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25x magnification porro prism binocular
Large 70 mm objective lens offers maximum image brightness in low-light and long-range conditions
Ultra sharp focus across the field of view.Linear Field of View (@1000 yds) / @1000 m): 141 feet (47 m) Exit Pupil: 0.11 inches. Eye Relief: 0.51 inches
Multi-Coated optics for sharp, clear views
This adapter allows you to mount your binocular (porro or roof) to a tripod for added stability and convenience
Style:SkyMaster 25×70 Binocular
Configuration:w/ Binocular Tripod Adapter
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3,068 customer reviews
4.1 out of 5 stars
|Best Sellers Rank||
#2,436 in Camera & Photo (See Top 100 in Camera & Photo)
|Date first listed on Amazon||June 26, 2019|
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Both binoculars excel and have a clear crisp view. The optics are truly amazing at this price point! I did have to send back a set of the 25×70’s due to interior dust being seen as I looked through them, but Amazon sent me a new pair no problem. Both binoculars use the same body. The 25×70’s are a touch shorter (1/4 inch) in length due to shortening of the Ocular (eye) to the Objective lens distance. The 25×70’s also have a larger Ocular lens due to the increased magnification. Both binoculars need a tripod (especially the 25×70’s which are more effected by shaking). GET A 70″ or greater TRIPOD! I have a 60″ tripod and I’m a short5’5″ but when something is near 90 degrees over your head the “60 height of the tripod won’t cut it.
I posted an example of the magnification and the Field of View difference between the 15×70 (1st Pic) and the 25×70 (2nd Pic). As you can see the 25×70 gives you a greater MAGNIFICATION but the trade off is the FIELD OF VIEW which is greater with the 15×70’s. The actual views through the bino’s are sharper as the cellphone doesn’t do it justice.
LOOKING AT OBJECTS: In looking a celestial objects the MOON totally fills the frame with the 25×70’s. The 4 Galilean moons of JUPITER (yes you can seem) look great in both set of binos. Another thing I love to look at are AIRPLANES. With the use of a tripod I was able to see and follow JETS at 35,000 ft. IT IS A MARVEL! The 25×70’s work well here as I can read the writing on the planes.
MY RECOMMENDATION: I would choose the 25×70’s. The 25×70’s are $3 more so why not go for more magnification. The wider field of view on the 15×70’s does allow a better “hand-held” experience but you are still going to need a tripod for celestial viewing no matter which bino’s you buy.
ALSO: Both the 25×70 and the 15×70 come with a tripod adapter but I’d upgrade to a METAL one as these binos are heavy. The Barska adapter is metal with a larger rubber tightening screw and is only $8 (see photo). I’d also get some Field Optics Research Binocular EyeShields ($14) to help keep out peripheral light in daytime viewing (see photo).
This is a great product overall. You will see spectacular views of the moon and larger deep sky objects like the Andromeda galaxy and the Orion nebula. These are a better entry to the world of astronomy than a telescope due to their portability and ease of use.
First, these binoculars are meant for astronomy.
These are heavy, and due to the 15x magnification need to be mounted on a monopod or tripod. I can’t overemphasize that.
The focus is slow and stiff.
If sports, hunting, or birding is your primary use, look elsewhere at smaller, lighter binoculars.
If astronomy is you primary use, you may be able to live with these for occasional terrestrial viewing.
These binoculars are not a telescope. Sounds kind of simplistic,I know, but if you are seeking to see the bands on Jupiter or detail in Satrun’s rings, these won’t do that for you. But you will be able to see Jupiter’s moons and the rings on Saturn – enough that you can tell what you’re looking at.
The “very good”:
Optically these binoculars are very good. The field is bright and flat and they focus sharp to the edges. False color (Chromatic aberration) is visible as red/blue fringing around bright objects. It is not at all severe, but it is there and visible on bright celestial and high contrast terrestrial objects. It is worse at the edges of the field than in the center. Views of large deep sky objects like the Orion nebula are really beautiful. The contrast is very good.
The “just ok”
Mechanically the focus is a little hard to adjust. There is some play in the mechanism that has to be accounted for, but it is very easy to focus out, then back in to the point of perfect focus. Once focused they stay that way for a long time.
The “totally unacceptable”
The plastic tripod adapter is totally and completely useless. The binoculars just rotate back and forth and it takes forever for them to settle down after you move them. That’s a shame because at 15x magnification these need to be mounted on a sturdy tripod. Even in light wind the tripod adapter just causes the binoculars to wiggle back and forth.
I have ordered the Celestron 93524 Binocular Tripod Adapter and will see if it is good enough. Even with that adapter, the center of graviry of the binoculars won’t be at the tripod’s pivot point, so you have to keep the friction on and that makes it harder to move them. A better balanced tripod mounting scheme would be killer.
An incredible value. Good optics, decent mechanics, and an unusable tripod adapter.
Throw a decent tripod adapter that is sturdy and fit for the purpose. Extra credit for centering the CG at the the tripod attachment point. Lose the useless strap, and raise the price
December 21, 2015
Relatively easy to hold steady with proper technique.
Easily make out craters and mountain ranges on the moon.
Fits inside a backpack.
Neck strap secures the eyepiece cap.
All moving parts work smoothly, neither too tight nor too loose.
Easy to adjust collimation. Simply remove one of the grips using a flathead screwdriver or other pry tool and adjust the prism tilt screws (the side screw controls vertical and the top screw contols horizontal adjustment) with a 3/32 or smaller flathead screwdriver until the images merge. Even if they arrive collimated for you, it’s best to have a small screwdriver on hand as they can get knocked out of collimation from general use over time.
If you get a headache from looking through the binoculars, it means the collimation is still out, but your eyes are straining to merge the images. If this occurs, relax the eyes and focus on nothing in particular through the binoculars. The split image will become apparent.
Note: when collimating, make sure that the view in each ocular is perfectly round. If it takes on a gibbous shape when viewed in daylight (don’t look at the sun) then the prisms are out of alignment and you need to start over.
Arrived out of collimation.
The edges of the moon appear to be a rainbow of colors, likely due to low quality coatings.
If you’re a beginner astronomer and willing to fiddle around with the collimation (it only takes a few minutes), these binoculars are a good buy. I’m sure that the professionals will find something to complain about, but for the average viewer it won’t be noticeable.