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Horsehead is not easy visually from what I understand, needs lots of aperture ie a big scope and a dark site !! It is a dark area with an even darker object. From my LP site I cannot discern anything in that region with a 10" newt although I have obtained faint images when I push the processing.
Use Stellarium or any other similar app to locate the Horsehead first. It is slightly sth and west of Alnitak within the triangle of stars by Orions 'belt'.
Can't comment much on the H Beta Filter but I understand it is a very narrow band with limited scope for most objects.
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