[b][b]Features:[/b][/b] [list] [*]Optical Design: Refractor [*]Caliber: 90mm [*]Optic Coated: FMC [*]Objective Lens: Doublet air spaced achromatic design [*]Focal Length: 500mm [*]Focal Ratio: F/5.5 [*]Eyepiece Barrel Diameter: 2-inch (w/ 1.25 inch adapter) [*]Focuser: 2 inch crayford focuser ,Double Speed Focuser [*]Millimeter markings on focuser drawtube: Yes [*]360-degree rotatable: Yes [*]Dust plug: One 1.25" dust plug included [*]Finder scope Bracket: Yes [*]Mount Type: Dovetail Plate [*]Dovetail Plate Length: 100mm [*]Net Weight: 2.48kg / 87.45oz [/list]