Rosette Nebula

Date: 2013-02-14

Sum of 43 shots; each one exposed for 20 seconds at 1600 ISO.

Instrumentation: Canon EOS 350D on direct focus of newton Orion 150/750 on EQ5 mount

To show you how difficult is to reveal this nebula from a light polluted area I list here this sequence of images that show the main processing phases.

Single shot

Arithmetic sum of 43 shots

Generated gradient

Gradient removed

'black' command (Iris) + filters