telescope; for a given focal length eyepiece, the greater the eyepiece's apparent field of view, the greater area of sky will be seen.

64.0°
Eye relief

Eye relief

The distance, measured in millimeters, between the observer's eye and the eyepiece lens in which the entire field of view remains visible. Eye relief varies with the optical design but generally increases with decreasing magnification. Long eye relief is advantageous for observers who wear glasses, as they don't have to put their eye directly on the eyepiece to see the entire field of view, nor do they have to remove their eyewear.

17.0mm
Exit pupil

Exit pupil

The diameter of the circle of light exiting the telescope eyepiece. It appears as a distinct disk when the telescope is pointed at a bright source like the Moon. Also known as the Ramsden disk, the exit pupil varies with both aperture and magnification.

4.0mm
Near focus

Near focus

The minimal distance at which a binocular and/or spotting scopes can attain focus. Near focus is an important quality for bird watchers and wildlife devotees who want to get as close as possible to their quarry.

80 ft.
Coatings

Coatings

Lenses are coated with an antireflective material to ensure that as little light as possible is reflected away, so more gets to your eye. Good lenses are at least "fully coated," with a single layer of magnesium fluoride applied to each air-to-glass lens surface. Multiple layers of coatings are even more effective; the term "multi-coated" means one or more lens surfaces have multiple coatings. "Fully multi-coated" is even better, meaning that all lens surfaces are multiple-layer coated. Mirror star diagonals are coated with a reflective material similar to telescope mirrors in order to reflect the light into the eyepiece. Standard aluminum coatings reflect between 88%-92%, and enhanced aluminum reflects 97%. Dielectric coatings use a different process to deposit a coating that reflects 99% of the light. In addition to the higher reflectivity, Dielectric coatings are much more durable than aluminum coatings, so they last longer and can be cleaned with less risk of damage.

Multi-coated
Prism

Prism

Porro Prisms: A binocular prism system that contains two right-angle prisms in each barrel offset from one another, requiring that the objective lenses be spaced further apart than the eyepieces. Optically, porro prisms often perform better than their roof prism counterparts. Roof Prisms: A compact binocular prism system that allows the objective lenses to line up directly with the eyepieces and hence yields a more portable binocular. Roof prism binoculars lose slightly more light to reflections than porro prism binoculars. High-quality roof prism binoculars compensate for this with special optical coatings.

BAK-4 Porro
Focus style

Center focus
Tripod adaptable

Yes
Diopter adjustment

Yes
Weight

5.9 lbs.
Warranty

Limited lifetime

Shipping Info

Orders received by noon Pacific Time for in-stock items ship the same business day. Orders received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

A per-item shipping charge (in addition to the standard shipping and handling charge) applies to this product due to its size and weight. This charge varies based on the shipping method.

Standard Delivery: $9.95
3 Day Air Delivery: $10.00
2 Day Delivery: $10.00
Next Day Delivery: $13.00

Reviews

Celestron SkyMaster 20x80 Binoculars

Rating??

4 / 5

Open Ratings Snapshot

Rating Breakdown 1 Review

5 stars

0

4 stars

1

3 stars

0

2 stars

0

1 star

0

Optical Quality??

4 / 5

4 / 5

Mechanical Quality??

4 / 5

4 / 5

Ease of Use??

5 / 5

5 / 5

Value??

5 / 5

5 / 5

1 out of 1(100%)reviewers recommend this product.

Share this product

1

1 The Celestron SkyMaster 20x80 binocular features four-element objective lenses for ultra sharp focus across the field of view, and the multi-coated optics provide extremely bright views. Perfect for astronomy and long distance terrestrial viewing.

Rating??

4 / 5

Open Ratings Snapshot

Rating Breakdown 1 Review

5 stars

0

4 stars

1

3 stars

0

2 stars

0

1 star

0

Optical Quality??

4 / 5

4 / 5

Mechanical Quality??

4 / 5

4 / 5

Ease of Use??

5 / 5

5 / 5

Value??

5 / 5

5 / 5

1 out of 1(100%)reviewers recommend this product.

Share this product

Product ReviewsWrite A Review

Rating??

4 / 5

The power to grab and go!

PostedDecember 13, 2011

from??Sequim, WA

Owned this product for:Less than 3 mos

Optical Quality??

4 / 5

4 / 5

Mechanical Quality??

4 / 5

4 / 5

Ease of Use??

5 / 5

5 / 5

Value??

5 / 5

5 / 5

I exchanged the Orion 15x70 binoculars for the Celestron 20x80 binoculars because the Orion's didn't work well for looking at the stars which is what I bought them for. I was a bit concerned the Celestron's would disappoint me too, but thankfully they did not. The moon is magnificent with many surface features evident, Jupiter is easily seen with its 4 major moons, the Pleiades star cluster is stunning, and even the Orion Nebula is visible. Stars are bright pinpoints, but focusing could be a bit easier, as the focus knob could have a bit more range.

These will probably get more use than any of my telescopes, simply because you can grab them and go. I find the best way to view is to lie on my back and look up. This way they are very steady when you hold them and you can easily scan the sky.

Favorite viewing location:??Backyard

Favorite object to observe:??Pleiades star cluster

Pros: portable, sturdy, good optics

Cons: focus range

Yes, I recommend this product!

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+3points

3of 3voted this as helpful.

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Since 1975 Orion Telescopes & Binoculars has been offering telescopes for sale direct to customers, with an unswerving commitment to best quality products, value and unmatched customer care. Our 100% satisfaction guarantee says it all.

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