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The bodies of the Helios Lightwing HR series are also fully sealed. I bought them to replace a 10" telescope that was getting too heavy for me. The Helios Quantum Observation Binoculars is the flagship model for this brand. Features BaK-4 prisms and a fully broadband multi-coated optical system. The Triangulum Galaxy, M33, showed a mottled effect that hinted at its spiral structure and, despite being at low altitude, the Pinwheel Galaxy, M101, was unusually distinct. 5892293VAT No. It works with a fully multi-coated optical system. Some of the products that the Helios Brand produces today include: Personally, I didnt quite know anything about them until I got several requests from my UK readers to review them. FEATURES Shockproof design incorporating a robust but lightweight Magnesium alloy body construction Nitrogen filled for clear, fog-free operation. Rapide has the capacity to provide a good optical performance. We thoroughly enjoyed scanning colourful star-fields with these. This is a reassuringly bright pair of binoculars. There is the use of nitrogen-purging for a fog free operation. The binocular has a wide field of view of 7.2 degrees. The Helios OceanMaster RC Binoculars is anther 7X50 waterproof marine binoculars. It is comfortable to hold. Rather than just specifying these binoculars as waterproof Helios has rated them as IPX7, which means they will keep water out when totally immersed to a depth of 1m or for 30 minutes. The technology ensures that the binoculars remain waterproof at all times. Helios Ultrasport roof prism binoculars also have the modern open hinged bridge system. Thanks to the ability of the large lens to gather more light in dark spaces. This is a very impressive pair of binoculars, great for observing objects in the night sky. This is a system that allows up to 85% light transmission. Observational Binoculars - Rother Valley Optics Ltd On a Moonless night under a suburban sky, the nearer edge of the Andromeda Galaxy, M31, had a more abrupt edge because of its dust lane. Like the Quantum, Apollo models also use a robust design that incorporates all-metal body armor. There are many reasons why the neck strap is also an important addition to a binocular. This is the preferred option for astronomy, meaning you can set the focus and then leave it alone. Coma Berenices was well placed so we used Melotte 111 to determine limiting magnitude. This is a medium-sized high quality Helios binocular. The G400 binoculars are suitable for astronomy and general use, and during testing we found them a joy to use. All rights reserved. If you have a light to mid sized tripod, you might be better off with 15x70's. Good luck! It has a retail price of about 199 in the UK. Celestron Skymaster 25x70 @ 70 2.