Did this tonight, lots of moonlight about.
Only did 2x10 mins, was curious to see what it would look like using the o3 filter. Would look better with more exposures. This is where monochrome Astro CCD cameras come in handy as they get all the pixels, wheeras I was only getting green and a little bit of blue.
Scott
EDIT oops might help if I post the image
here it is
Scott
its a little dark i feel. color balance however i cant fault,no noise present, interesting composition though .did you dark subtract this, one should also consider flats and a bias to improve this particular image
I agree that with a colour camera and an emission filter that you are only getting light on 1/3 of the pixels. I wonder if it would make a difference in processing at all to convert it as b&w and then drop the red and blue channels?
Edit: RGB cameras are what, rggb these days? In that case, it would be half the pixels.
I agree that with a colour camera and an emission filter that you are only getting light on 1/3 of the pixels. I wonder if it would make a difference in processing at all to convert it as b&w and then drop the red and blue channels?
Edit: RGB cameras are what, rggb these days? In that case, it would be half the pixels.
Actually thats how I process monochrome pics with narrowband filters. With red HA filters I delete the green and blue channels (and the noise that accompanies them) as theres no signal to speak of. With the O3 shot, however there is about 1/2 the signal in blue as is green, so I reduce the blue by 50%, green 100%, red is completely deleted.
