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Equipment Discussions >> Electronically Assisted Astronomy

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Hemmi
sage


Reged: 09/08/10

Loc: Raleigh, NC
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: nytecam]
      #5296148 - 06/30/12 10:29 AM

Quote:

Well done Hemmi for 1st DSO pics - looks very promising and manual shutter afterall say Scout

Did a quick test of your [boosted] M20 against Megastar and its down to mag 12.6 and pretty clean from hot pixels - M21 OC top left




Not bad for 1 sec, but the images seem to be really grainy. Need more testing to see if that can be cleared up. I never got anywhere near x1024 with the moon out..anything over 1 sec was a total wash. But the amount of light this thing pulled in a such short exposures was excellent. I'm gonna postpone judgement on this camera till I can test it more. The graininess is my real concern at the momment.


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mclewis1
Thread Killer
*****

Reged: 02/25/06

Loc: New Brunswick, Canada
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: Hemmi]
      #5296160 - 06/30/12 10:40 AM

For around a second and with a UHC filter that is indeed impressive sensitivity ... but with that much noise ... yikes. As Maurice pointed out though they are quite smooth over all and without nasty hot pixels and such the images will very likely benefit greatly from stacking and a DIY cooling kit.

How fast is your scope setup?


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Hemmi
sage


Reged: 09/08/10

Loc: Raleigh, NC
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: Hemmi]
      #5296162 - 06/30/12 10:41 AM

one last note...I saw no difference with 3d-dnr all the way up and off, which leads me to believe it was not working. Maybe there is a setting that is preventing it from working correctly, or its just not good enough...More testing is required to be certain.

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Hemmi
sage


Reged: 09/08/10

Loc: Raleigh, NC
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: mclewis1]
      #5296165 - 06/30/12 10:42 AM

Quote:

For around a second and with a UHC filter that is indeed impressive sensitivity ... but with that much noise ... yikes. As Maurice pointed out though they are quite smooth over all and without nasty hot pixels and such the images will very likely benefit greatly from stacking and a DIY cooling kit.

How fast is your scope setup?




F6 ED with a .5 reducer...so ~f3


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Hemmi
sage


Reged: 09/08/10

Loc: Raleigh, NC
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: Hemmi]
      #5296294 - 06/30/12 12:26 PM

Playing around with the camera this morning, I discovered that if you set the exposure mode to WDR you get much less grain. I turned WDR to max and 3d-DNR to max. With the cam cover on, I could crank it up to 1024 acg high, and the noise level was not very bad. I will need to test this under the stars, but maybe this will be much better.

Also got wireless rs-485 working with the OSD. So that will help speed the testing.


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James Cunningham
Post Laureate
*****

Reged: 08/07/10

Loc: Maryland
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: Hemmi]
      #5296311 - 06/30/12 12:41 PM

What is the wireless rs-485 thing?

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Raginar
Postmaster
*****

Reged: 10/19/10

Loc: Rapid CIty, SD
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: James Cunningham]
      #5296323 - 06/30/12 12:52 PM

Hemmi,

Do you have any pictures from last night with the new-better settings?


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jambi99
sage


Reged: 08/14/10

Loc: Québec, Canada
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: Raginar]
      #5296373 - 06/30/12 01:29 PM

Sounds good! Thank Hemmi and Scout.

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Hemmi
sage


Reged: 09/08/10

Loc: Raleigh, NC
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: Raginar]
      #5296392 - 06/30/12 01:50 PM

Quote:

Hemmi,


Do you have any pictures from last night with the new-better settings?




No and it won't be for a few days at least. 108 degrees here today


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Raginar
Postmaster
*****

Reged: 10/19/10

Loc: Rapid CIty, SD
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: Hemmi]
      #5296477 - 06/30/12 02:46 PM

Yikes

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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: Hemmi]
      #5296730 - 06/30/12 06:10 PM

Quote:

Quote:

Was this at 17 seconds? It could use some cooling.




Swan was less than one sec. the trifid was slightly over one sec.




