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 Post Posted: Thu Jun 01, 2017 3:48 pm 
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Joined: Mon May 22, 2017 2:56 pm
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Wouldn't setting the gain to zero lower the camera's sensitivity? If the gain is set to zero would I get a crisper image?


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 Post Posted: Fri Jun 02, 2017 1:36 am 
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you need to raise the gain to make your fps fast enough and read noise lower

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 Post Posted: Fri Jun 09, 2017 3:34 pm 
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I was out again trying to image Jupiter again but the image quality is no better than before. I have attached an image taken with the CCTV lens where you can see that the image is extremely grainy. I have also attached an image of Vega that was taken with the camera attached to my 50mm guide scope where you can see that the star is not a crisp image nor are the other stars in the image. Focusing using a micro-focuser does not improve the image nor does adjusting the exposure and gain settings. I also attached the camera to my main imaging scope, a Meade 8" LX200 SCT, at f/10 and imaged the double star 6 Lyr and 7 Lyr. Both of these double stars appeared as quite large white circles (about half the size of a dime on the laptop screen at no zoom) which would not focus to a crisp pinpoint image as well no matter what I did to the exposure, gain or focus settings. I do not have an image of this however.

I am now wondering if there is something wrong with the camera as the images is always very grainy and stars are always very bloated. This makes it impossible to focus. I am using SharpCap for image capture and I have downloaded the latest drivers from ZWO.

Robin


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File comment: Image taken with CCTV lens
CCTV lens.JPG
CCTV lens.JPG [ 144.58 KiB | Viewed 180 times ]
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 Post Posted: Fri Jun 09, 2017 3:40 pm 
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Here is the image of Vega taken through my guide scope


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File comment: Vega through 50mm guide scope
Test Vega_0001.jpg
Test Vega_0001.jpg [ 262.82 KiB | Viewed 180 times ]
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 Post Posted: Tue Jun 13, 2017 7:32 am 
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the grainy problem is dew to the gain is very high
you can turn down the gain for a smooth image

about the image of your guide scope
I think the optics is not very good

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