Sky-Watcher's Evostar apochromatic doublet refractors are the perfect blend of superior extra-low dispersion glass and affordability. The Evostar refractor lens assembly utilizes a proprietary combination of matched lenses, delivering tack-sharp stars with charcoal-black, contrast-rich skies. All ED glass elements are fluorite-based and feature our proprietary Metallic High-Transmission Coatings (MHTC), virtually eliminating all false color while the internal baffle helps prevent stray light from affecting your photography. Like the optics, the tube is beautifully crafted using aluminum and finished with a black diamond metal-flake finish. Using a doublet refractor instead of a triplet has some advantages: less glass means less weight, less weight means a less expensive telescope, so you can dedicate more money for your camera or laptop while benefiting from a lightweight astrophotography rig. The Evostar 72ED comes in a foam-lined aluminum case with tube rings and a V-style dovetail plate. Specifications Optical Info Optical Design ED Doublet Lens Coatings Fully Multi-Coated True Aperture (mm) 72 Primary Aperture (mm) 72 F/Ratio 5.9 Focal Length (mm) 420 Observational Info Dawes Limit 161% Rayleigh Limit 1.94 Limiting Mag. 11.7 Minimum Magnification 10 Maximum Magnification 142 General Info Focuser 2" Dual Speed Crayford OTA Length (Retract/Ext.) 16.5" OTA Outer Diameter 3.5" OTA Weight (with accessories) 4.3 Accessories Mounting Accessories Rings/V-Rail Included Case Yes Corrector No (optional)
