Great video, thank you. You indicated that you didn’t shoot luminance frames so you used the Ha. How do you shoot luminance with an OSC - is there a luminance filter, or do you just shoot an unfiltered RGB image and extract the luminance from it?
An excellent tutorial 👏🏾👍🏾👍🏾👍🏾👍🏾 Perhaps we can next time have just pure narrowband mono sho processing on another suitable target. Bravo and do keep them coming !!
If i had a monochrome cooled astro camera i would. Been wanting to get into straight mono but i haven't had the finances to pull the trigger as of yet :(
Very nice tutorial, thank you. Before you combine the channels with LRGB is there any advantage to using linear fit for the 3 channels before the combination, or does the narrowband normalization after you make the combined image do the same thing?
I've tried to linear fit before while using my method and there was not any notable differences in doing so. Luckily the stretching scripts do a very good job at keeping everything in the same brightness
Great video. Thanks. I do have a question about mono vs. OSC. If you dither all your subs which shifts the RGGB matrix around the target aren’t you greatly reducing, if not eliminating the mono advantage? For example, when dithering each blue pixel on your sensor is being moved to a different area of the target with each sub. So if you shot an hour each of R, G & B with mono is it really different than shooting three hours with an OSC and randomly dithering each sub? I’ve been unable to find a clear answer to this question. (I also drizzle 2x per PixInsight’s recommendation and it does improve the image.)
There is a new script DBextract that will split the channels. When you ran GraXpert it created a dark patch around the Nebula. Normally all you need to do is Background Neutralizer after running channel combination. You had selected the HA for luminance in LRGB however Narrowband Normalization uses HA to normalize the channels. When you ran NN you should have used HA for luminance. Not sure why you used unlinked stretch on each channel first. I just use channel combination and the unlinked stretch before Narrowband Normalization. The image had a greenish tint because you did not set SCNR all the way. I prefer less green for an SHO Image myself but that is a preference.
Reason being is that the Green channel has a lot better of a signal to noise ratio compared to blue thanks to the bayer matrix in these cameras being RGGB. Trying not to introduce more noise into the image as you can right from the start.
Ok cool. Thanks for your reply, very good to know and does make a lot of sense to reduce your noise. By the way i have the same filter and started doing that ,so your video is very helpful . Thanks
You’re a great astrophotographer, Outton. Thanks for the video.
Great video, thank you.
You indicated that you didn’t shoot luminance frames so you used the Ha. How do you shoot luminance with an OSC - is there a luminance filter, or do you just shoot an unfiltered RGB image and extract the luminance from it?
An excellent tutorial 👏🏾👍🏾👍🏾👍🏾👍🏾
Perhaps we can next time have just pure narrowband mono sho processing on another suitable target.
Bravo and do keep them coming !!
If i had a monochrome cooled astro camera i would. Been wanting to get into straight mono but i haven't had the finances to pull the trigger as of yet :(
@@OuttenAstrophotography OK! But, fortunately 95% of you tutorial is still relevant and applicable to mono imaging, so 👍🏾👏🏾👏🏾
Very nice tutorial, thank you. Before you combine the channels with LRGB is there any advantage to using linear fit for the 3 channels before the combination, or does the narrowband normalization after you make the combined image do the same thing?
I've tried to linear fit before while using my method and there was not any notable differences in doing so. Luckily the stretching scripts do a very good job at keeping everything in the same brightness
Great video. Thanks. I do have a question about mono vs. OSC. If you dither all your subs which shifts the RGGB matrix around the target aren’t you greatly reducing, if not eliminating the mono advantage? For example, when dithering each blue pixel on your sensor is being moved to a different area of the target with each sub. So if you shot an hour each of R, G & B with mono is it really different than shooting three hours with an OSC and randomly dithering each sub? I’ve been unable to find a clear answer to this question. (I also drizzle 2x per PixInsight’s recommendation and it does improve the image.)
Great video. Thanks!
Amazing
There is a new script DBextract that will split the channels.
When you ran GraXpert it created a dark patch around the Nebula. Normally all you need to do is Background Neutralizer after running channel combination. You had selected the HA for luminance in LRGB however Narrowband Normalization uses HA to normalize the channels. When you ran NN you should have used HA for luminance. Not sure why you used unlinked stretch on each channel first. I just use channel combination and the unlinked stretch before Narrowband Normalization.
The image had a greenish tint because you did not set SCNR all the way. I prefer less green for an SHO
Image myself but that is a preference.
Nice job. Quick question, why are you using the 0.2 and 0.8 equation when making your Oiii . Any particlar reason.
Reason being is that the Green channel has a lot better of a signal to noise ratio compared to blue thanks to the bayer matrix in these cameras being RGGB. Trying not to introduce more noise into the image as you can right from the start.
Ok cool. Thanks for your reply, very good to know and does make a lot of sense to reduce your noise. By the way i have the same filter and started doing that ,so your video is very helpful . Thanks