M4.
05-06/04/2000 with my Takahashi E-160 and ST-7. Five minutes selfguided exposure. Image made in Montlaux, South France.
16/06/1999 : 15 m exposure with Lichtenknecker Flat Field Camera 190/200/760, SBIG ST-7a at -10° C with H-alfa filter, selfguided. This object is low above the horizon, suffering from bad seeing.