Re: First images with AP1200 GTO


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 ?


$--- In, 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
clipping the data (much) any more.
This is at:-
That is a pretty amazing image. By the way, it is well known that
filters do cause halos around bright stars. It's because of the type
of coatings
they use.


See what's free at

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