Otherwise, the 7x35s and 7x50s share the same basic features, including multi-coated eyepiece lenses and BaK-4 prisms.
The 7x50s' 50mm objective lens diameter allows greater amounts of light into the prism system, resulting in brighter overall image quality and exemplary dim light/night performance. Their multi-coated eyepiece lenses reduce light loss and glare, resulting in a brighter, higher contrast image and reducing eyestrain. Additionally, the 7x50s' prisms are composed of BaK-4 prism glass which is very high-grade glass for binocular construction, providing greater brightness and sharpness than cheaper BK-7 prisms.
