Celestron 71198 Cometron 7x50 Porro Prism Binoculars, Black

Product Information

BaK4 is superior to BaK7: it shows a truer round view, which translates to better light transmission and edge-to-edge sharpness. Fully Multi-Coated – Fujinon have added their “special EBC coating” to every single lens and prism surface throughout the whole optical system.

The compass was well damped and the light easy to operate, but the compass light was found to be too bright and created flare into the field of vision. Waterproof – Completely sealed, this is a good choice for camping and even taking on your boat or yacht.Other important factors include ‘feel’, which combines the binoculars’ weight and size with balance, tactility and grip. The 10 sets of binoculars tested use Porro prisms (see terminology panel, below) and, with one exception, are of the fixed-focus type which is typical for water-resistant marine binoculars. Marine-3 7x50 binoculars are designed and manufactured to meet the toughest performance criteria demanded by enthusiasts and professional users observing from on-board a vessel or onshore looking out to sea. In this article, I explore and explain the reasons why the 7x50 configuration is so popular with astronomers and then at the foot of this page, I also take a look at some of the best 7x50 binoculars for astronomy currently on the market: Why 7x50 Binoculars for Astronomy?

However, as well as these, the combination of a modest 7x power with the reasonably large, but not giant 50mm objectives is also one of the most frequently used setups for observing the night sky using binoculars. The fixed focus is achieved in the same way as the depth of field on a camera is maximised with a small aperture.They feature a range finder for calculating distances (note the graduated ring behind the right-hand objective lens), and are non-floating although a swim strap is provided. Testers’ comments were favourable regarding the compact size and light weight, but some had a little difficulty reading the compass – the blue compass light sent some flare into the field of view – and the damping was found to be less effective than some of the others. Cometron 7x50’s wide field of view lets you explore expansive swaths of the sky to quickly pinpoint exactly the object you want to see, then keeps it in your sights without constant movement.

The Weems PRO 7x50 binoculars are loaded with features for discriminating professional sailors and mariners. The Visionary Classic range of binoculars provide excellent value for money without compromising image or build quality. At dusk and at night we compared them by looking at distant objects: Ryde church tower was a favourite.We picked up a mooring in Southampton Water off Calshot Spit where we tested the binoculars during the daytime by, for example, reading the names of buoys or looking at distance detail. Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC, authorised and regulated by the Financial Conduct Authority. Images of the Moon in both binoculars displayed excellent contrast and sharpness, and I could detect very little in the way of chromatic aberration in the centre of the field, with lunar craters peppering the southern highlands with impressive clarity.

A tripod adaptor bush means these binoculars can easily be mounted on any standard photo type tripod with an L Adaptor (sold separately).These were the only binoculars on test that did not come with a carry case as standard (instead this is offered as an accessory). Above is an excerpt from a review authored by Paul Money and published in Sky at Night September 20. Supplied Accessories: Marine-2 binoculars are supplied in a soft case with wide strap, rainguard and integral objective lens caps. Recent developments in lens coatings have improved them to the point where up to around 90% of the light gathered by the objective lens can be delivered to the ocular lens.