That is amazing. Great job with these. I can vouch for the conditions as well. Seeing and Transparency were terrible last night with the moon out as well.

Pretty much the worst conditions I have ever tried to observe in.

Based on those shots I would say this thing could be really good. Less than 1 sec is very fast for those objects to show up at all.

What monitor are you using with it?


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Hemmi
sage


Reged: 09/08/10

Loc: Raleigh, NC
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: mpgxsvcd]
      #5296808 - 06/30/12 07:08 PM

I use a netbook for viewing

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scout72
Pooh-Bah
*****

Reged: 05/12/08

Loc: SF Bay Area
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: Hemmi]
      #5296863 - 06/30/12 07:51 PM

I was out for a bit last night with this cam as well- went straight for m51 as I am fairly familiar with what the sdc-435/scb-2000 looks like with same scope at 10 seconds (PAL) c-8 at f3.8ish- and it is a pretty difficult object- even without poor seeing and bright moon :-) Anyway- my impressions were :too noisy!!

Also- I still have the stock filter on camera- but can confirm it is NOT true ICR/mechanical which is a bummer.

I tried many different setting - at 20 seconds it was almost completely washed out in noise- I didn't try WDR but will get there too- anyway- I could tell that the signal/data was there- the spiral arm structure and companion were there- just not useable- I tried all of the gain settings and tried dialing back the exposure and it was either too much noise or not enough exposure. I plan on testing additional settings and possibly other filters if I get my stock one off tonight.

I was able to cut back the noise a bit with the brightness control dialed back but could't get a real good result yet- ie less noise but still enough detail.

The menus are pretty funky on this one- you have to go through a kind of reset any time you make changes to the settings to save them.


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Hemmi
sage


Reged: 09/08/10

Loc: Raleigh, NC
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 new [Re: scout72]
      #5297006 - 06/30/12 09:47 PM

I agree with the noise. If we cant figure out how to dial it back, then the camera will not be very good for live viewing. When I get time I will attempt to use it with with a live stacking program to see if stacking will reduce the noise.

What we need is Samsung to release a camera with this chip, as it seems Samsung has the best noise canceling out there.

I still have alot of testing to do, and still think that there may be more that can be done for the noise. I still want to try WDR and also with the the AGC settings.


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Dragon Man
Carpal Tunnel
*****

Reged: 03/07/06

Loc: Snake Valley, Australia
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 [Re: Hemmi]
      #5299027 - 07/02/12 08:27 AM

Thanks for the results so far Lee

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James Cunningham
Post Laureate
*****

Reged: 08/07/10

Loc: Maryland
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 [Re: scout72]
      #5300231 - 07/03/12 07:30 AM

How long did it take for you to get your camera? I ordered mine on 6/26 and it looks like its still in Hong Kong.

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jambi99
sage


Reged: 08/14/10

Loc: Québec, Canada
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 [Re: James Cunningham]
      #5300479 - 07/03/12 11:09 AM

Mine too. Its seems that aliexpress tracking system is not very reliable.They gave me a tracking number but it does not provide me any details other than it was shipped from Hong Kong.

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Hemmi
sage


Reged: 09/08/10

Loc: Raleigh, NC
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 [Re: jambi99]
      #5300944 - 07/03/12 04:58 PM

I paid extra for DHL express. If you used free shipping, expect it in a month.

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Hemmi
sage


Reged: 09/08/10

Loc: Raleigh, NC
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 [Re: Hemmi]
      #5300954 - 07/03/12 05:10 PM

There happens to be 1/32 space under the sensor on my camera, so I made a cold finger out of aluminum to cool the sensor. The cold finger is installed but waiting on a peltier and heatsink.

I just want to see if I can clean up some of this noise.

I will update if and when I get a chance to complete it.


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James Cunningham
Post Laureate
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Reged: 08/07/10

Loc: Maryland
Re: 17 sec (x1024) Camera Sony 960h Exview HAD CCD2 [Re: Hemmi]
      #5300961 - 07/03/12 05:14 PM

All the noise that is on the image - did that come right away or after exposing for a while?

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