Olympus UK E-System User Group
Olympus UK E-System User Group

Join our unique resource for Olympus Four Thirds E-System DSLR and Pen and OM-D Micro Four Thirds photographers. Show your images via our free e-group photo gallery. Please read the e-group.uk.net forum terms and conditions before posting for the first time. Above all, welcome!


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Foto Fair Post your photos for friendly, non-critical feedback. This is the place to show pictures if you aren't yet ready for full-blooded critique, or simply want to share an interesting picture with other e-group visitors.

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  #271  
Old 20th August 2019
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Re: Astro Photos

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Originally Posted by Bikie John View Post
I am no expert on this Mark, but I suspect that warm nights might not be so good due to atmospheric haze. I gather from an astro friend that clear cold nights are best - so get investing in those thermals!

John
Generally speaking for astrophotography cold nights are much better because the sensor temperature will be lower, and its the heat in the sensor that makes the noise generally. The longer you keep the shutter open the worst it gets. I have found with Olympus sensors if you keep the exposure time to 60 secs or less sensor heat noise is less of a problem, above 60secs dark frame subtraction helps.

Atmospheric haze or seeing is another problem there are websites that you can find that tell you what visibility you can expect. I sometimes use https://www.goodtostargaze.com/. But nothing beats having a good look yourself.

So for milky way images with shorter exposures warm night should be ok.
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  #272  
Old 24th August 2019
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Re: Astro Photos

If you use Startools for processing your Astro images you might be interested to know it's just been updated this week. Apparently is a major update so worth a look.
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  #273  
Old 25th August 2019
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Re: Astro Photos

Thanks for heads up on this Dave. It took some searching on the startools forum. Not sure how much of an update this is as still trying to find out whats improved.
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  #274  
Old 25th August 2019
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Re: Astro Photos

The developer posted this on another forum.

https://www.cloudynights.com/topic/6...ls-15-out-now/

He says its 4 years work so pretty major.
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  #275  
Old 27th August 2019
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Re: Astro Photos

First time out with scope for months.
10 x 300sec shots in mono. ( Luminance filter)

Andromeda Galaxy M31

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Last edited by wornish; 27th August 2019 at 03:50 PM. Reason: Changed image
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  #276  
Old 27th August 2019
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Re: Astro Photos

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Originally Posted by wornish View Post
The developer posted this on another forum.

https://www.cloudynights.com/topic/6...ls-15-out-now/

He says its 4 years work so pretty major.
Thanks Dave I did see this on the Startools forum hidden away but I think the major improvements are in the LRGB processing side. I am not at that stage yet so most of my Olympus processing is done much the same in the previous versions. There are some small changes in layout that I like however.
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  #277  
Old 27th August 2019
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Re: Astro Photos

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Originally Posted by wornish View Post
First time out with scope for months.
10 x 300sec shots in mono. ( Luminance filter)

Andromeda Galaxy M31
Good detail in mono are you planning on doing the RGB as well?

We have had 4 or 5 nights of clear skies I am in need of sleep as I have been doing 4hrs + of images per night!
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  #278  
Old 27th August 2019
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Re: Astro Photos

Had some really good clear nights recently.

The Bubble Nebula NGC7635 represents the limit I think for my current set up using the OMD EM1 MKII and RC6 telescope It is a magnitude 10 (dim light) for a f9 telescope. I have taken about 13hrs worth of images using on board NR. I was hoping for more detail of the bubble but I guess that will only come with narrowband imaging.

NGC 7635 is about 10,000 light years away. The star is about four million years old, and in 10 million to 20 million years, it will likely detonate as a supernova. (Wikipedia)

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  #279  
Old 27th August 2019
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Re: Astro Photos

It looks fabulous to me John I can only ogle in awe. What a talented guy you are
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  #280  
Old 27th August 2019
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Re: Astro Photos

John your Bubble Nebula is fantastic. I think Olympus would very pleased to see that image, it just goes to show what a great camera in the right hands can deliver. Your new scope and mount certainly are working well.

I haven't got the stamina to do 13 hours over 4 nights. I have been out for two nights but the first was spoilt by too many clouds, and I packed it in after midnight. Last night I did another couple of hours and got my first Luminance data. I plan on adding R, G, B and Ha in the near future.
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  #281  
Old 28th August 2019
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Re: Astro Photos

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Originally Posted by Phill D View Post
It looks fabulous to me John I can only ogle in awe. What a talented guy you are
Ditto, cannot any better comment. great photo and hard work...
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  #282  
Old 29th August 2019
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Re: Astro Photos

Managed to get a few frames of RGB last night and added them to the Luminance I posted earlier.

Slightly different alignment so top left and bottom right corners clipped off when stars aligned.

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