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INDI Library v1.9.8 Released (29 Sep 2022)

Bi-monthly INDI Library released with new drivers and bug fixes.

M 62

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M 62 was created by Mohamed

I was able to get only 1 sub/picture in between broken layers, so please let me know how good this image is

1 light
30 Darks
30 BIAS
ISO800

Clear Skies!
Mohamed

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2 years 2 months ago #56576
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Replied by Jon Carleton on topic M 62

Focus looks good. You might get a bit more detail if you had more subs, but fortunately, globular clusters are fairly bright, so getting a good image with 1 sub is possible.

I'd have to be obnoxiously picky to criticize, but if I must, a couple of the stars have a bit of jiggle (or possibly edge issues) and the center of the cluster is ever-so-slightly washed out. A "normal" person would say it is a very good image. I prefer to be normal.
SkyWatcher 10" SynScan Goto Dobsonian, SV106 Guide, ZWO ASI178MC, Svbony SV105, SV305, Pi3HQcam, Pi4, DIY WaveShare focuser, Linux Ubuntu, KStars/Ekos, Carte du Ciel/CCDCiel, AstroDMx_Capture, Siril, StarTools, GIMP
Last edit: 2 years 2 months ago by Jon Carleton.
2 years 2 months ago #56639

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Replied by Mohamed on topic M 62

Thanks Jon. What do you think the cause of center joggling and washout? focus, guiding or post processing...
Clear Skies!
Mohamed

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2 years 2 months ago #56653

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Replied by Jose Corazon on topic M 62

I still think it is the instability of your deck. It will amplify the slightest shaking from wind or someone walking in the house.
Washout means too long exposure. If you want stars, not faint nebulosity, you don't need 800 ISO (how long was the exposure?). Try again with 100 or 200 ISO.
Jo
Atlas Pro AZ-EQ, ASI1600MM-Pro, ASI120MM-S, ES102ED, WO-Z61, Nikon D3300, ASI-EFW, ZWO LRGB,Ha,O3,S2 filter set
2 years 2 months ago #56657

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Replied by Mohamed on topic Re:M 62


This one was for 180 seconds ISO 800


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Mohamed
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Mohamed

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2 years 2 months ago #56658

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Replied by maxthebuilder on topic M 62

It's very good for one sub. If you had many more it would be much better.
Do you have a field-flattener?
Max S.

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2 years 2 months ago #56662

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Replied by alacant on topic M 62

Hi

Nice shot
Unfortunately, you lost data by clipping the histogram off left. My guess would be that you lost a lot of stars around the cluster in so doing.
Best to leave all the histogram visible. Control the background by taking more frames and stacking them rather than making it black.

HTH and clear skies,
Steve
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2 years 2 months ago #56665
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Replied by Mohamed on topic Re:M 62


I only have Celestron focal reducer f/6.3


Thank you
Mohamed
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Mohamed

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C9.25 f/10, HEQ5, MyFocuserPro2, OAG, ASI174MC guide, ASI533MC Pro

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2 years 2 months ago #56668

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Replied by Jon Carleton on topic Re:M 62

I think what I am seeing regarding the stars is vibration or wind, rather than focus. Only once cure. Don't shoot with vibration or wind :)

The washout could be post-processing. I'd have to see the original image to make a better guess.
SkyWatcher 10" SynScan Goto Dobsonian, SV106 Guide, ZWO ASI178MC, Svbony SV105, SV305, Pi3HQcam, Pi4, DIY WaveShare focuser, Linux Ubuntu, KStars/Ekos, Carte du Ciel/CCDCiel, AstroDMx_Capture, Siril, StarTools, GIMP
2 years 2 months ago #56682

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Replied by Jose Corazon on topic Re:M 62

Concur with the vibration. A wooden deck with a long focal length is a problem.

The stars in a cluster will wash out and lose color when shot at 180s and 800 ISO. That is an exposure appropriate for a medium intensity nebula, not for stars, especially at f/6.3. Too much light
Atlas Pro AZ-EQ, ASI1600MM-Pro, ASI120MM-S, ES102ED, WO-Z61, Nikon D3300, ASI-EFW, ZWO LRGB,Ha,O3,S2 filter set
2 years 2 months ago #56683

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Replied by Mohamed on topic Re:M 62


What do you recommend as setting when shooting bright objects as stars?


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Mohamed
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Mohamed

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C9.25 f/10, HEQ5, MyFocuserPro2, OAG, ASI174MC guide, ASI533MC Pro

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2 years 2 months ago #56684

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Replied by Mohamed on topic Re:M 62


Hi Jon

You can download the raw CR2 from the following link
www.dropbox.com/s/6m4mod8chm5fa6q/M_62_L...2-43-55_001.zip?dl=0
Clear Skies!
Mohamed

Permanent
C9.25 f/10, HEQ5, MyFocuserPro2, OAG, ASI174MC guide, ASI533MC Pro

Portable
WO Z61, iOptron SmartEQ Pro+, MyFocuserPro2, OAG, ASI120MM guide, ASI183MM Pro, EFW
2 years 2 months ago #56686

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