Quote:
Originally Posted by TrevorW
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
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You just need to shoot a lot more exposures. If it's a dark site and you have very little sky glow you can go for long exposures. If it's light polluted then you have to compromise and shoot a lot of shorter exposures and try to get the best SNR. Stack a lot of them and eventually you'll get all those photons.
