Quote:
Originally Posted by Leo.G
Many photo based packages have an eye dropper which let you sample the fringing and remove it. An older version of PS and other software I use all have it.
Which mount are you using?
I have an Astro-trac I haven't had the opportunity to use yet. I nearly got it right one night but I confused myself trying to get decent alignment with the QHY Polemaster I fitted. I've read the manual now, I was also using a 25Kg capacity gear head I'd never used (I'd only just got it) and confused my RA and DEC axis, I should know better, I have a guided mount.
Many people use the 500 rule for timing their exposures without star trailing, I tend to use 400 for better clarity with my 14mm (I use 16 seconds so maybe not 400, I can't remember how I arrived at that figure) but it's 500 divided by the focal length of the lens. A 20mm lens you're good for 25 second exposures without drifting but there are variables.
Once you get your first image that shows the slightest detail you're hooked, good hunting and clear skies!
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You are quoting me by mistake