
Click on the image
for a higher-resolution version.
M8 and M20 are
seen together in this image. Near the top is the open star cluster M21, while to the left
(east) of M8 is the emisson/reflection nebula NGC 6559.
Equipment: ST-10XME/Astrodon
RGB filters/Nikkor 180mm ED f/2.8 lens/Losmandy-Gemini G-11
F-ratio: f/4
Exposures: LRGB: L 11 x 3 minutes: R 8 x 3 minutes: G 8 x 3 minutes:
B 8 x 3 minutes: RGB binned 2x2
Date: July 21 and 22, 2006
Location: Mount Laguna, California, USA
Technical Notes: All exposures were taken unguided. The individual
exposures were sigma combined and the RGB image assembled in Registar 1.0. A Gaussian
Blur of 1 pixel was applied to the RGB image and a high pass filter selectively applied to
the luminance image.