Personally I think Gordon's looks better. Less manipulation and purer colors. I personally don't care for the excessively smoothed background. But that is way too common these days. Like a bad flu it spreads.
still it is a nice image
as for 3nm filters; you get more junk that is not the oxygen line when you use wider filters so if you simply want to fill up your wells faster then use wider filters. if you only want the line in question then a narrower filter is appropriate.
filters and their passbands are misunderstood by many. the Custom Scientific 3nm filters are superb but sometimes people confuse fast filling wells that have other emission besides the line in question with wells that are filling with only the data being sought. The Astrodons are simply overpriced in my opinion. The value is not there in my assessment but that's what happens when you are dealing with outsourced manufacturing: everyone in the food chain wants their markup which is fair, but you can cut out the middleman that adds no value shy of marketing by going to the source.
