Quick test repaired Quark

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PDB
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Quick test repaired Quark

Post by PDB » Thu Feb 08, 2018 1:23 pm

Quark came back from the US 2 weeks ago.

Cold an cloudy before noon, but suddenly around 12:30 clouds started to break. Still to cold (below 5°C) for the Quark, but decided to do a quick test anyway. Got it on temperature so the heater worked ok. Visually there was a lot of contrast in the image. (Had not seen that for long time).

So grabbed the laptop and the ASI-120 for a quick run, and shot 2 ser files + flat before clouds took over again. Not the best seeing for imaging,and no time to wait for good seeing. Sun 23° up in the sky.

The image is not really sharp, and too heavy processed, but the Quark looks promissing again ...
2018-02-08_T_13-44-52-0581.jpg
2018-02-08_T_13-44-52-0581.jpg (72.92 KiB) Viewed 169 times
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Re: Quick test repaired Quark

Post by marktownley » Thu Feb 08, 2018 2:15 pm

Glad the quark has returned mended! Glad you are getting some sun.
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Re: Quick test repaired Quark

Post by PDB » Thu Feb 08, 2018 2:20 pm

Thanks Mark. In fact I think the old one was beyond repair. Looked like a brand new unit.

P

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Re: Quick test repaired Quark

Post by ffellah » Thu Feb 08, 2018 3:17 pm

The seeing not great but still a valid image, Paul.

The nice part is that you are imaging again....

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Re: Quick test repaired Quark

Post by Montana » Thu Feb 08, 2018 4:34 pm

I'm glad you got one that works, the one they sent me back was an absolute joke ;)
I look forward to sunnier days for you :)
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Re: Quick test repaired Quark

Post by PDB » Thu Feb 08, 2018 4:49 pm

Thanks Franco and Alexandra.
Well, weather forecast for the coming days not good. We did not have many "good" days in December and January, a weather change would be really welcome.

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Re: Quick test repaired Quark

Post by Valery » Thu Feb 08, 2018 7:12 pm

Looks nice! Congratulates with a mended Quark.

BTW Does this image represents a full Quark FOV? Have you applied a flat field to this image?


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Re: Quick test repaired Quark

Post by PDB » Thu Feb 08, 2018 7:56 pm

Hi Valery,

this was with the ASI 120MM but binned 2x to get bigger pixel size and not oversampling at f/25. (7.5 instead of 3.75) Noth resized in post processing but the crop in AS!3 made it a little bit smaller). Conditions were very bad and I had a lot of problems focusing when viewing on the laptop screen. A flat was applied (otherwhise there would have been a big dust donut)

While imaging conditions als deteriorated because of hazy clouds coming in.

Next test will be with a new 120mm/f8.3 (if the Sun ever comes back)

Regards,

Paul

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Re: Quick test repaired Quark

Post by PDB » Thu Feb 08, 2018 8:51 pm

Valery,

i now stacked a version Without flat and without the crop option in AS!3. So this is the full view on the ASI-120MM sensor.
Little bit of L&R an stretch in IMPPG and correct orientation. So this shows some darkening towards the left (but that is also direction of the limb)
And of course a big dust donut.
But flats can take care of this
Noflat.jpg
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Re: Quick test repaired Quark

Post by PDB » Sat Feb 10, 2018 5:29 pm

And here is an image taken today with the 120mm f/8.3 refractor (with Quark at f/35)
Still not really sharp but that is mainly due to:
- seeing conditions
- very bad focuser which I need to replace with something decent (wit 4200 mm focal lengt a good focuser is a must)

ASI 120 MM-S 2x binned against too much oversampling.
C2018-02-10.jpg
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Still some work ahead ...

regards,

Paul

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Re: Quick test repaired Quark

Post by ffellah » Sat Feb 10, 2018 6:30 pm

A nice addition, Paul.

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Re: Quick test repaired Quark

Post by marktownley » Sat Feb 10, 2018 7:23 pm

Yes, good addition, the new quark seems to be a winner.
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Re: Quick test repaired Quark

Post by PDB » Sun Feb 11, 2018 8:25 am

Thanks Franco & Mark.
Still some work to do now on this refractor to get it fixed to the mount in good balance and a decent focuser without breaking the bank. But unfortunatelly "on a budget" and "astronomy" seem to be mutually exclusive. (and I should need to get a camera with an IMX174 sensor for that combination as well. €€€€..)

regards,

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Re: Quick test repaired Quark

Post by Montana » Sun Feb 11, 2018 11:37 am

Very nice pic :bow :hamster: oh how I wish I could get out imaging again!
Alexandra

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