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First evening with a FRA400

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#1 osbourne one-nil

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Posted 03 August 2021 - 04:03 AM

After much wailing and gnashing of teeth over my ASIair Pro setup, it turned out that simply swapping the power cable sorted any problems I had. Last night, therefore, gave me an opportunity to give my new FRA400/ASI533MC/SXD2 Mount combination its first test. What a nice way to celebrate the return of technical night at my latitude!

 

Now, I know this is objectively rubbish, but I had fun, so I don't really care! However, I would like to learn so why are the stars so big on this shot? Is it the result of an undersampled image? Is it poor tracking (the shot was guided)? Is it my processing or could it just be one of those things?

 

For the record, the shot comprises 10 x 5min exposures, stacked in Deep Sky Stacker, using a gain of 100...whatever that means. 

 

Thanks for any advice!

 

1024 Veil 3.jpg

 


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#2 osbourne one-nil

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Posted 03 August 2021 - 04:03 AM

Here's the unprocessed, stacked image...my starting point I guess?

 

Veil unprocessed.jpg



#3 osbourne one-nil

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Posted 03 August 2021 - 04:05 AM

And finally...doesn't look much like North America to me, but whatever!

 

1500 North American.jpg


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#4 Boeglewatcher

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Posted 03 August 2021 - 06:52 AM

I would assume that you are not masking the bright stars while stretching (enough/at all).

cs Joachim


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#5 osbourne one-nil

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Posted 03 August 2021 - 07:08 AM

Let's go with the "at all" option. I've never really got on with masking in landscape photography but it seems I need to get over that hurdle now!



#6 PhotonHunter1

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Posted 03 August 2021 - 12:39 PM

Another factor could be the 5 min exposures for an LRGB image, which could be over saturating your stars leading to the bloating. These are star rich fields you are imaging.


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