[6370]71FL Mini Borg Basic OTA Set Part # 6370 Description 71FL Mini Borg Basic OTA Set Aperture 71mm Fluorite Focal length 400mm F-ratio 5.6 Lens configuration 2 elements in 2 groups Coating Fully multi-coated Physical length 400mm Tube diameter 60mm Weight 0.7kg Filter 72mm (front hood) Parts included 2572, 7861, 2 x 7604, 7603, 7602 & 7601 Notes Needs a 2-inch holder for visual use