Explore Scientific AR152 f/6.5 Air-Spaced Doublet Achromat Refractor Telescope. This telescope created by the product experts at Explore Scientific comes with heavy-duty high quality components including a 2" dual-speed Crayford-style focuser a one-piece 2" diagonal with 99percent dielectric coatings an 8x50 non-illuminated straight -thru finderscope and quick release bracket and a cradle ring assembly with Vixen-style dovetail mount. The Explore Scientific 152mm AR Doublet Achromatic f/6.5 Refractor Telescope will be able to handle the rigors of public star parties and educational outreach. The Explore Scientific 152mm f/6.5 Air-Spaced Doublet Achromat Refractor Telescope let's you discover the Universe in great detail. Specifications for Explore Scientific 152mm AR Doublet Achromatic f/6.5 Refractor Telescope: Focal Length: 988mm Focal Ratio: f/6.5 Limiting Magnitude: 13.4 Resolution: .77 arcsec Tube Length w/ Dew Shield: 41"; 1041mm Diameter: 158mm Weight: 23lb; 10.7kg Dovetail: Vixen Package Contents: Explore Scientific 152mm f/6.5 Air-Spaced Doublet Achromat Refractor Telescope Explore Scientific DAR152065-02: AR152 f/6.5 Air-Spaced Doublet Achromat Refractor Telescope