[brisen (Brian)]

I managed to capture some NB images last night on the central parts of the Lagoon Nebula and have run the subs through the Subframe Selector in Pixinsight. I am using an Atik 414EX with Baader NB filters on an ED120 and expected the SNR to be much lower then what is being reported by the measurement in PI.

The lights are 600 seconds captured at -10 C and the lowest SNR Weight that I got was 149.6 and it goes up to 171.5. Even a short 60 second H Beta sub is showing a SNR of 30.84 whilst the handful of luminance I captured initially, again 600 second subs, come in at 3.48 to 3.51.

I realise the whole Lagoon area is rich in HII, but am I missing something given that I was expecting the Ha subs to have much lower signal then the Luminance.

Brian