10x50/15x70
Some classic observational books recommend handheld stargazing binoculars with specifications of 7x50 or 10x50. However, with increasing light pollution around cities and the fact that after the age of 30, even in complete darkness, the pupil diameter rarely reaches 7mm, part of the aperture of 7x50 binoculars might be wasted. On the other hand, the 10x50 specification, with its 5mm exit pupil, will not waste the 50mm objective lens aperture. Additionally, compared to 7x50 binoculars, 10x50 binoculars allow you to see more faint stars than 7x50. Therefore, in recent years, the recommended specification for stargazing has largely shifted to 10x50. Please choose specifications based on your actual usage environment and requirements.
The Red Mountain 10×50 / 15×70 binoculars are enhanced versions of the Red Mountain series. The 10×50 model features a classic 65° apparent field of view, and both models are equipped with large, high-precision BaK4 prisms built to MS standards. All lenses are made of optical glass and fully multi-coated with ultra-wideband coatings, resulting in higher light transmission and brighter images.
They perform well for sky scanning, comet observation, and identifying deep-sky objects.
BaK4 Prism
10x50/15x70 binoculars not only use large, high-precision BaK4 prisms of MS-equivalent specifications, but also incorporate the spring suspension system from the MS prisms into the series. This provides enhanced shock resistance. The large prisms with high shock resistance not only reinforce the optical axis of its but also improve overall stability.
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