The Celestron SkyMaster 25x70 binoculars are the ideal choice if you are looking for the largest binoculars. The high quality objective gives a sharp image across the entire field of view. Its prisms are the high-quality BAK4 (rather than the lower-quality BK7 used in similarly priced competing models) used in more expensive binoculars, and are sufficiently large to eliminate vignetting in the field of view. The binoculars have a multi-layer anti-reflection system, and the objective lens has several layers of anti-reflection coating (green) for even greater light transmission.
The binoculars' 13 mm pupil length is excellent for those who wear glasses. Its relatively light weight and magnification allow you to hold the binoculars in your hand without shaking. For astronomical use, a metal L-adapter is highly recommended for a shake-free view when mounted on a sturdy photo stand.
