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I seem to have great difficulty getting a good result on M101. It feels like it should be a relatively easy target - well placed for me, bright, nice contrast plenty of structure etc. But it just never seems to be that easy, for me at least.
This was a bit of an experiment using lower gain (gain 0, 120s) and a shorter exposure as I was having trouble with my background in the previous image. I'm not sure it made much difference overall. Its better than my previous M101's but still not where i'd like to get to with it.
This is 160 x 120s, with the SW Evostar 80ED on the NEQ6 and the ASI2600mc
C & C appreciated
full res can be viewed here
edited to provide rev with green cast removed.
Scope: Skywatcher Evostar 80ED (SW 0.85 FR/FF) on a SW NEQ6Pro
Guiding; SW Evoguide 50ED, ASI 120mm mini
Meade 8" LX200 GPS on wedge (Guided with a cheapo 50mm guidescope and a ZWO ASI 120mm mini)
Sharpstar 61EDPH II (with dedicated 0.8 reducer) with wiliam Optics 32mm uniguide
Camera: ASI2600MC pro. QHY 163M with ZWO 7nm NB filters, Canon EOS700D astro mod
Secondary mount: Skywatcher StarAdventurer
I absolutely understand what you mean about capturing/processing M101. I really thought that I would have a better image my last time. It is my best so far and I like it, just not quite what I was hoping for (I really don't know what I was hoping for).
Like all deep sky targets, they can be processed in an infinite number of ways. In the end though it is what looks good to you and makes you happy. I know a lot of folks like super bright, colorful and sparkly images, but just me, I like more of a subtle look. More "natural" looking.
Your image is really quite nice! Wish that I could have gotten that nice of an M101 from my PI process. Maybe one day I will have the skills!
Jim
Scopes: Explore Scientific ED102 APO, Sharpstar 61 EDPH II APO, Samyang 135 F2 (still on the Nikon).
Mount: Skywatcher HEQ5 Pro with Rowan Belt Mod
Stuff: ASI EAF Focus Motor (x2), ZWO OAG, ZWO 30 mm Guide Scope, ASI 220mm min, ASI 120mm mini, Stellarview 0.8 FR/FF, Sharpstar 0.8 FR/FF, Mele Overloock 3C.
Camera/Filters/Software: ASI 533 mc pro, ASI 120mm mini, ASI 220mm mini , IDAS LPS D-1, Optolong L-Enhance, ZWO UV/IR Cut, N.I.N.A., Green Swamp Server, PHD2, Adobe Photoshop CC, Pixinsight.
Dog and best bud: Jack
Sky: Bortle 6-7
My Astrobin: https://www.astrobin.com/users/Juno16/
Juno16 wrote: ↑Fri Apr 16, 2021 3:30 pm
That is a very fine rendition of M101 David!
I absolutely understand what you mean about capturing/processing M101. I really thought that I would have a better image my last time. It is my best so far and I like it, just not quite what I was hoping for (I really don't know what I was hoping for).
Like all deep sky targets, they can be processed in an infinite number of ways. In the end though it is what looks good to you and makes you happy. I know a lot of folks like super bright, colorful and sparkly images, but just me, I like more of a subtle look. More "natural" looking.
Your image is really quite nice! Wish that I could have gotten that nice of an M101 from my PI process. Maybe one day I will have the skills!
Thanks for that Jim, Yes I think that the potential variation of final output from the same data set is both one of the joys and one of the difficulties of this hobby. you are always left with the feeling that one more repro could produce the killer image!
PI is really great but iIseem to have hit a bit of a speed bump with it right now as I am really struggling to get decent backgrounds. I started tryng masked stretch and EZ soft stretch and while they seemed to produce good initial stretches I found the backgrounds became really nasty as I moved on. So I've consciously gone back a couple of steps in my progress to try to regroup. I am seriously thinking about getting the Adam Block's tutorial set but I'm not sure I am ready (or able) to put the amount of time into it to justify the cost.
take care
David.
Scope: Skywatcher Evostar 80ED (SW 0.85 FR/FF) on a SW NEQ6Pro
Guiding; SW Evoguide 50ED, ASI 120mm mini
Meade 8" LX200 GPS on wedge (Guided with a cheapo 50mm guidescope and a ZWO ASI 120mm mini)
Sharpstar 61EDPH II (with dedicated 0.8 reducer) with wiliam Optics 32mm uniguide
Camera: ASI2600MC pro. QHY 163M with ZWO 7nm NB filters, Canon EOS700D astro mod
Secondary mount: Skywatcher StarAdventurer
Juno16 wrote: ↑Fri Apr 16, 2021 3:30 pm
That is a very fine rendition of M101 David!
I absolutely understand what you mean about capturing/processing M101. I really thought that I would have a better image my last time. It is my best so far and I like it, just not quite what I was hoping for (I really don't know what I was hoping for).
Like all deep sky targets, they can be processed in an infinite number of ways. In the end though it is what looks good to you and makes you happy. I know a lot of folks like super bright, colorful and sparkly images, but just me, I like more of a subtle look. More "natural" looking.
Your image is really quite nice! Wish that I could have gotten that nice of an M101 from my PI process. Maybe one day I will have the skills!
Thanks for that Jim, Yes I think that the potential variation of final output from the same data set is both one of the joys and one of the difficulties of this hobby. you are always left with the feeling that one more repro could produce the killer image!
PI is really great but iIseem to have hit a bit of a speed bump with it right now as I am really struggling to get decent backgrounds. I started tryng masked stretch and EZ soft stretch and while they seemed to produce good initial stretches I found the backgrounds became really nasty as I moved on. So I've consciously gone back a couple of steps in my progress to try to regroup. I am seriously thinking about getting the Adam Block's tutorial set but I'm not sure I am ready (or able) to put the amount of time into it to justify the cost.
take care
David.
I understand completely. I have also had issues with background. With and without EZ Softstretch. I usually get a much better background extraction with ABE rather than DBE also. Undoubtedly due to my lack of knowledge.
Also, most times my backgrounds have a good bit of color noise (somewhat splotchy). I can make an inverted star mask and somewhat clean the color noise up, but it seems like a messy way to go about it.
I am retired and still think that I would have some trouble putting in the time to go through Adam Block's series. I do think that I will try out the "FastTrack" training video. It is about 3 hours and it most certainly would help.
Processing is both fun and very frustrating to me. Collecting data is my most fun part of it right now. Especially since I started using N.I.N.A.
Even with the processing struggles, your images are really wonderful! Keep it up! Never ending learning!
Jim
Scopes: Explore Scientific ED102 APO, Sharpstar 61 EDPH II APO, Samyang 135 F2 (still on the Nikon).
Mount: Skywatcher HEQ5 Pro with Rowan Belt Mod
Stuff: ASI EAF Focus Motor (x2), ZWO OAG, ZWO 30 mm Guide Scope, ASI 220mm min, ASI 120mm mini, Stellarview 0.8 FR/FF, Sharpstar 0.8 FR/FF, Mele Overloock 3C.
Camera/Filters/Software: ASI 533 mc pro, ASI 120mm mini, ASI 220mm mini , IDAS LPS D-1, Optolong L-Enhance, ZWO UV/IR Cut, N.I.N.A., Green Swamp Server, PHD2, Adobe Photoshop CC, Pixinsight.
Dog and best bud: Jack
Sky: Bortle 6-7
My Astrobin: https://www.astrobin.com/users/Juno16/