The top of the range Celestron Granite roof prism binoculars come in 8x42, 10x42, 10x50, 12x50, 9x33 and 7x33 configurations and feature which reduces color dispersion and helps prevent prevents and therefore is able to produce a superior image with minimal (or none) color fringing, improved sharpness and clarity with exceptional light transmission and remarkable color resolution and contrast.
The two telescopes in binoculars are aligned in parallel (collimated), to produce a single circular, apparently three-dimensional, image. Misalignment will cause the binoculars to produce a double image. Even slight misalignment will cause vague discomfort and visual fatigue as the brain tries to combine the skewed images.
Most binoculars have a strong masculine look to them, but a few manufacturers have decided to design binoculars with a softer, more feminine look to them.