Esprit EDX 150 Super APO Triplet

Designed with the discerning astrophotographer in mind, Sky-Watcher’s top-of-the-line Esprit EDX 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 and knife-edge baffles, false color is completely eliminated, yielding exceptional contrast and sharpness. The optional two-element field corrector guarantees a flat field across the entire imaging plane. The Sky-Watcher exclusive linear-track rack-and-pinion focusing system provides a smooth, rock-solid focuser with zero image shift. All Sky-Watcher Esprit EDX refractors come with mounting rings, dovetail plate, and foam-lined hard case. Everything you need to get out under the stars. Optical Specifications Optical Design (achro or apo) Super-Apochromatic Lens Coating (fully multi-coated)? Fully multi-coated Lens design (doublet, triplet or Quad) ED Triplet (Air Spaced) Optical Quality Diffraction limited (1/4 wave) Collimatable Cell Yes (Push/Pull Cell) Primary Aperture (mm) 150mm F/Ratio 7 Focal Length (mm) 1050mm Optional Corrector Specifications Field Flattener or Reducer? Flattener Thread-On or Insertable Thread-On Corrector Thread size M65x1 female/M62x1 male Corrector Back Focus 96mm Corrector illuminated field 43mm Corrector adapter needed? Yes (Included with telescope) Corrector allow for 2" filters? Yes Optional Corrector/Reducer Specifications Corrector Name Esprit 150ED 0.77x reducer/flattener Optional Corrector/Reducer SKU S20215 Reduction (reducer only) 0.77x Corrector - insertable or thread-on Thread on Corrector Thread size M74x1 female/48mm male Corrector Back Focus 90mm Corrector illuminated field 36mm F/Ratio with reducer installed 5.4 Focal Length with reducer installed 810mm Corrector adapter needed? No Corrector allow for 2" filters? Yes Mechanical Specifications Focuser Type Linear Rail Rack & Pinion Focuser Size 3.4" Focuser: Dual or Single Speed Dual speed (11:1 ratio) Focuser: Rotatable? Yes Camera Adjuster Yes Compression Ring Yes Drawtube thread size M74x1 Retractable dew shield? Yes OTA material Aluminum Optical Tube length Retracted/Extended (inches) 36.9"/40.5" Dew Shield diameter (inches) 7.89" Optical Tube weight with included accessories (pounds) 34 pounds Mounting Rings? Yes Mounting Ring hole thread size(s) 1/4-20 (top threads) Dovetail type D-style Dovetail length 13" Accessories Eyepieces No Diagonal None Handle Yes Mounting Hardware Mounting Rings/Dovetail Flatter or Corrector Optional Additonal Accessories None Collimation eyepiece No Included finder None Manual No (PDF online) Case Yes Case Dimensions 42"x17"x13.5" Shipping Weight 77 Shipping Dimensions/Weight 49"x21"x17" Observational Info Dawes Limit 0.77 Rayleigh Limit 0.93 Limiting Magnitude 13.3 Minimum Magnification 21x Maximum Magnification 295x Light Gather (compared to next size down) 71% (compared to Esprit 120EDX) Intended use Visual/Imaging