Niels V. Christensen
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LX200ACF 16" telescope. Atik 460ex mono camera. Baader filters used. Telescope mounted on wedge in polar position.
M57 shown here as a composite color picture. Picture information consist mainly of Ha=32*5min and LUM=64*1min. exposures taken during 4 nights in June 2013. Some OIII and SII information/subs have also been added to the picture via Photoshop features. Exposure time OIII/SII=17*5min. Old RGB data/few subs from 2008 also used.