Rosette Nebula in H-alpha

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Date: 14 March 2010
Location: My back garden in suburban London
Exposure: 20 x 2min at ISO 800
Telescope: Takahashi Epsilon 180ED on Skywatcher EQ6 mount.
Camera: H-alpha modified Canon EOS 350D
Guiding: Nikkor 300mm lens with QHY5 camera.
Filters: Astronomik 12nm H-alpha filter
Processing: Stacked in IRIS and asinh range compression applied.
Comments: The focus drifted during the exposure time and scope collimation is slightly out.