By SteveIves on Tuesday, 18 August 2020
Posted in Imaging Tips
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Hi there. this is my first ever recognisable astro image - M51 taken via Roboscopes. I simply loaded my subs (along with rotoscope's supplied dark and flats) into Astap - a Mac astro stacking product - and left it on automatic and this is the image I got. My data was 120 x 60s subs, visible light. How do I get more detail? I'm good with photography and photo software - should I be adjusting exposure and levels etc and each sub individually to bring out more detail before I allow the software to stack them?  Thanks, Steve M51.jpg
Morning Steve, it was also a (OSC) one shot colour camera so you will need tips on debayer techique to convert from Mono to colour Steve
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3 years ago
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Hi,  Welcome Steve. Just wondering if you have any preference on a name for the forum, because just Steve might get confusing. Young Steve, the handsome Steve maybe? It's great that you're into photography as that is what will help get you all the embellishments once you've stacked the files, and carried out the post processing specifically designed to tidy up things which the calibration files do not fully correct. Once a few others log in later you should get some great advice regarding software and videos to watch on YouTube, in addition to their own tips. Being stuck on Windows I'm afraid I'm not familiar with any basic software for you to use, but advice will be coming from more learned members than me.  What I can say is that you will be pleasantly surprised by what you will have achieved in a short space of time. Atter posting that image you'll receive lots more friendly and helpful advice as I have done, and make good use of your photographic skills. This site is a great way into this hobby and if you get hooked there is so much choice of equipment, all at very reasonable rates. ( Hope this gets me off of the hook with Steve A after what I said earlier. )  Regards,  Ray  If another Ray subsequently joins the forum, then please feel free to address me as either the older or uglier one, or even both. 
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3 years ago
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Thanks Steve.
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3 years ago
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Thanks Ray, Yep - what I'm missing is a complete lack of knowledge regarding the workflow! With photos (from RAW) I know how to use levels, curves etc but I'm lacking that basic knowledge here, so any tips, novice videos etc will be gratefully received. Not sure about a nickname yet! Steve
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3 years ago
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Hi there,  I need some tips on typing, I'm sure I just accidentally deleted my reply halfway through.   Try again. You don't adjust the initial light frames apart from calibration, the adjusting takes place on the stacked image which should be a colour one.  As Steve said this pier has a osc camera with a Bayer matrix as there are in cameras. The camerashelpfully debayer our images into jpeg and/or raw images though. In the software you are using there ought to be an option to automatically debayer. There may be a box against the abbreviation CFA, colour filter array, if so tick it. Should it then ask for the matrix format, select RGGB. At the end you ought to have a coloured image to work with. Apologies if this does not work for some reason.  There are some free applications to tidy then stretch that image, others can advise hopefully. After that and then converting it from its linear state to a nonlinear one, your photography software of choice will be able to give final some tweaks.  Best regards,  Ray 
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3 years ago
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Forgot this. Steve please feel free to keep on and on asking questions, if I'm able to I'm pleased to help. Got so much help here myself. I just hope if I say something that's incorrect someone will correct me.   Ray 
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3 years ago
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Hi,  Welcome Steve. Just wondering if you have any preference on a name for the forum, because just Steve might get confusing. Young Steve, the handsome Steve maybe? It's great that you're into photography as that is what will help get you all the embellishments once you've stacked the files, and carried out the post processing specifically designed to tidy up things which the calibration files do not fully correct. Once a few others log in later you should get some great advice regarding software and videos to watch on YouTube, in addition to their own tips. Being stuck on Windows I'm afraid I'm not familiar with any basic software for you to use, but advice will be coming from more learned members than me.  What I can say is that you will be pleasantly surprised by what you will have achieved in a short space of time. Atter posting that image you'll receive lots more friendly and helpful advice as I have done, and make good use of your photographic skills. This site is a great way into this hobby and if you get hooked there is so much choice of equipment, all at very reasonable rates. ( Hope this gets me off of the hook with Steve A after what I said earlier. )  Regards,  Ray  If another Ray subsequently joins the forum, then please feel free to address me as either the older or uglier one, or even both. 
so that makes we the old ugly Steve then Ray ? ?? Steve
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3 years ago
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Steve A,  An honest typing error. Should have read younger and handsomer. Now relativity comes into play here. One Steve may be 39 and the other 40, hence one is younger. Regarding looks, that's subjective. George Clooney Steve, or, Bruce Willis Steve. Take your pick.  Regards,  Old and wise Ray. 
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3 years ago
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