Wow! I'm kind of overwhelmed. Did not expect this kind of response. Thank you, everyone.
From what i am seeing here, i would say ... Pretty darn good, especially for first success !!
Really, I'm pretty proud of it. Knowing (intimately) what it took to get the image, I actually feel fortunate.
I’ll let some of the real experts here process your stack but 2 things jump out at me immediately ...
1. You need to get in the habit of taking cal frames EVERY time you image right now. Darks and bias can be taken at any time and build a library. Only flats need to be taken after a session and that should only take about 5 mins. And. If you’re not dithering - start. For most capture. S/w its just a check of a box and use the defaults until you know why you should change them.
2. 24 subs is not much data. Total integration time trumps everything. I don’t start any real processing until I have 3-5 hrs on a target ...
nice first image BTW!
Not taking cal frames is a bad habit, I know. It's not like I didn't know that at the time. Silly of me. Thanks for the advice on acquiring darks and bias. I was unaware that darks didn't have to mimic the imaging environment. I will certainly get that done.
Yes very nice start!
If you post a picture here under 500k in jpeg. I can check a few things out for you in PixInsight real quick. Your zip file was giving me fits and wouldn't down under 20 mins. I think too much green? Maybe giving you the brownish tint and covering your red nebula in M33. Also I can pull the image hard quickly and see if more data/color is there. Of course I could be wrong and I could tell with the jpeg image.
For fun while testing a newly wired up usb and power setup I did a 60% moon, in cloudy hazy night and got this with my old T3i modified Canon. Your DSLR is nicer so it may be as stated by those before me. Flats, bias, and darks are a must.
Here is the image I did on a really bad night and details. I kept the images at 90 seconds each because of the clouds the seeing was horrible that night also.
Download size was a little unreasonable. Your M33 shot is really nice. Certainly for not so good seeing. My shot had almost perfect conditions.
Nice image...I'll give it a shot. PM me with a download location like Google Drive or something similar. I'll be using PixInsight and I'll be happy to share my workflow with you.
Thanks Steve. I send a PM. It's a big file. Sorry.
I took a shot at it. ****, that's an enormous sensor you've got! I have a fairly fast computer, and it took 42 minutes just to do the integration portion of the stacking! Suggestion: post the stacked FITS file, rather than the individual frames.
You absolutely MUST take darks, flats and bias frames!! The image is very noisy and has wicked vignetting. Darks and flats will go a long way to fixing those issues. Without the calibration frames, I was forced to make the dark pixels (i.e. the background) much darker than I like to hide the noise and bright corners. And that is after I had cropped the image a lot.
You have coma, but you also have a sensor alignment problem. The stars on the right side are much worse than those on the left side.
Anyway, here's what I got:
Ha! So I picked up the Nikon D5300 used from B&H for about $350. My research showed the D5XXX series camera use the same Sony sensor as used in several higher end Nikons and some dedicated imaging cameras. It's supposed to have a good quality sensor. Yes, it's big. some where around 6000 x 4000 pix.
I've been thoroughly chastised for not taking calibration frames. It will not happen again.
Hmmm. Sensor alignment. I'll have to investigate that. Could it be collimation?
Very nice image. I like the coloration. Soft. Less red bias. Much cleaner background. Makes me want to reprocess and experiment with the coloring.
Here is what I did with Star Tools 1.3 and I have also attached the ST log. Thanks for the share.
Awesome. Very nice image. I think the theme for for M33 is to push the blue a bit. I wonder the reasoning for that. I really did not deviate a lot from the original color presentation. Probably pushed the red a bit.
Thanks so much for the log. I have watched a many videos on processing with StarTools, some are little hard to follow. I will study your log thoroughly and see if I can replicate your process. I think that will teach me a lot.
You're off to a great start! Get into the habit of using the full set of calibration frames and you'll love the results.
Nice processing job @kathyastro!
It's a _whole_ lot less to ask if you upload the stack, rather than the individual frames. That's the common approach here.
Heard. I will be a little more kind to people's bandwidth.
Thank's everyone! CN is the bomb! Thursday night is looking good up here. Temp going to be in the teens. Going to put together a plan. Maybe Pleiades...