Explore Scientific FirstLight AR90mm Tube Refractor w/AZ Mount White. f/5.5 Refractor with Flint and Optical Crown Air-Spaced Doublet; Fully Multi-Coated Optics; Metal Tube; Classic White Finish; Single-Speed 1.25-inch R&P Focuser; Alt-azimuth Mount with Altitude Slow Motion Control on Folding Metal Tripod with Accessory Tray; Red Dot Finder; 25mm 1.25-inch O.D. Plossl Eyepiece; Smartphone Camera Adapter Specifications for Explore Scientific FirstLight Tube Refractor AR90mm: Manufacturer: Explore Scientific Color: White Objective Lens Diameter: 90 mm Focal Length: 500 mm Focal Ratio: f/5.5 Condition: New Package Contents: Explore Scientific FirstLight Tube Refractor AR90mm 90mm Dia. f/5.5 Refractor with Flint and Optical Crown Air-Spaced Doublet; Fully Multi-Coated Optics; Metal Tube; Classic White Finish; Single-Speed 1.25-inch RP Focuser; Alt-azimuth Mount with Altitude Slow Motion Control on Folding Metal Tripod with Accessory Tray; Red Dot Finder; 25mm 1.25-inch O.D. Plossl Eyepiece; Smartphone Camera Adapter