Snypex Binoculars Series , New and Improved Snypex Knight D-ED 8x42 Series Binoculars With ED (Extra low- dispersion) glass prevents chromatic aberration because it gives the designer of a multi-element objective lens more options to concentrate and direct the wavelengths of light more effectively, thus they can control and minimize aberrations, in particular, chromatic aberration.  
SNYPEX Knight Optics Dielectric binoculars use an apochromatic (APO) lens design that includes high density ED glass elements and the use of the very best quality coatings like dielectric, a fully multi-coated optics, phase correction coatings Back-4 on the roof prisms, with a wide field of view, generous eye relief combined with a very comfortable and functional open bridge body design that are both fog and waterproof, Nitrogen-filled, lightweight as well as strong because of Magnesium/Alloy body on the KNIGHT D-ED 50mm , 42 mm and Polycarbonate and steel body construction on the KNIGHT D- ED 32mm which provides light weight.
Have a close focusing distance varies from of 5.56 ft. to 3.92 ft.
That all joins together and produce an extremely high quality and bright image. 
SNYPEX Binoculars New and Improved Knight D-ED 8x42 Binoculars Series.