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My first successful imaging session

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#1 nighthoek

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Posted 04 March 2021 - 09:24 AM

After 3 attempts, I finally got some useful images.  Here's a cropped image of M42.  It's a stack of 20x30s and 30x10s images, taken with an astromodified Canon 60D, 28-200mm zoom at 200mm-f/5.6, with an Optolong L-Enhance Filter, mounted on a HEQ5-Pro, unguided.  The focus and my polar alignment need to be better.  Darks were added but no flats or bias.  Clearly I need more data and have to learn more post-processing.  Images were stacked in DSS and processed in GIMP.  

Attached Thumbnails

  • combined stack edited.jpg

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#2 jpflood

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Posted 04 March 2021 - 09:38 AM

Go Wayne !!


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#3 Stellar1

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Posted 04 March 2021 - 09:58 AM

It's M42 clear as day, can only get better with every session, nice work!


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#4 Benschop

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Posted 04 March 2021 - 06:40 PM

Great start!! Congrats on the first astro-image


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#5 asanmax

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Posted 04 March 2021 - 10:53 PM

Congrats! That's a good start!

Depending on your light pollution level, you may even try to shoot this nebula without the L-eNhance filter. I'd say, if you are lower than Bortle 6.

There is some "normal" light in it, so you will get a bit more blues/whites.

 

Your camera/filter combination will also work great on the Rosette Nebula, give it a try. It's pretty bright for a modified camera, I think you'll like the result.

 

Also, something tells me there is more data in your image. Would you mind posting the stacked image?


Edited by asanmax, 04 March 2021 - 10:54 PM.

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#6 nighthoek

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Posted 06 March 2021 - 05:44 PM

Here's a link to the image from DSS with no stretching.  I'd love to see what you can pull out out of it asanmax!  

 

https://drive.google...iew?usp=sharing



#7 asanmax

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Posted 06 March 2021 - 06:32 PM

Here's a link to the image from DSS with no stretching.  I'd love to see what you can pull out out of it asanmax!  

 

https://drive.google...iew?usp=sharing

Can't access the file, you may need to share it with everyone.



#8 the Elf

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Posted 07 March 2021 - 03:46 AM

Same for me, the link is not public. I send you a request.



#9 the Elf

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Posted 08 March 2021 - 12:58 PM

OK, here is my humble attempt:

 

combined stack.jpg

 

If you put the question what you can do better my first suggestion is to think about better optics. Take a look at the askar FMA180. I have tested quite some stuff in the short focal lengths from a Eur 50 80mm prime lens from China thru the 50 years old Super Takumar 200mm that I got on ebay for Eur 50. Finally I ended up using the askar with a Baader Semi-APO filter. Here is a review:

https://www.elf-of-l...Art_FMA180.html

I'd say the Takumar is worse than the askar but it is probably better than your zoom lens. Not that your lens is bad, it is zooms are not well suited for astro photography. If you get a 200mm Takumar it would be an improvement.

 

clear skies

the Elf


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#10 the Elf

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Posted 08 March 2021 - 01:09 PM

PS: you are in the beginner dilemma. Processing is difficult enough, you would want to do your first step with good data, that is simple to process data. After a while you will see it is not that difficult. Your first ever image has some room for improvement that makes processing very tricky. It will take years until you can return to your early data and get out some decent results. Here is my story btw:

https://www.elf-of-l...rt_FirstAP.html

If you want to play with data that is easy to process you can download it from my website:

https://www.elf-of-l.../Downloads.html

There is a link to the data and a link to the final result. Once you figure out how to deal with it in general you can return to your own data and apply what you have learned. This will give you some understanding how the data differs and that leads to what you might want to improve. Just a suggestion. Not saying this is the only way to go.

I recommend Nico Carver's GIMP tutorials an YT.


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#11 Hypoxic

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Posted 08 March 2021 - 02:15 PM

Welcome to level one of the rabbit hole. smile.png

Looking forward to your future projects!


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#12 nighthoek

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Posted 08 March 2021 - 03:56 PM

Here's a fixed link.  https://drive.google...iew?usp=sharing

 

Thank you!


Edited by nighthoek, 08 March 2021 - 03:59 PM.

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#13 asanmax

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Posted 08 March 2021 - 06:53 PM

A couple of levels/curves iterations bring up bit more data. Just need more integration time.

Capturem42.JPG


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#14 the Elf

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Posted 09 March 2021 - 01:08 AM

Yea, think of an hour or two. I think you don't need the 10sec subs. I took 2 min subs at ISO 400 at f/6.5 and the core was not saturated.

As you probably know there is the running man nebula next to the Orion nebula. The L-enhance pretty much blocks it. I took the same image with and without the Baader UHC filter and liked the version without filter better because the running man showed up. I don't know how bad your light pollution is. You might take a few test shots and see if it works.


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#15 nighthoek

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Posted 09 March 2021 - 08:33 AM

I'm about 15 miles west of New York City, I can't go very long without a filter in my Bortle 8/9 skies.



#16 the Elf

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Posted 09 March 2021 - 12:23 PM

That sucks. If you want to image from that place you might find yourself using a mono camera and narrowband filters one fine day. You could try to find a less polluted place nearby or take weekend trips to a dark spot. Under Bortle 8 or 9 the filter is very likely your only option.


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#17 asanmax

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Posted 09 March 2021 - 01:10 PM

Yeah, that is not the perfect place. But it's doable. I image from the city in a Bortle class 8 zone. The maximum exposure I can do without filters is around 60-90 seconds at ISO 800. The images look washed out with a lot of light pollution noise in them. I don't even think of the 1/3 histogram rule. But it's the stacking process that brings all the detail up.

You can just try and do some 20-30 60sec exposures and stack them. It's a trial and error method but you will see if it's worth it at all.




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