Quote:
Originally Posted by Atmos
Although taken from skies with approx SQM of 21-21.5 depending on the night (I don’t have a meter but this is the range that others have measured), this hits about Mag 21. Significantly less aperture than 16” though 
PGC 9408
For Sydney skies I have to say Mag 19.5 is pretty damn good. |
Thanks....but seems the link you supplied is broken
I can certainly reach Mag 21...but with mucho grande effort.... It would probably take me 8 hours and require good transparency. I was more curious about what an hour's worth would deliver.