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Only seeing black screen

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#1 That Astronomer

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Posted 18 May 2022 - 07:34 PM

Hey so I am using ym canon t3 with my exoplore sci ed102 telescope and when I go to live view to look for stars to align my telescope I only see black, I am not able to see any stars and I have even tried changing the setting but I still only see a black screen, and then I tried to connect it to APT and look at live view on there but I seem to only see a black empty screen please help. Thanks

 



#2 Dren

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Posted 18 May 2022 - 07:41 PM

Hey so I am using ym canon t3 with my exoplore sci ed102 telescope and when I go to live view to look for stars to align my telescope I only see black, I am not able to see any stars and I have even tried changing the setting but I still only see a black screen, and then I tried to connect it to APT and look at live view on there but I seem to only see a black empty screen please help. Thanks

My guess would be that your exposure duration is too short or you are out of focus.  Have you tried taking a long exposure shot, like 10-30 seconds? 

 

For focus, it's probably easier to focus on something really bright, like the moon.  Or you can focus on an object far far away during the day, and fine-tune the focus at night.  


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#3 Phil Sherman

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Posted 19 May 2022 - 12:54 PM

I believe that live view images are shot at 1/30 second. It's doubtful that you'll see any stars in a random FOV. To focus, you need to point the scope at a very bright star, a magnitude 2 or brighter star. Set the camera's ISO to its highest value. If you're using live view to focus, add a Bahtinov mask in front of the objective to get instant feedback as you adjust the focuser. All astronomical objects, even the moon, are located at the same distance for your scope - infinity. Don't forget to remove the mask before starting your imaging.


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#4 stargazer julie

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Posted 29 May 2022 - 12:41 PM

If you want to use live view for focusing, increase the ISO  a lot, focus on a bright star, then reduce the ISO. I think this may help. 



#5 17.5Dob

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Posted 29 May 2022 - 02:49 PM

Live view is video, so the frame rate is too high to see anything besides 1st-2nd mag stars. To see those, you still need to be in focus. It's far easy to simply take a 3-5" test shot and platesolve.


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