Discover the wonders of the night sky with this digital telescope. The 102mm aperture and a 612mm focal length give a wide view and a high contrast. This telescope has been Ronchi-tested and star-tested to ensure razor-sharp images and has superior refractors with handcrafted broadband multi-coating on each surface to eliminate false color. The rotatable 2" Crayford dual speed focuser has a smooth operation, great feel and precise adjustability.