You will probably be disappointed with the orion filter. Why? Just bought the narrowband myself. Got it out a couple of nights ago for only use so far and managed to look at Tarantula and Orion nebs fairly quickly. Could see more detail in Tarantula but Orion was much the same. Certainly isn't as good as a dark sky. Live in a complex with 3 street lights visible from only place to observe about 12km from Brisbane CBD and have limiting mag of about 4 and 5 on really dark moonless nights so really should be happy with any improvement. Also my only filter experience so can't compare to others.
Would be great if no one could buy anything this week as planning to get out of city on 1 night this weekend;-)
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