Refractor telescope aperture 102 mm focal length 500 mm focal ratio 149 optical systems fraunhofer achromatic refractor max useful magnification 204 x tracking altazimuth mount altazimuth goto synscan az s tripod aluminium tripod features red dot viewfinder minimum useful magnification 14 eye piece 125 included in delivery amici prism synscan controller eyepiece adapter 125 2