When choosing your 8x56 binoculars, in addition to the size, qualitative differences in the optical coating, the types of glass used, the processing and the choice of prisms for the light transmission (effective light output) of an 8x56 binocular are decisive.
Higher-quality 8x56 binoculars by DDoptics are equipped with larger and brighter Abbe-König roof prisms, while the slightly weaker Schmidt-Pechan inverted prisms are often used in cheaper binoculars.
The design of 8x56 binoculars results in an exit pupil with a diameter of 7 mm. This roughly corresponds to the ability of the human eye to open at night or at dusk. For this reason, the 8x56 binoculars are considered the best binoculars for the night.