Archimedes in the Sea of Showers

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Archimedes in the Sea of Showers

Postby Graeme1858 » Sat Jan 19, 2019 7:30 pm

First clear night for ages and I tried a Moon image with the new GP-Cam290C .

17_12_25Z_Stacked_processed_small.png
17_12_25Z_Stacked_processed_small.png (215.52 KiB) Viewed 516 times


41 frames from a short avi, stacked in Registax, curves and levels played with in Gimp.

Lots of room for improvement there then!
Last edited by Graeme1858 on Sun Jan 20, 2019 8:23 am, edited 1 time in total.
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Celestron CGX 9.25 SCT
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Re: Archimedes in the Sea of Showers

Postby andrewscomputers » Sat Jan 19, 2019 10:04 pm

Hi Graeme I have the 290c camera as well,I try and get the limb in focus and then go for close up shots as I know it will in to focus,if that helps.These cameras are sensitive as they have a Sony chip.I use autostakkert to stack my moon images or Microsoft ice that stitches together and makes good images.
Andy
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Re: Archimedes in the Sea of Showers

Postby Aratus » Sat Jan 19, 2019 10:24 pm

It is not bad for a start. The exposure is spot on. Try focusing on an average brightness star and then use the focusing knob to get it the image of the star as small as possible. Then move over to the moon. Try for 400 - 500 images and chose the best 30%, or less if the atmosphere is unsteady. The mountains will really stand out.
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
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Re: Archimedes in the Sea of Showers

Postby Graeme1858 » Sat Jan 19, 2019 10:53 pm

Cheers

I need to get some practice! I had a 10m usb to a usb hub and it works with the Canon 600D but not the CGX mount or the Altair camera so I had to align with the mount hand controller and an eye piece and then goto slew to the moon and put the 290C in with the laptop next to the mount out of the comfort of the man cave! The short exposure was one I aborted because I didn't put a target name in the file name. The next exposure was starting to veer off towards the end and I tried to realign and the resulting video crashes whilst stacking.

I need to get the alignment spot on before I start to try imaging! And I need to try a shorter usb lead!

Loving it though!

Regards

Graeme
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Miranda 10x50 Binoculars
Celestron CGX 9.25 SCT
Graeme1858
 
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Location: Kent, UK, 51°28’N 0°38’E

Re: Archimedes in the Sea of Showers

Postby andrewscomputers » Sat Jan 19, 2019 11:15 pm

Hi Graeme I use a 10m usb cable and seems to work fine with my 290c.I image with the camera I use a 25mm eyepiece to find the target and then drop to 8mm to get the camera in the right position.Then use my handcontroller to keep it in target,but is quite hard sometimes as it is only a small chip.
Andy
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Re: Archimedes in the Sea of Showers

Postby Graeme1858 » Sun Jan 20, 2019 8:49 am

andrewscomputers wrote:Hi Graeme I use a 10m usb cable and seems to work fine with my 290c.I image with the camera I use a 25mm eyepiece to find the target and then drop to 8mm to get the camera in the right position.Then use my handcontroller to keep it in target,but is quite hard sometimes as it is only a small chip.
Andy


The cable length issue is an assumption on my part because everything works fine without it. My aim is to be able to control and image whilst sitting at the laptop 7m away from the telescope. I use the Celestron PWI software for controlling the mount and it has been fine with an indoors trial run during the day but fails to find the Comm port when using the 10m usb. More practice!!!
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Miranda 10x50 Binoculars
Celestron CGX 9.25 SCT
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Posts: 205
Joined: Tue Jul 24, 2018 2:32 pm
Location: Kent, UK, 51°28’N 0°38’E

Re: Archimedes in the Sea of Showers

Postby Aratus » Sun Jan 20, 2019 10:22 am

The reliable limits for a ordinary USB cable are between 3 and 5 metres. It is possible to get an amplified cable and go much further. I'm not sure if that is what you are using, but if not take a look.

Something like this.

https://www.amazon.co.uk/UGREEN-Extension-Amplification-Keyboards-loudspeakers/dp/B00B2HP3A2/ref=sr_1_3?ie=UTF8&qid=1547975475&sr=8-3&keywords=active+usb+extension+cable

As you already know, getting that alignment correct first will save a lot of frustration in taking multiple frames. Stacking software doesn't like large changes between frames.
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
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Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire

Re: Archimedes in the Sea of Showers

Postby andrewscomputers » Sun Jan 20, 2019 12:10 pm

Hi Graeme I use the same cable that Aratus has mentioned,it works fine on my gpcams.
Andy
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Re: Archimedes in the Sea of Showers

Postby Graeme1858 » Sun Jan 20, 2019 4:50 pm

It's this one:

https://www.ebay.co.uk/itm/10M-USB-Acti ... 2749.l2649

Just doing some indoor, day time fault finding now!
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Miranda 10x50 Binoculars
Celestron CGX 9.25 SCT
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Posts: 205
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Location: Kent, UK, 51°28’N 0°38’E

Re: Archimedes in the Sea of Showers

Postby andrewscomputers » Sun Jan 20, 2019 5:44 pm

Hi Graeme that's is similar,I use the ugreen make,but think will do the same job.If it doesn't work can always send back in eBay.
Andy
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