Hi guys,
I am doing some research on getting a narrow band 3nm HA filter for mono imaging from severely light polluted Brunswick here in Melbourne.
So imagine the shock I got when I saw the cost of these things! My goodness!
Although they are cheaper in say the higher HA range like 6nm, 10, 12nm, seeing that I am only 5.5 KM from Melbourne CBD, wanting to go as narrow as I can if possible to 3nm in HA.
Has anyone sourced filters and used filters from OMEGA:
http://www.ebay.com/usr/bjomejag?_trksid=p2047675.l2559
http://www.omegafilters.com/products...ss/588bp5.html
Clear skies,
John K.