Celestron C90 Mak Spotting Scope

{Description}Multi Coated Optics
Maksutov-Cassegrain Optical Design
Compact and Portable Design
Erect Image System for Terrestrial and Astronomical Use
Built-in T-Adapter threads for Ease of Adapting SLR Cameras
Comes with 32 mm Eyepiece, 45° Erect Image Diagonal and 8x21 Erect Image Finderscope
Backpack Made of Nylon
Limited Lifetime Warranty

{Specification}
Magnification: 39x (with included eyepiece)
Objective Lens Diameter: 90mm (3.54")
Eyepieces: 32mm Plössl (1.26")
Angular Field of View: 1.3° with included eyepiece
Linear Field of View (@1000 yds) / @1000 m): 68 ft (20.7 m) with included eyepiece
Focal Length: 1250mm (49")
Exit Pupil: 2.3mm (0.1") with included eyepiece
Eye Relief: 20mm (.78") with included eyepiece
Close Focus: 15 ft (4.6 m) with included eyepiece
Twilight Factor: 59.2 with included eyepiece
Relative Brightness: 5.3 with included eyepiece
Lens Coatings: Multi-Coated
Prism Glass (Type): BaK4
Prism Coatings: N/A
Weight: 74 oz (2,100 g)
Environmental Protection: Water Resistant
Nitrogen Filled: No
Tripod Adaptable: Yes
Carrying Case: Black heavy woven nylon backpack
Camera Adaptable: Yes
Dimensions: 400mm x 260mm x260mm (15.7" x 10.2" x 10.2") with include eyepiece
Included Items: Plössl 32mm eyepiece
45° diagonal
8x21 finderscope
Objective Lens Cover
Eyepiece Lens cap
Backpack Case