Fraser Gunn/Horsehead Nebula April 5, 2012/in User Gallery /by liyun Photographer:Fraser Gunn , Australia Astro 40D, williams optics megrez 90 f/6.9 621mm, with the dedicated feild flatner type II (x0.8 so 497mm f/5.5 ) ,12 x 10min http://www.centralds.net/cam/wp-content/uploads/2012/04/Horsehead_Nebula_2_s-1.jpg 506 763 liyun http://www.centralds.net/cam/wp-content/uploads/2020/02/c-logo5.png liyun2012-04-05 06:05:432012-04-05 06:09:52Fraser Gunn/Horsehead Nebula