Atik Cameras

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91
Atik One / Re: Atik 414 EX mono does not focus
« Last post by PESCOPE on November 05, 2021, 06:09:47 PM »
Thanks Crooro will try that
Louw
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Atik Horizon / Re: Horizon monochrome and C-14 Hyperstar
« Last post by Altouch on November 04, 2021, 07:52:50 PM »
Can I make the flat frame actually show up in the forum?  Let’s try one more time.
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Atik Horizon / Re: Horizon monochrome and C-14 Hyperstar
« Last post by Altouch on October 31, 2021, 10:53:44 PM »
Image didn’t appear to make it. Did find the fix for saturation at 4095. Apparently for the Horizon one must check the pad box to pad it out to 16 bit.
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Atik Horizon / Re: Horizon monochrome and C-14 Hyperstar
« Last post by Altouch on October 31, 2021, 10:33:48 PM »
I was able to take flats that look about right. I have attached one. Dusk worked well.  If I run too long an exposure the top end saturates - but well before 65535. It had a limit at about 4095. This makes sense if the Horizon digitization is 12 bit and not scaled up to 65535. 

Thanks for the advice to use Dusk and not use Infinity for calibration frames.
95
Atik Horizon / Re: Horizon monochrome and C-14 Hyperstar
« Last post by Altouch on October 29, 2021, 01:44:14 PM »
Excellent!  I will stop using infinity and switch to Dusk or Artemis capture for calibration images (and maybe play with lights as well). Great news. I had though about readout method but was thinking it was associated with he exposure being so short. Change software and check the correct box.  Flats tonight!  Thank you.
96
Atik Horizon / Re: Horizon monochrome and C-14 Hyperstar
« Last post by vince on October 29, 2021, 09:49:08 AM »
Hello,

The Infinity software is not really designed for taking calibration files. You will need to use something Artemis Capture or Dusk, for very short exposures with the Horizon you will need to have the "even illumination" box ticked or you will see the gradient you are seeing, this is caused by the sensor readout method.

I hope this helps.

Vince
97
Atik Horizon / Re: Horizon monochrome and C-14 Hyperstar
« Last post by Crooro on October 29, 2021, 09:37:07 AM »
The flats are so wrong - exposure of 0.001seconds does nothing. Then you have to see what you use to make the flats, maybe the light is not homogeneous. When I flat with various filters I use homogeneous plexi to put the light in front to decrease intensity or I move the panel farther away from the optical tube .
98
Atik Horizon / Re: Horizon monochrome and C-14 Hyperstar
« Last post by Altouch on October 29, 2021, 05:31:23 AM »
Here is a sample flat mentioned in the previous post.
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Atik Horizon / Re: Horizon monochrome and C-14 Hyperstar
« Last post by Altouch on October 29, 2021, 05:29:50 AM »
The attached picture is NGC281.  This was done with LRGB and dark frames. I did not shoot flats or bias frames. I stacked the images for each individual color in Affinity Photo, and then combined them with appropriate colors also in Affinity Photo.  There is no gradient top to bottom.  However when I shoot flat fields at 0.001 second (my flat light panel is too bright to shoot slower until I design some neutral density filters for a 355mm aperture) I get a strong top to bottom gradient which is not present in the astrophoto. I am thinking it is a function of shooting flats at such a rapid exposure time - but will do trials this weekend. A sample flat field is attached in the next message. The flat does not match the vignetting I see in other images.  Processing with this flat does not produce a useful image. 
100
Deep Sky Images / Re: Imaging for a change Cocoon Nebula and the Iris Nebula.
« Last post by chakel on October 29, 2021, 02:37:45 AM »
 8)
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