The Orion Nebula and Horse Head Nebula

1100mm/F7.3 telescope
Apogee F16M cooled CCD
9-frame mosaic
LHαRGB synthesis color
total exposure time 18 hr
more details in <a href="http://www.astrobin.com/77356/B/" rel="noreferrer nofollow">www.astrobin.com/77356/B/</a>