Several years ago the Vanguard company launched a series of binoculars called the Endeavor ED, consisting of five roof prism models with the following parameters: 8x32, 8x42, 10x42, 8.5x44 and 10.5x44.
solid casing; wide field of view; slight chromatic aberration; low astigmatism; excellent distortion control; very low coma; sharp image across the whole field of view; low brightness loss on the edge of the field of view; circular exit pupils on a black background; good quality prisms made of BaK-4...
too low transmission level at this price point