The Skywatcher Evostar 80ED is an apochromatic doublet refractor that offers high performance for visual observers and astrophotographers. The objective lens features an element similar in performance to FPL-53, extra-low dispersion glass (ED) that minimizes the chromatic aberration for the best colour correction. As a result, planets and the moon are sharp at high magnification and in astrophotography, images have a high contrast as stars are not surrounded by the purple halo due to chromatic aberration. The Evostar 80ED is available either on its own or with the 0.85x flattener/reducer for astrophotography. The 2" Crayford focuser is solid, precise and backlash free. It operates at two speeds due to the 10:1 reduction mechanism for an extra fine focusing adjustment, which is paramount for astrophotography and high resolution observations. The objective lens is fully multi coated with the Skywatcher proprietary "Metallic High-Transmission Coating" (MHC) for an effective anti-reflection result that approaches a transmission of 99.5%. The aluminium tube is light-baffled and blackened to ensure high contrast absorbing stray light. The Evostar 80 ED is an excellent telescope for astrophotography. Its chromatic correction is the highest of all the other Evostar telescopes and its small dimension and affordable price makes this telescope the best entry level apochromatic refractor for astrophotographers. Its sharpness and colour correction makes this telescope ideal for sun and moon eclipses and sun observations (with a full aperture filter) especially with a Barlow lens to increase the focal length. The sunspot AR 12192 has been the largest sunspot of the last 3 decades with a size of 129.000 km. Image taken with the Evostar 80ED, Canon Eos 6D at direct focus (image cropped), full aperture ND5 Astrosolar filter. Sydney, Australia 23 October 2014. The Moon Eclipse magnitude 1.69. Image taken with the Evostar 80ED, Baader FFC 3x-8x, Canon Eos 6D .Sydney, Australia 28 July 2018. Specifications Optical design Apochromatic ED doublet Objective diameter 80 mm Focal length 600 mm Focal ratio f/7.5 Resolving power 1.50 arc second Stellar limiting magnitude 11.5 Max. magnification 160 x Light gathering power 131 times the human eye Mount attachment Tube rings on Vixen bar (rings are 183 mm centre to centre apart) Focuser Crayford dual speed (10:1) Tube weight 2.5 kg Tube length 620 mm Tube diameter 100 mm Dew shield diameter 115 mm SKU SWBDED80-OTA Items included Evostar 80ED with dual speed focuser 2" mirror diagonal (90°) 2" to 1.25" adapter for the diagonal 2" to 1.25" adapter with M42 thread 8x50 finderscope with fast release bracket Eyepiece LET 28mm Tube rings with Vixen style bar Piggyback 1/4" screw with camera locking nut Foam-lined aluminium carrying case
