Dark nebula B3, B4, B5 a IC348 - 29 November 2011

When I was considering what to capture during this night I found dark nebulas (B3,4 also known as LDN 1740) in the bottom of constellation Perseus in a sky map. The nebulas are very faint and it is very complicated object for DLSR to capture. Althouth the result is not good I decided to show it.

Technical information:
Optics:Canon EF 300 F4 L USM
Focal:300mm
Aperature:4
Exposure:70x3min
Date and time:29 November 2011 from 20:02 UTC
Location:Central Europe, Slovakia, Cadca, village Zakopcie
Atmosphere:clear sky
Mount:open fork
Camera:modified Canon 350D with passive cooling
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