New generation improved focuser design with digital read out (DDG). Reviewed by Sky and Telescope in May 2007. Package includes Soft protected carrying Case and Black Mounting Rings. at an incredible price! Stellar value! Megrez 90mm air spaced FPL-53 objective with STM coatings f/6.2 Comes with new digital read out feature, 360° rotating camera-angle adjuster with integrated dual speed microfocuser. 　 　 Aperture 90mm Focal Ratio F/6.2 Focal Length 558 mm Objective Type FPL-53, Air Spaced, Fully Multi-Coated, STM coatings Resolving Power 1.35" Limiting Magnitude 11.5 Lens Shade Retractable New 2" DDG Focuser 2" DDG Feature with 360° Rotating Camera-angle Adjuster, dual speed 1:10 fine focus Focuser Travel Length 3.15"(80mm) 1.25" Adapter Included 1.25" Adapter Brass Compression Rings Mounting Rings Included Field Stops 2 knife-edge Baffles Tube Diameter 90mm Tube Length 442 mm Fully Retracted, 522 mm Fully Extended. Tube Weight 7.3 lbs.( 3.30 kg) Case Soft Protected Carrying Case (Included) Soft Protected Case Dimensions (WxHxD) 21"(W) x 8"(H) x 6"(D) (Water Resistant)