Celestron SkyMaster 25 X 70 Binoculars | Telescope.com: Celestron

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Celestron SkyMaster 25 X 70 Binoculars

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Celestron 25x power magnification porro prism binocular
Large 70mm objective lenses offers maximum image brightness in low-light and long-range conditions
Ultra sharp focus across the field of view
Protective rubber covering for ultra-firm grip
Multi-coated binocular optics for sharp, clear views

Item # 09172

Mfg Model # 71008

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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.

25x
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.

70mm
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)

2.7°
Field of view - linear

141.0 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.

67.5°
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.

13.0mm
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.

2.8mm
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.

75 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
Interpupillary distance range

Interpupillary distance range

The distance between the two pupils of an observer's eyes. Binoculars can be adjusted to accommodate variations in a person's interpupilary distance.

56mm - 72mm
Focus style

Center focus
Tripod adaptable

Yes
Diopter adjustment

Yes
Weight

3.2 lbs.
Additional included accessories

Carrying case
Other features

Rubber coated
Warranty

Limited lifetime

In the Box

Binoculars
Tripod adapter
Carrying case

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.

Reviews

Celestron SkyMaster 25 X 70 Binoculars

Rating??

4.5 / 5

Open Ratings Snapshot

Rating Breakdown 2 Reviews

5 stars

1

4 stars

1

3 stars

0

2 stars

0

1 star

0

Optical Quality??

4.5 / 5

4.5 / 5

Mechanical Quality??

4 / 5

4 / 5

Ease of Use??

5 / 5

5 / 5

Value??

4.5 / 5

4.5 / 5

2 out of 2(100%)reviewers recommend this product.

Read all 2 reviews

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2

2 The Celestron 25x70 Skymaster binocular combines big aperture with high power, resulting in maximum image brightness in low-light and long-range conditions. Multi-coated lenses offer sharp, clear views of the night sky and distant landscapes.

Rating??

4.5 / 5

Open Ratings Snapshot

Rating Breakdown 2 Reviews

5 stars

1

4 stars

1

3 stars

0

2 stars

0

1 star

0

Optical Quality??

4.5 / 5

4.5 / 5

Mechanical Quality??

4 / 5

4 / 5

Ease of Use??

5 / 5

5 / 5

Value??

4.5 / 5

4.5 / 5

2 out of 2(100%)reviewers recommend this product.

Read all 2 reviews

Share this product

Product reviews

Click on filters to refine your results.

Ratings summary

Rating??

4.5 / 5

Open Ratings Snapshot

Rating Breakdown 2 Reviews

5 stars

1

4 stars

1

3 stars

0

2 stars

0

1 star

0

Optical Quality??

4.5 / 5

4.5 / 5

Mechanical Quality??

4 / 5

4 / 5

Ease of Use??

5 / 5

5 / 5

Value??

4.5 / 5

4.5 / 5

2 out of 2(100%)reviewers recommend this product.

Read all 2 reviews

Share this product

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Product ReviewsWrite A Review

Rating??

4 / 5

Nice Set Of Oculars!!

PostedJanuary 18, 2012

Top 25 contributor
This reviewer is considered a top contributor due to the number and helpfulness (as voted on by readers like you) of the reviews they have submitted.
Top 25 contributor

from??Yuma, Az

Owned this product for:Less than 3 mos

Optical Quality??

4 / 5

4 / 5

Mechanical Quality??

3 / 5

3 / 5

Ease of Use??

5 / 5

5 / 5

Value??

4 / 5

4 / 5

I think these are suprisingly light for how big they are. The Mount adapter is okay, make sure you use these with a good sturdy tripod. Don't try to hold them or you'll get vertigo.. Optics are very good. I use these for a quick fix when I take the dogs out at night. Soft case is nice for storage. The only issue that I have is that I have to spread out the Binoculars all the way out and I still don't think that it is enough.

Favorite viewing location:??Home

Favorite object to observe:??M42

Pros: light weight

Yes, I recommend this product!

Share:

+3points

3of 3voted this as helpful.

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Rating??

5 / 5

best binoculars I've ever purchased

PostedJanuary 13, 2012

from??oklahoma

Optical Quality??

5 / 5

5 / 5

Mechanical Quality??

5 / 5

5 / 5

Ease of Use??

5 / 5

5 / 5

Value??

5 / 5

5 / 5

these are the best binoculars I have ever owned, you can see craters on the moon you , can see orion nebula, and the moons around jupiter, I even the spotted some turkeys almost a mile away, these are great and thank you for shipping them out same day to me, I will definitely be buying from orion again in the future, thank you fred

Favorite viewing location:??backyard or in the mountains

Favorite object to observe:??moon

Yes, I recommend this product!

Share:

+4points

4of 4voted this as helpful.

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