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

Product Information

Welcome to BirdForum, the internet's largest birding community with thousands of members from all over the world. If you happen to wear eyeglasses and wish to observe with them on, eye relief becomes very important. 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. The distance, measured in millimeters, between the observer's eye and the eyepiece lens in which the entire field of view remains visible. Higher magnification binos must adhere to stricter alignment tolerances because any misalignment is magnified more as well.

I'm currently using a secondhand pair of Hilkinson solus 20x70 - to be fair, they look as if they've never been used. There is a thick rubber coated track on top of the housing, which has a number raised oblong oval shapes on it that help with grip for when you are adjusting the focus. These special coatings are added to the glass surfaces to increase transmittance levels, for a brighter image, but also improve the view by eliminating unwanted reflections that can cause undesired results. Celestron have also included a printed scale on each eyepiece that you can use to make setting up the focus at different settings a little quicker.Then you won't miss news about our sales, new products, or our popular monthly What's In The Sky newsletter. APM Magnesium ED APO binoculars, regardless of their magnification or aperture, use quality ED (FK61) glass and BAK-4 prisms to yield high contrast, tack-sharp images over their entire field of view. 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. Unlike many telescopes, the APM Magnesium ED APO´s are portable and easy to take along on a trip, with or without a tripod.

The international elektrotechnisiche commission (IEC) classifies the degree of protection against water.A tripod L-adapter is included, and tripod use is highly recommended for extended viewing sessions due to the powerful 20x magnification. At West Building Supplies we supply a wide range of the finest timber in a wide range of pre cut sizes.