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Thread: M101 Reprocess From Last Week

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    Default M101 Reprocess From Last Week



    Hi Folks,

    I got back into town and took several more shots at this data. Kind of depressing, but I believe that using only a bit less than the last 1 1/2 hours of data gives me a better image. Shame that from over three hours of data, only the last 40 something percent produces the best image. At least I think so. I believe that the latest process has better detail.

    Please let me know which process you think is better. The latest is cropped a bit more than the original. Man, light pollution is a real image killer!


    Original process with > 3 hours of data



    New process with < 1.5 hours of data.



    Thanks everyone for looking!

    Jim
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    Default Re: M101 Reprocess From Last Week

    Much better on the repro, Jim! It looks awesome!
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    Default Re: M101 Reprocess From Last Week

    Quote Originally Posted by bladekeeper View Post
    Much better on the repro, Jim! It looks awesome!
    Thanks a bunch Bryan!

    At least with this process I feel that I caught a decent enough image. Shame that I had to toss almost two hours of data, but after the third time trying to image a target at a fairly low (30-40 degrees) altitude to my East, I must wait until my targets are higher in the sky and out of the city skyglow somewhat. If only I did not have trees to the west! It is what it is.

    Thanks again sir! Your comments are very much appreciated!

    Thanks,
    Jim
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    Default Re: M101 Reprocess From Last Week

    Agreed that the repro with only the later data looks better. It is very nice indeed! No need to be depressed. It means you can hit more than one target in a night, collecting solid data on all of them. While one target is climbing out of the muck, shoot something higher in the sky, then switch when the second target is high enough.

    There is always the option of combining data from multiple nights into one process. My best M33 comes from data collected over three years for a total of 9 hours. It gives better detail and less noise than any of the processing of individual nights. DSS does this pretty painlessly, it is just a matter of collecting the data.

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    Default Re: M101 Reprocess From Last Week

    Quote Originally Posted by bobharmony View Post
    Agreed that the repro with only the later data looks better. It is very nice indeed! No need to be depressed. It means you can hit more than one target in a night, collecting solid data on all of them. While one target is climbing out of the muck, shoot something higher in the sky, then switch when the second target is high enough.

    There is always the option of combining data from multiple nights into one process. My best M33 comes from data collected over three years for a total of 9 hours. It gives better detail and less noise than any of the processing of individual nights. DSS does this pretty painlessly, it is just a matter of collecting the data.

    Bob
    Thank you Bob!

    Yes, I have thought about imaging on separate nights and after finally getting some experience with the meridian flip, I do need to try to collect more data.

    Your idea about multiple targets sounds very good too! Rarely do I get more than one good night in a row,
    but what you have done with M33 by collecting data for years has certainly produced a beautiful M33 image.

    Multiple targets is another good option. No more wasting time in the LP!

    Thanks again for your kind words and encouragement Bob.

    Jim
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    Default Re: M101 Reprocess From Last Week

    Yes, I would agree the second composition shows better. You might want to consider, among the many other learning curves, is balancing the background color to the target. I'm new at this as well, but once I started color balancing, my images looked more natural. Newbies have a tendency to make backgrounds jet black and that is not an accurate representation of deep space. Recently I viewed a tutorial put up by Trevor of AstroBackyard and he covered the topic quite well, at least it was easy enough for someone like me to follow. Kind of like painting by numbers, the way I like it! Hang in there and keep up the good work. My progress has been curtailed for an indifinite period of time because my neighbor's fast growing trees have finally blocked my night sky views to the point where I can no longer image effectively. I can't decide whether to get out of the hobby or not at this time. Going to dark sky sites is an option, but I'll need a more portable set up and actually, the travel time and all the other things considered is not appealing to me. Moving is the only realistic option in the long run.
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    Default Re: M101 Reprocess From Last Week

    Quote Originally Posted by John999R View Post
    Yes, I would agree the second composition shows better. You might want to consider, among the many other learning curves, is balancing the background color to the target. I'm new at this as well, but once I started color balancing, my images looked more natural. Newbies have a tendency to make backgrounds jet black and that is not an accurate representation of deep space. Recently I viewed a tutorial put up by Trevor of AstroBackyard and he covered the topic quite well, at least it was easy enough for someone like me to follow. Kind of like painting by numbers, the way I like it! Hang in there and keep up the good work. My progress has been curtailed for an indifinite period of time because my neighbor's fast growing trees have finally blocked my night sky views to the point where I can no longer image effectively. I can't decide whether to get out of the hobby or not at this time. Going to dark sky sites is an option, but I'll need a more portable set up and actually, the travel time and all the other things considered is not appealing to me. Moving is the only realistic option in the long run.
    Thanks John,

    Yes, I could probably have not done that final levels adjustment in PSE. I still has some background noise after noise reduction in Startools and tried to clean it up a bit.
    I will check out Trevor. I subscribe to his YouTube channel, but I have not seen that video.

    Thanks for your very helpful comments!

    Jim
    Scopes: Explore Scientific ED102 Triplet APO, Celestron Nexstar 130 SLT.
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