This tends to let me conclude that for a high powered bin like these, these are pretty good low light performers. Sure a super giant 20x100, would be even better, but you just try and hand hold one of those! Because you have to adjust each eyepiece separately, it does take a little longer to focus on closer objects than most "normal" binoculars that only require you to turn a single often centrally located focus wheel that adjusts the focus on both eyepieces simultaneously. Celestron’s large-aperture Echelon series binoculars were designed for use in low light conditions. Whether you are long-range glassing across a field or valley, or gazing at the splendors of the Milky Way, a pair of Celestron Echelon binoculars will get the job done. With an exit pupil of 3.5 mm, these binoculars deliver an amazing amount of light allowing you to see the most detail possible. This pillow provides unparalleled breathability and support. A supportive foam centre lies within the heart of the pillow to offer optimum support. Specially designed to increase airflow and circulation, the Airmax pillow features an air mesh sidewall to help air to move freely around your head to prevent overheating and to keep you comfortable for a restful night’s sleep. Silentnight is the UK's number one sleep brand, with over 70 years of experience in creating products that offer solutions for every sleeper.

Unlike the cheaper Skymaster's where Celestron do not specify the main housing material, but which I presume to be polycarbonate, they proudly advertise that this 20x70 Celestron Echelon and indeed all the others in the series are made from aluminum. 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. What is more, they have also been nitrogen-purged. This means that all the internal air has been extracted and replaced with nitrogen gas which seals the internal optics from fogging. As we know these come with large 70mm diameter objective lenses combined with an also reasonably powerful 20x magnification. Both these attributes affect how they perform optically, especially when we consider how well they operate in sub-optimal light conditions: Ideal For: Whilst these are obviously quite a bit bigger and heavier than your average birding binocular it is still quite possible to hand hold them and use them in some situations, even with the massive 20x magnification. Thus with or without a tripod, I can see them being very useful for a wide selection of long range terrestrial uses and of course as a great set of astronomy binoculars. The published width is 22.2cm (8.74in), this is with the hinge fully open (IPD set to max), this width can reduce to 20cm when you close the hinges (IPD set to minimum).

Converters

They will also make ideal bins for anyone who wants to scan distant terrain in search for something like wildlife for example and so in some cases could be very useful to hunters, if transporting them in the field is not such a big issue.

x 20, 12 x 45, 19 x 45, 20 x 20, 20 x 32, 20 x 45, 20 x 70, 20 x 95, 20 x 120, 20 x 145, 20 x 170, 20 x 195, 20 x 220, 32 x 33, 33 x 45, 32 x 70, 32 x 95, 32 x 145, 45 x 45, 45 x 70, 45 x 95 At 1650g / 59oz, they are as you can see from the table above a little more than double the weight of most standard sized bins. However they compare well to other giant binoculars and whilst they are heavier than the SkyMaster, remember that these have higher spec features like a full aluminium body, rather than a polycarbonate one that many cheaper bins will use.Keeping in mind that my 10x42 benchmark has an exit pupil of 4.2mm (42 ÷ 10) and these have a 3.5mm (70 ÷ 20) exit pupil, it is not surprising that even though it was quite difficult to tell because of the large magnification difference, I did think that my benchmarks were brighter in low light, but the difference was not huge and you do of course get a much more detailed image with these Echelon's. Your picture frames should provide a focal point, adding character or colour to a space. Remember, it’s all about proportion – and while a large picture or photo frame will look good on a big wall, a small frame will be lost. Celestron Echelon binoculars sport high quality 70 mm objective lenses made in Japan. Superior BaK-4 prisms were chosen for maximum contrast and sharpness, and all air-to-glass surfaces are multi-coated with Celestron’s proprietary XLT optical coatings—the same high transmission coatings used on our observatory-grade telescopes to increase contrast and resolution.