Equipment and other photo info:
Picture taken on August 19th and September 2thd, 2009.
Location: Petrova gora, Croatia, Europe
Skywatcher ED80 + WO II 0,8x, Modified Canon EOS 300D 25x480sec @ ISO1600 for hAlpha, Canon EOS 400D 14x240sec @ ISO800
Guiding with Maksutov 90/1250 + QHY5 guiding camera (PHD Guiding)
Mount: EQ6 Vis upgreded to EQ6 SynScan

Processing software: DeepSkyStacker, PixInsight 1.0, Photoshop CS2

Object info:
The Sh2-155 (Sharpless 155), or Cave Nebula, is a faint but large region of double ionized hidrogen, surrounded by dust, that lie in the constellation Cepheus. The area is rich in detail and very colourful, due to the red emission from ionized hidrogen and the blue of reflection nebulae. The area is populated by many dark nebulae, some very prominent and detailed. One of these is the the central “cave-like” structure. (text from

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