Mewlon-300CRS with Reducer F7.2　fl.2160mm Bitran BJ-53L Starlight Xpress OAG
AstroDon SII Ha OIII filter SII90min. Ha90min. OIII90min. R=SII G=Ha B=OIII 06/07-08/2013(JST)
StellaImage7,CCDStack2, MaxIm DL5.23 & PhotoshopCS6

NGC6720"M57 Ring Nebula" Planetary Nebula in Lyra
18h53m35.2s +33 01 44 Diam76" C