Vivitar designs, develops, and markets affordable, easy-to-use photographic and digital imaging products that offer families and other consumers exceptional value, fine quality, and a wide range of features and benefits.PRODUCT FEATURES:Designed to exacting standards and constructed with state-of-the-art materials;Long eye relief and large exit pupil combine to make longer, more comfortable viewing possible by reducing eyestrain;Mulitcoated optics decrease image and light refraction, as well as reduce flare, which results in enhanced resolution and image brightness, making your eyes work less in order to make out details;Reliable design with ocular adjustment, which allows for vision differences.