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Equipment Discussions >> Video and Electronically Assisted Astronomy

Pages: 1
jdbastro
sage


Reged: 08/18/07

Loc: W. Coast
Rosette Nebula Real-Time Video thru IIE
      #5803868 - 04/17/13 02:09 AM Attachment (28 downloads)

Got another video for you. Taken from Mount Pinos over the weekend. Scope is a Takahashi Sky90 at f4.5 with a Gen 3 image intensifier and a 12nm H-alpha filter. Camera is a Panasonic GH3 using Vivid picture mode, manual movie control with shutter speed of 1/10th sec at 3200 ISO. Pardon the weak audio due to wind - blame it on the wind.

Rosette Nebula Real-Time Video Link

Here's a reference still (5 sec exposure):


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Rosette Nebula Real-Time Video thru IIE new [Re: jdbastro]
      #5804001 - 04/17/13 06:47 AM

That is really cool. I especially like that picture. It looks fantastic for 5 seconds.

Have you tried the HDR mode yet? Try 3 stops, for 8 seconds, with ISO 12,800 or 25,600 with Vivid and +5 contrast. It will take an 8 second image, then a 1 second image and then a 1 minute image.

That may blow out everything with the gain the image intensifier gives. If so then just reduce the exposure length down from 8 seconds to 1 second or perhaps .5 seconds.

The HDR will clean up the image by stacking out all of the noise.


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highfnum
Carpal Tunnel
*****

Reged: 09/06/06

Loc: NE USA
Re: Rosette Nebula Real-Time Video thru IIE new [Re: mpgxsvcd]
      #5804035 - 04/17/13 07:37 AM

nice work as usual
a while back I took some rosette wide agle shots with 50mm and 70mm with BIPH
50mm shows other h-alpha gas stuff

http://www.cloudynights.com/photopost/showphoto.php?photo=19707

http://www.cloudynights.com/photopost/showphoto.php?photo=19708


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Moromete
professor emeritus


Reged: 02/15/12

Loc: Romania
Re: Rosette Nebula Real-Time Video thru IIE new [Re: jdbastro]
      #5804085 - 04/17/13 08:16 AM

It's such a pitty that the images are not color but just green.

Very nice processed images but how much does your Gen 3 image intensifier cost and is it available for "mortals" worldwide?


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Rosette Nebula Real-Time Video thru IIE new [Re: Moromete]
      #5804139 - 04/17/13 09:02 AM

I wonder if there is a way to give it false color? There is a mode on the GH3 that will allow you to only show one color. I wonder if that can be utilized into changing the green to Red or purple. Then the sky would be black and white and the object would be closer to its natural color.

It probably won’t work but it is worth a try.


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PEterW
professor emeritus


Reged: 01/02/06

Loc: SW London, UK
Re: Rosette Nebula Real-Time Video thru IIE new [Re: mpgxsvcd]
      #5804623 - 04/17/13 02:07 PM

Green?? Can make it smoother and orange if you pop a suitable filter over it.
PeterW


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jdbastro
sage


Reged: 08/18/07

Loc: W. Coast
Re: Rosette Nebula Real-Time Video thru IIE new [Re: Moromete]
      #5804708 - 04/17/13 02:50 PM

Quote:

It's such a pitty that the images are not color but just green.

Very nice processed images but how much does your Gen 3 image intensifier cost and is it available for "mortals" worldwide?




I have seen a couple demos of color night vision on the web but I think that kind of tech is rare at the moment.

Cost for this grade of Gen 3 intensifier is $2000 to $2700 if purchased new. Can't be exported outside the U.S. due to ITAR restrictions. Lower grade Gen 3 tubes are available for export, but they won't work as well for astro use.


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jdbastro
sage


Reged: 08/18/07

Loc: W. Coast
Re: Rosette Nebula Real-Time Video thru IIE new [Re: highfnum]
      #5804716 - 04/17/13 02:58 PM

Quote:

nice work as usual
a while back I took some rosette wide agle shots with 50mm and 70mm with BIPH
50mm shows other h-alpha gas stuff

http://www.cloudynights.com/photopost/showphoto.php?photo=19707

http://www.cloudynights.com/photopost/showphoto.php?photo=19708




Cool pics. What camera did you use behind your BIPH?


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highfnum
Carpal Tunnel
*****

Reged: 09/06/06

Loc: NE USA
Re: Rosette Nebula Real-Time Video thru IIE new [Re: jdbastro]
      #5804838 - 04/17/13 04:18 PM

canon rebel xt

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nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: Rosette Nebula Real-Time Video thru IIE new [Re: highfnum]
      #5806064 - 04/18/13 03:51 AM

Very nice Rosette via youe EOD

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half meter
Postmaster
*****

Reged: 05/05/04

Loc: Great Lakes
Re: Rosette Nebula Real-Time Video thru IIE new [Re: nytecam]
      #5811978 - 04/20/13 10:32 PM

BTW, green is the correct color for naked eye viewing. Our eyes are most sensitive to green so it helps boost the S/N ratio. Any color phosphor could have been used but green is superior for visual use.

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