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Equipment Discussions >> Video and Electronically Assisted Astronomy

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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Panasonic GH3 for near real time AP
      #5571855 - 12/15/12 12:41 AM Attachment (79 downloads)

Here are some sample Astro Photographs I took with the GH3. I was able to capture 15 objects in a single night. All of these images were out of the camera jpgs.

http://www.youtube.com/watch?v=UehRwMBEQR4

http://forums.dpreview.com/forums/thread/3351947

Some of these shots were in camera HDR shots. That mode works extremely well if you select the +-2 stop option and then shoot a 15 second ISO 3200 base image. The camera then will combine that image with a 60 second and a 4 second image to give you an image that compresses the scenes dynamic range by 4 stops.

This works very well on Orion's Nebula. However, I would like to find a way to use the bulb function with HDR so that we could use longer shutter durations. Also it would be nice to be able to do RAW HDR shots. The camera already can do unlimited in camera RAW stacking. However, it can't align those shots like the HDR mode does.

Edited by mpgxsvcd (12/15/12 12:53 AM)


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5571858 - 12/15/12 12:42 AM Attachment (103 downloads)

Horse Head

Edited by mpgxsvcd (12/15/12 12:45 AM)


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5571865 - 12/15/12 12:46 AM Attachment (100 downloads)

Horse Head in 30 Seconds. Remember this is an unmodified camera with the stock filter in place.

Edited by mpgxsvcd (12/15/12 12:49 AM)


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5571871 - 12/15/12 12:50 AM Attachment (88 downloads)

Running Man

Edited by mpgxsvcd (12/15/12 12:50 AM)


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5571872 - 12/15/12 12:51 AM Attachment (72 downloads)

The Flame

Edited by mpgxsvcd (12/15/12 12:51 AM)


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5571876 - 12/15/12 12:52 AM Attachment (98 downloads)

M31

Edited by mpgxsvcd (12/15/12 12:52 AM)


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Zoomster
Vendor - Clear Sky Adventures
*****

Reged: 01/30/05

Loc: Tampa FL
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5572004 - 12/15/12 04:39 AM

Very nice work, looks like that series by Panasonic is quite capable, I have the G3 lumix and am still experimenting. I will try your settings soon and see what comes up.

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Dwight J
scholastic sledgehammer
*****

Reged: 05/14/09

Loc: Lethbridge, Alberta, Canada
Re: Panasonic GH3 for near real time AP new [Re: Zoomster]
      #5573398 - 12/15/12 11:09 PM

Travis: have you tried DeepSkyStacker Live? It may allow you to stack and display the "live" image and continue to stack as more images are downloaded. This would entail using a computer to view the resulting image. I know it can stack Canon Raw files but I am not to sure about Panasonic Raw files. It can do jpeg, tiff, bitmap, etc. Best thing it is free so no cost to see if it can help. As it is, the images you are getting are coming along and are very good.

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nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5573587 - 12/16/12 03:36 AM

Excellent series of very clean DSO results Travis from your Panasonic GH3 cam under its own thread I find it very useful to see the cam listed in the thread title and see what other cams, other than the Mallincam, can do.

As this video-like form of imaging is at the extreme edge of cam sensitivity etc info on scope aperture / f/ratio / exposure etc with each image is very useful for guidance - thanks


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: nytecam]
      #5579223 - 12/19/12 04:23 PM Attachment (73 downloads)

I discovered a few more interesting things about the Panasonic GH3. Not only does it do in camera RAW stacking to reduce noise and increase sensitivity. It also has an option to reduce vignetting in camera. You can do the entire stacking process in camera. However, I am mostly to impatient to do any stacking at all so I shoot mostly single exposure or HDR images.

The HDR mode works wonderfully for Orion. Is there anything else that can take the picture below in camera?

If you really want to know about the other semi live view camera options you really should try to see what the GH3 can do.

It is so wonderful to be able to shoot my everyday pictures and videos with high quality lenses and then be able to use the same camera for near real time AP at night. The wireless streaming, playback, and transfer is simply unmatched by any other camera.

It was so nice to be able to go out last night and not pick just one object to concentrate on. It didnít matter what size or how dark it was. I could just point my scope at it and in less than 2 minutes I had a near real time picture that met my expectations.

Also some people downplay the benefits of not needing a PC or the connections that go with it. I hate cable clutter and I really donít want to deal with powering the PC for the 7 hours I was out last night. Much less bringing a table out to sit it on.

If you are truly interested in learning what other options are out there I would be glad to answer any questions about the camera.

This is an out of camera JPG. No editing except to resize to meet CN requirements. It looks exactly like this on the LCD display or on an external monitor.

Edited by mpgxsvcd (12/19/12 04:32 PM)


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5579233 - 12/19/12 04:33 PM Attachment (95 downloads)

Here is what it looks like when you don't use the HDR mode.

Edited by mpgxsvcd (12/19/12 04:34 PM)


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5579242 - 12/19/12 04:39 PM Attachment (84 downloads)

Horse Head in 2 minutes ISO 6400

Edited by mpgxsvcd (12/19/12 04:39 PM)


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5579244 - 12/19/12 04:39 PM Attachment (77 downloads)

M81 and M82

Edited by mpgxsvcd (12/19/12 04:40 PM)


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5579246 - 12/19/12 04:40 PM Attachment (62 downloads)

M31 oriented better than before.

Edited by mpgxsvcd (12/19/12 04:40 PM)


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5579248 - 12/19/12 04:41 PM Attachment (67 downloads)

M33 with a plane through it. Couldn't they have picked any other space to fly through at that moment?

