Monoxide..... the Binned shots (both black and white) were 6 min exposures the prawn neb at my usual offset of 117 and gain of 50, i forgot to change the binning before i started imaging the other i dropped the offset to 114 ..... its a bit blurry as i think the focus was slightly off. its a much dimmer image to start with compared to normal without theHa filter as you are cutting out all the other light. However it records a much brighter image compared to 1:1 but you lose 3/4 of your image size plus any color. worth a try if only for fun.
Hagar....the Ha filters come in all sorts of bandwidths from 3nm up to about 20 ish. i chose the 13nm Astronomic check out these links
http://www.narrowbandimaging.com/fil...t_sci_page.htm
http://www.narrowbandimaging.com/com...lters_page.htm
http://www.iceinspace.com.au/forum/s...ght=narrowband
http://www.iceinspace.com.au/forum/s...ght=narrowband
i went for the 13nm because i wanted a brighter image, you can also buy a set (OIII and sulphur) and hopefully more or less matched for the job, a brighter image showing some stars also allowed me to check the focus. I did not choose the wider versions in case they sucked up some IR...... funnily enough i could look through the Ha filter in daytime and tell the sky was blue and traffic lights show some color as well so at least some extraneous light must pass through (less than 1% perhaps)..... not enough to change the image from what ive seen..... I will save it for moon nights mostly , although its hard to find stuff without goto under a bright moon. one day i would like to put together a narrowband tricolor image or two , but that will be a while away yet.