Planetary nebula NGC 7293 (Helix) - 05 September 2010

This is my second attempt to catch Helix nebula. This one is better because of longer exposures and better processing.

Technical information:
Optics:Newton 36cm + Paracorr + Baader UHC-S filter
Focal:1725mm (1500mm*1,15 due to comacorrector)
Aperature:4,8
Exposure:15x12 min
Date and time:05 September 2010 from 20:15 UTC
Location:Central Europe, Slovakia, Cadca, village Zakopcie
Atmosphere:clear sky
Pointation:own autopointer + webcam Logitech Pro 4000
Mount:open fork
Software:ImagesPlus + Photoshop
ISO/ASA:1600
Camera:modified Canon 350D
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