Zhumell's 10x50WA long eye relief binoculars are a high-power instrument that works well at dusk. They're larger than average binoculars. However the large objective lens diameter (which adds to size and weight) has the advantage of boosting image brightness. Additionally, the rubber armor is textured to help reduce fatigue for extended viewing. And porro-prism construction assists depth perception, even at long range. The Zhumell 10x50WA long eye relief binoculars are an outstanding value -- a wonderful way to afford a higher-power binocular, and perfect for eyeglass wearers!