Home 55FL OTA and Mount Package [55FLSW] 55FL OTA and Mount Package Aperture 55mm Fluorite Focal length 250mm F-ratio 4.5 Lens configuration 2 elements in 2 groups Coating Fully multi-coated Physical length 200mm Tube diameter 60mm Weight 715g Filter 58mm Parts included Includes 2555, 7761, 7603, 7205, 7522, 7317, 7065, 8992 & 3112 Notes Perfect backpack-enabling system. Easy system conversion into imaging configurations. Price $1,150.00