Strong Points: The Celestron Echelon 20x70 binocular looks like it is, feels like it is and indeed is a high quality optical instrument made to very high standards using high quality components.

But at the same time, if the difference were to be mind blowing with the current crop of new binoculars what with their modern prisms and coatings I could be sorely tempted to treat myself. For telescopes, the optical diameter (also known as aperture) is the size of a telescope's main light-collecting lens or primary mirror, measured in millimeters or inches. Multiple layers of coatings are even more effective; the term "multi-coated" means one or more air-to-glass lens surface has multiple coatings. Registered Office of Faktum Ltd: Sweden House, 5 Upper Montagu Street, London W1H 2AG United Kingdom. The edge-to-edge angular diameter of the image displayed in a binocular as seen by the eyes of the observer.

Welcome to BirdForum, the internet's largest birding community with thousands of members from all over the world. As they are designed for long distance observation this should never really be a problem, but may be something to keep in mind for some.

It doesn´t matter how beautiful they are, or how much they cost if the optics don´t give you a clear, sharp, true color image of the world around you. With a pupillary distance of 16mm, the eyepiece construction is still suitable for people who wear glasses. Whilst this material may not be as cheap or as lightweight as the polycarbonate ones, it is definitely stronger and most certainly contributes to the reassuringly solid and by and large feel of a quality instrument.

Also included are details of the lifetime warranty and what you need to do should they need any servicing or repairs. It's also very portable - I found myself leaving the scope behind more and more as I just couldn't be bothered will all the clutter. So as you would expect this is far narrower than a more standard 8x or 10x bin, that can have a FOV more than double than these, but compared to other high powered bins, they compare rather favourably and far better than the 25x70 SkyMaster's Also worth noting is that the FOV on these will be much wider than that on almost all home telescopes, which is why astronomy binoculars like these are ideal for scanning the sky before using your telescope to get closer to what it is that you want to see. I think most are like me, I might try it but I cannot hold the binoculars steady enough for more than a quick look. The strap fixes to the instrument in the standard way on the sides using a slider that you thread the strap through and then back on itself.