I am delighted to have purchased these binoculars. As others may say, it looks like these binoculars illuminate their target. The world is more beautiful through H2O Buschnell (10x42), the 8x42 seemed to me too small to follow a detail. To observe nature, 10X42 are the minimum required. Also it are BAK 4 (highest). Top notch. Received very quickly. Amazon thank you.