Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more. With their three-element air spaced objective lens design, false color is completely eliminated, yielding exceptional contrast and sharpness. The included 2-element field corrector guarantees a flat field across the entire imaging plane. The Sky-Watcher Helinear Track focusing system provides a smooth, rock-solid focuser with zero image shift. All Sky-Watcher USA Esprit refractors come with a 9 x 50 right angle finderscope, 2-inch Star diagonal, 2-element field flattener*, camera adapter, D-style dovetail and padded case. Everything you need to get out under the stars. * 80 mm apochromatic 3-element refractor * 400 mm (f/5) * Fully multi-coated * Thread-on field flattener * 2.7"" focuser w/micro focus * 2"" Diagonal with dielectric coatings * 9x50 RA erect-image finderscope * Canon camera adapter * Tube rings with CG5 style dovetail bar * Aluminum foam lined case * Weight 8.8 lbs. * 80mm Apochromatic 3-element refractor * 400mm (f/5) focal length * Thread-on field flattener * 2.7"" focuser w/micro focus * 2"" Diagonal with dielectric coatings