Re: First images with AP1200 GTO


peturnielsen
 

do all H-alpha filters cause halo (i'm looking to buy one and was
thinking about getting the astrodon). what h-alpha filter would you
recommend ?

Peter


$--- In ap-gto@yahoogroups.com, chris1011@... wrote:

In a message dated 6/16/2007 8:54:07 AM Central Daylight Time,
dbcoote@... writes:


These show some halos around the stars in colour but at least I am
not
clipping the data (much) any more.
This is at:-
http://www.bcoote-astro.com/eta_tri_panel.htm
That is a pretty amazing image. By the way, it is well known that
Astrodon
filters do cause halos around bright stars. It's because of the type
of coatings
they use.

Rolando


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