D. Jung:In all the threads i read on the subject, it seems that ha and sII with mono filters will get poor amount of signal on an osc, giving the fact that only 25% of the sensor will capture it (in the red channel).
Seems logic, and backed by many threads. Did i miss something ?
I strongly recommend Raul Hussein script for narrowband processing too, its simple and very efficient.
A single and dual narrowband filter will give you exactly the same signal on the same OSC sensor for Ha/Sii/Oiii if they have the same bandwidth and if you disregard channel mixing.
Using a OSC will not give you 25% of the signal, you will use 25% of the sensor to reconstruct the whole image using the debayer process. This will result in reduced resolution/increased noise compared to using a mono sensor. The signal in those 25% is reduced due to the filter array transmission to 65-80ish% depending on which channel and camera is used.
Thanks for this clearer answer, i lacked the right terms.
