M13.
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.
Left : 7-8/10/1999 : Takahashi Epsilon 160, Kodak Technical Pan 2415 Hypered, 15 m.
Middle : 7-8/10/1999 : 15 m exposure, Fuji Superia 800.
Right: 05-06/04/2000 with Takahashi Epsilon 160 and ST-7. 5 m selfguided exposure.
The image below was made during the night of 28-29 May 2005. I used my APM/TMB 115 mm f/7 CNC APO refractor + field-flattener + ST-10XME with Astrodon Series E filters.
Total exposures: 30 m Luminance, 30 m Red, 30 m Green, 30 m Blue.
