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I would strongly suggest getting then Ultra 15x70's they really have excellent optics and build qualities. They are heavy. They have the highest specs available. Pin point on axis and field curvature occours about 80 % out there is mild pincushioning. There are no other obvious aberrations. The contrast is excellent. They are equal in brightness to my Japanese 80mm binos. The Skymasters are good for the price. They are however only 'Multi Coated' lens only - they do display some internal reflections. Light transmission is not as good as the Ultras.
I had 3x skymaster 15x70's - all where mildy mis-collimated - you have to pick a good one. Celestron's Q.A. could be improved.
The 15x70 Ultra's are highly recommended.
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