aperature is 80mm and focal length is 500mm.it comes with a 3x barlow lense,viewfinder,two eyepieces of 9mm and 25 mm.maximum zoom of 260x.i bought it from a guy for 15k 2 months back.was interested in make lunar videos.i have made a webcam modification myself .through it the zoom increased to 500x.selling that for 2k.the telescope is good shape.it was new when i bought it.used it in holidays.i am selling it because i dont have time to wake late night and do star gazing.its a very interesting hobby but very time consuming.also used to track aeroplanes and birds flying over.