Thank you for your comments and assistance. I don't know what kind of compression my qhy5v has. All I know is that I am using the avi function. I have checked the settings and I think everything is okay. I used the planet resolution. Honestly, I don't know what is the pickering scale, all I can say is that conditions were very good that day in Toronto eventhough there is lots of light pollution here. Toronto is a large city. Sometimes I wonder if the gain is the key, because when I adjust the gain, some detail appear but very faint. The exposure I used last time was 3x60 secs avi. After stacking all the frames and processing the image, that was the best result I could get. I used Registax5 and PS
I will try to post results for red channel once I know how to do it.
I will try tonight again, it seems that we are going to have clear skies and weather will be 9 degrees Celsius.
Again, thank you very much and I look forward to get better imaging results.