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 Post Posted: Mon May 22, 2017 3:06 pm 
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Joined: Mon May 22, 2017 2:56 pm
Posts: 4
Good morning
I have the ASI224MC camera and I have been struggling to get a reasonable image from it. I am using SharpCap for camera control and I have downloaded the latest drivers. When I use the all sky lens under DirectShow the image is about 90% black and I can see some lighter areas where there was a bright area. When I use the all sky lens under SharpCap the image is washed out and extremely grainy. I have never been able to get what I would consider a crisp image with the camera. I have been able to use my Canon camera and I can get some quality images with it so I know that the telescope is not the issue.

Any suggestions or advice would be appreciated
Robin in Canada


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 Post Posted: Thu May 25, 2017 8:28 am 
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Joined: Thu Feb 21, 2013 2:51 am
Posts: 2170
224 is one planetary imaging camera
you need to take one video, stack and processing
then you can get one nice image

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 Post Posted: Thu May 25, 2017 9:27 am 
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Joined: Mon Aug 01, 2016 3:51 pm
Posts: 96
What exposure and gain settings are you using ?
Have you tried it in daylight ?


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 Post Posted: Sat May 27, 2017 12:05 pm 
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Joined: Thu Aug 18, 2016 3:01 pm
Posts: 11
Attached is a sample of what I seem to get for image quality using an 8" SCT with NO barlow lens so I am shooting at f/10 so this should theoretically give the best image quality.
Attachment:
22_47_02.jpg
22_47_02.jpg [ 3.44 KiB | Viewed 712 times ]
This is typical of all of my attempts to image Jupiter. I have tried various settings with no improvement in image quality.

The settings for this image are as follows
[ZWO ASI224MC]
Pan=604
Tilt=248
Output Format=AVI files (*.avi)
Binning=1
Capture Area=320x240
Colour Space=RGB24
Temperature=16.8
Hardware Binning=Off
High Speed Mode=Off
Turbo USB=40
Flip=None
Frame Rate Limit=Maximum
Gain=294
Exposure=0.004976
Timestamp Frames=Off
White Bal (B)=95
White Bal (R)=52
Brightness=101
Gamma=51
Auto Exp Max Gain=300
Auto Exp Max Exp=30
Auto Exp Max Brightness=100
Mono Bin=Off
Subtract Dark=None
Display Brightness=1
Display Contrast=1
Display Gamma=1


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 Post Posted: Sat May 27, 2017 12:30 pm 
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Posts: 96
This looks like typical image after stacking.
How long video and how many frames ?
Did you stack it with Autostakkert ? Did you use Registax and wavelets ?


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 Post Posted: Sat May 27, 2017 12:58 pm 
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Posts: 4
I used Registax and there were 23885 frames. I did not apply any wavelets however Registax only used 4 align points. You mentioned that this is a typical result after stacking. I was expecting a far crisper image in both the avi file as well as the stacked image before applying wavelets. Using Autostakert I get pretty much the same results. I even ran the avi through PPIP first to eliminate the bad frames and then stack. When I see the resultant stacked image I just give up as it of such low quality.
Looking at the results other people are getting it seems that mine are pretty poor. I have been able to image Jupiter using a Canon T5i with far better results


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 Post Posted: Sat May 27, 2017 4:49 pm 
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Posts: 96
23885 frames ! Wov, that must have taken some time to process.
Usually the time frame for Jupiter video is max 3 to 4 minutes before Jupiter's rotation starts to smear thing (you can extent this time with derotate feature in WinJupos software - but that's another story.
Also usually it's good to stack only about 30 to 50% of the frames in order to discard the worst frames.

Last, it really is the wavelets that brings the detail.
As example I made some crude wavelets (not good as it's only from your jpg to work with).


Attachments:
jupiter_22_47_02.jpg
jupiter_22_47_02.jpg [ 5.65 KiB | Viewed 696 times ]
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 Post Posted: Sat May 27, 2017 4:59 pm 
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Joined: Mon May 22, 2017 2:56 pm
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So it appears that I have some learning on Registax's wavelets. When I played around with them there was no apparent cange to the image. Obviously I am a total beginner with Registax

So it appears that the camera is working correctly as this is what I was concerned about

Thanks for your help. I am going to a dark site with a number of astronomers tonight and I will take my camera and see what I can get
Robin


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 Post Posted: Mon May 29, 2017 9:37 pm 
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Attachment:
Final Image 2.jpg
Final Image 2.jpg [ 30.47 KiB | Viewed 674 times ]
i started playing with Registax wavelets and I managed to get this image. Far from perfect but it is a good start
Robin


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 Post Posted: Tue May 30, 2017 5:25 pm 
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Joined: Mon May 11, 2015 5:24 pm
Posts: 35
Robby, First off put the gain down to zero and raise exposure. Run at full resolution or 640x 480 if you need more frame rate. Also you should be using a UV/IR blocking filter which will improve sharpness. And most of all seeing is the most crucial element which you have very little control over and that's where higher frame rates come in which you can obtain with USB 3 and running gain as low as possible without sacrificing frame rate.

Don


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