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

Product Information

In some ways these are quite similar to fixed focus binoculars and they have a long depth of view, but they are actually more flexible than these as you also the added flexibility of being able to adjust the focus more accurately onto objects that are a closer ranges. Observations during twilight and at night require larger optics to collect as much light as possible, but big lenses alone are not enough to ensure a superior viewing experience. To learn why a beta version is currently being tested, please see the latest posts on the {{2}}AstroBin Beta Testers forum{{3}}. The larger surface area of the lenses means they have the ability to capture more of the available light, but as you increase the magnification, the amount of light that gets through to your eyes decreases.

Both barrels should show bright, clear images that appear identical and merge into one image with relaxed eyes. This combined the fact that is is slightly curved to fit better around your neck and shoulders means that it is nice and comfortable to carry these comparatively heavy optics.It's likely that no further discussion is required, in which case we recommend starting a new thread. Higher magnification binos must adhere to stricter alignment tolerances because any misalignment is magnified more as well. Rugged, Lightweight Body: APM Magnesium ED APO binoculars have a body made from Magnesium, the lightest of the metal elements. The international elektrotechnisiche commission (IEC) classifies the degree of protection against water.

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.I didn't weight it but it has to be 50-52 oz, it is way too heavy to hand hold, and I'm above average size and stature. The APM Binoculars have an IPX-7 rating, which means they are capable of withstanding water entry for up to 30 minutes in 1 meter of water. Firstly it is another indication of a bins class and secondly, remember that as well as liquid and moisture, it will prevent dust and other tiny particles from being able to get inside and potentially spoil the optics and your view. A tripod L-adapter is included, and tripod use is highly recommended for extended viewing sessions due to the powerful 20x magnification.