I have observed the Horsehead nebula many times with a 20cm )(8") SCT and a 40cm (16") Dob the object requires a dark clear sky with steady seeing and most of all to look in the right place, a lot of observers tend to look on the wrong side of the Flame Neb.
a large aperture also helps and medium to high magnification, also you must not stare at the area but move your eye or the scope and use everted vision and some patients and in time it will come quite easely to you. Ron
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