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The Skyglow filter is my favourite broadband filter for backyard viewing from a light polluted area, but I'd have thought its effect on Omega Centauri was more aesthetic than anything else in terms of actual detail (since it's meant for emission nebula).
Anyhow, if you do get one, you'll soon notice the problem that stray light hits the filter mirror and mucks up the view if your eyepiece rubber eyecups aren't good enough. Solutions include cupping your hand around the eyepiece, buying butterfly eyecups, using a beach umbrella for light blocking and putting black cloth over your head and down to the eyepiece to block out stray light. Depending on how much light your neighbours and street lights pump out into your yard, you may want to try the black cloth trick by itself (maybe use a dark cardigan/jacket).
Regards,
Renato
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