I have Celestron 15x70 and 25x70 binoculars. After comparing the two I came to the following conclusion: Both binoculars are excellent and have a sharp, clear image. The optics are really stunning in this price range! I had to return the 25x70 set due to internal dust when checking it out, but Revain sent me a new pair with no problem. Both binoculars use the same body. The 25x70 is slightly shorter (1/4 inch) due to the closer distance between the eyepiece (eye) and lens. The 25x70 eyepieces also have larger eyepiece lenses due to the higher magnification. Both binoculars require a tripod (especially 25x70 binoculars, which are more prone to camera shake). BUY a 70" or larger tripod! I have a 60" tripod and I'm 5ft 5" tall, but when something is about 90 degrees above your head, tripod height "60" doesn't help. I have an example posted Magnification and field of view difference between 15x70 (1st photo) and 25x70 (2nd photo) As you can see 25x70 gives more magnification but the trade-off is the FOV which is larger at 15x70 The actual views through the binoculars are clearer as the phone doesn't transmit this properly OBJECT VIEWING: When viewing celestial objects the MOON completely fills the frame at 25x70 JUPITER's 4 Galilean moons (yes it seems) look great in both binoculars out. Another thing I enjoy watching is PLANES. With a tripod I was able to see and track the JETS at 35,000ft. THIS IS A MIRACLE! 25x70 works well here as I can read the writing on the planes. MY RECOMMENDATION : I would 25x dial 70 The 25x70 is $3 more expensive, so why not up the magnification. The wider field of view of 15x70 binoculars allows for better handheld work, but you still need a tripod for skygazing no matter which binoculars you buy. ALSO: Both the 25x70 and 15x70 come with a tripod adapter. but I would choose METAL as these binoculars are heavy. The Barska adapter is metal with a large rubber clamp screw and is only $8 (see photo). I would also buy Field Optics Research Binocular Glasses ($14) to protect my eyes from peripheral light during the day (see photo).
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