Edited by mpgxsvcd (12/19/12 04:42 PM)


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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5579250 - 12/19/12 04:42 PM Attachment (72 downloads)

And our moon

Edited by mpgxsvcd (12/19/12 04:42 PM)


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StarmanDan
Post Laureate
*****

Reged: 08/27/07

Loc: Deep in the heart of Texas
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5579797 - 12/19/12 10:50 PM

Very nice! I may just consider this camera to replace my aging 350D.

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mattflastro
Vendor - Astrovideo Systems


Reged: 07/31/09

Loc: Brevard County , FL
Re: Panasonic GH3 for near real time AP new [Re: StarmanDan]
      #5580077 - 12/20/12 04:53 AM

I asked you in your first "hypothetical" thread and got no answer so I'm doing it again here, please tell more about the wireless streaming and all the wondrous wireless capabilities of this camera . I too hate cable clutter but at this point you seem to have a great head start in eliminating it . Do you have some pics of your setup?

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mpgxsvcd
Carpal Tunnel


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Panasonic GH3 for near real time AP new [Re: mattflastro]
      #5580342 - 12/20/12 10:06 AM

Quote:

I asked you in your first "hypothetical" thread and got no answer so I'm doing it again here, please tell more about the wireless streaming and all the wondrous wireless capabilities of this camera . I too hate cable clutter but at this point you seem to have a great head start in eliminating it . Do you have some pics of your setup?




Sorry I didnít see your original request in the other thread. This is how wireless works with my GH3 and Celestron CG-5 mount.

1. The GH3 generates its own wireless network. You can connect to that network from any device with wireless capabilities. However, the only way to control it right now is through either an Android or Apple app.

2. Once you connect to the GH3 you can bring up the app and it will show you exactly what the LCD displays. This isnít precisely real-time. However, it is essentially real-time. I have held the phone up next to the cameraís LCD and the difference in time for the video is less than the time it takes for you to move your eyes from one device to the other. Probably less than 60 Frames of delay(1 second). It is so much better than the GoPro App. That has some serious lag in the display.

3. I can control almost everything about the camera with the phone. I can control Shutter Speed, Aperture(For m4/3s lenses), ISO, White Balance, Lossless 10x Crop mode for Focusing, RAW vs. JPG, Image Resolution, and Color Mode(Including Sharpness, Contrast, Color, and Noise reduction).

4. The only things I canít control are that I canít turn on the fully electronic shutter or the HDR mode directly from the phone. However, I can set it up so that the when I shoot RAW+JPG it does not do HDR and when I switch to JPG only it will automatically switch to the HDR mode. Then I can control that from the phone.

5. I also have the wireless remote($150) for my CG-5 mount. That allows me to completely control my mount from my sonís itouch. It doesnít work with Android yet. However, I need two separate devices to control it so that doesnít really matter.

6. With both of those devices I can align objects, correct the exposure, take pictures, and review those images.

For me the biggest benefit is that I only have 2 cables on my entire setup. One Cable goes from my mount to my battery pack and the other cable goes from my scope to the battery pack for my dew fan. Where I live it is so humid that I have to run the fan year round.

There are a few drawbacks to the current wireless setup. I canít review or see video from the camera on the phone. That is because the camera records at a minimum of 22 mb/sec and that could never be streamed. That isnít a big deal though. Recording video is not useful for Deep space objects.

Also my live view is limited to no more than 2 seconds of shutter duration while viewing on the phone. Now that doesnít mean that I canít record an image with greater than 2 seconds exposure. I can actually go all the way to 60 seconds which is plenty when you can use ISO 6400 or even ISO 12,800 in some situations. It is just that I can go to 8 seconds when I am using the cameraís LCD for live view instead of the phone. They might change this with a firmware or app update though.

Edited by mpgxsvcd (12/20/12 10:08 AM)


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mattflastro
Vendor - Astrovideo Systems


Reged: 07/31/09

Loc: Brevard County , FL
Re: Panasonic GH3 for near real time AP new [Re: mpgxsvcd]
      #5580861 - 12/20/12 02:59 PM

Travis, thanks for sharing the details of your wireless setup. It sounds great.
There are a few details I didn't understand exactly though .
When you say the camera creates its own network, what does it mean?
Is it connecting via Bluetooth or Wifi (802.11 of some type b/g/n ) ?
Does it need an acces point or is it an ad-hoc connection (peer to peer)?
What form of security if any does this link offer WEP , WPA , WPA2 ?
How do you set up the camera network configuration, is there a cam menu or is it thru a computer connection ?
Did the camera ever refuse to connect to your wireless device or forget the settings ?
Beside the x10 live view crop mode, how do you focus ? Is there any possibility to control a Robofocus type of device , or a temperature compensated focuser from your wireless tablet/phone ?
Are there any limits on the shutter operation , such as max duration of shutter open?
How long does the battery last , and if not all night, can it take a grip with 2 batteries or external power ?
How is the real image noise ? In these reduced images it's impossible to see , please could you post a cropped unprocessed small black area with just the sky black background and a few low magnitude but properly exposed stars ?
Are there any software tools to assist with scope polar alignment , collimation or complete system collimation thru the wireless link ?
Does the camera have in camera image stabilisation , or in lens ? This question is unrelated to any existing application but is something I would need for something of my own.
Oops, my questions list is longer than I thought . If there are Android or iphone apps that answer my above questions that would be a great plus for this camera to have a simple clutterless setup with great potential .


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