IC405 Hydrogen-alpha Images

IC405 is an emission nebula glowing richly in red H-alpha light. By
employing a selective spike filter that passes only the H-a emission
line, one can block out light pollution and even the effects of a
nearby full moon.

You may view filtered and non-filtered views of IC405 that illustrate
the unique properties of the H-a filter at
http://home.att.net/~dpersyk/new.htm

I hope you will take a look and find the comparison interesting.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL