Just a question
I tried capturing the nebula IC 4604 around the triple star system in Scorpius the other night and could get little of the blue nebula captured in 13 by 6 minute subs although the triple comes up well with big diffraction spikes
How do you determine as in this case the exposure time required to capture the dim nebula when I can't find reference as to its VB
or is it a case that the FOV was too tight with the 8"RC even using the FR
