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Celestron 71454 Echelon 20x70 BaK-4 Prism Binoculars, Black

£94.995£189.99Clearance
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However apart from this, the porro prism does have a number of advantages. The first is that because the objectives are placed further apart, you get more of a stereo effect with a better perspective and sense of depth. The soft plastic objective lens covers fit nicely over the ends of the 70mm barrels without being too loose or tight. These long range/astronomy binoculars are quite a bit bigger an heavier than your average general use or birding binocular and so having a case that is designed to be carried out in the field is actually not really needed. So it is fantastic to see that Celestron have included a very high quality hard case that offers the best protection possible for your optics.

Celestron Echelon binoculars are manufactured using quality Japanese optics and are assembled by hand by skilled technicians in Southern California. One of the big improvements between this Echelon and the SkyMaster is the fact that these have Fully Multi-Coated optics, whilst the Sky Master's are only Multi-Coated. Not compatible with #93648 Off-Axis Guider, not compatible with #93519 2" Mirror Diagonal (discontinued)The eye-relief is really long, which for those who wear glasses whilst using bins is really important and their field of view is pretty good and up there with other 20x binoculars. Whilst the individual focus system is perfect for most cases where you have the focus set to infinity for long distance viewing, I did find at times that I also wanted to get a better look at say a bird at the end of my garden. Here having to adjust each eyepiece is a little slow and so even though they are not really designed for nearer distances, I personally would have preferred a single central focusing wheel. The Celestron 20x70 Echelon Binoculars have 19.5 mm of eye relief, making them comfortable for all users, whether they wear eyeglasses or not. The rubber eyecups position your eyes at the perfect distance from the optics for a full field of view.

Another quite important difference between these high end Celestron Echelon binoculars and the entry level Skymaster's is that the body on these has been fully sealed and they are described as being waterproof, whilst the Skymaster's are not. They are pretty simple and don't have a loop or another way of keeping them attached to the binocular when not in use which is a little bit of a shame as after a time it does become somewhat painful having to find and replace them after every use. So what often happens is people eventually leave them off, which in turn means dust gathers on your lenses, which means more frequent cleaning is necessary and the potential to damage the lenses or coatings. Most binoculars have between 10 and 18 glass surfaces, all of which can potentially end up reflecting light in an unwanted way, so if all of these are treated you can get a big improvement in brightness and quality: Transmittance Levels These really are a great pair of long distance and astronomy binoculars. The higher price may put off many casual observers or those newer to the hobby but for those who are more serious and/or are looking for a great quality view then these really are hard to beat and a big improvement on their SkyMaster Series in my experience. It is always good to have a binocular that is well balanced as it makes it much easier to keep completely still and use over long intervals, but with a large binocular like this with a powerful magnification, balance becomes a very important feature when using them without the aid of a tripod: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. Due to volume of frames we manufacture every year we benefit from buying our materials in bulk, passing our savings on to our customers. Not much to report here, other than to say that the colors look nice and natural and free of any artificial tinting that I sometimes witness, especially on cheaper optics. Apart from the typically elongated barrels found on most on high powered binoculars, the overall shape is essentially the same as that of most porro prism bins with the eyecups being closer together than the objectives. Whilst this traditional body shape is necessary due to the design of the roof prisms and the way the light passes through them, it also happens to make for a fantastic ergonomic shape that feels very natural as well as comfy and secure to hold in your hands. 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).

When your size of your pupils are the same size or smaller than the exit pupil (In good light conditions), it is not a limiting factor. However when it gets darker and your pupils dilate, bins with smaller exit pupils will seem less bright than equal quality ones with larger shafts of light exiting them. In good light they looked to be about equal, which once again, because my pupils were probably smaller than both the exit pupils, is not surprising. Proper fraction button is used to change a number of the form of 9/5 to the form of 1 4/5. A proper fraction is a fraction where the numerator (top number) is less than the denominator (bottom number).So the observations below are based on my experience and my comparisons to my high end benchmark 10x42 binoculars are there for interest:

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