But this pair also has an ESP dielectric coating, which simply means the lenses deliver excellent contrast and color fidelity, helping you see the often-minute patterns and hues on a bird’s feathers. I know what you’re thinking - these bins have the exact same magnification and lens diameter as the pair we discussed earlier, so why are they twice the price? First off, 8x42 is a great combo popular with many brands that magnification and lens diameter pairing allows for a good field of view that’s ideal for seeing deep into dark forests, tracking birds across the sky, or watching parades and football games.