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how to focus on DSO...

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#1 Illsonmedia

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Posted 22 November 2012 - 05:27 PM

Okay, I have a huge issue with achieving the proper focus when I have my DSLR t-ringed into my celestron. First of all, when monitoring the live view through my computer, I cannot see the DSOs well enough to tell if they are focused or not. So I take a short exposure shot and check the focus, if it isn't focused, I change the focus on the scope, and repeat the process. But I still cannot get the proper focus.

Someone please tell me there is a way to get this done. My exposure shots aren't properly focused. I use a mac....so, preferably no windows only software.

#2 jsc2501

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Posted 22 November 2012 - 05:33 PM

What type of camera are you using?

#3 drksky

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Posted 22 November 2012 - 05:42 PM

Don't. Get a batinov mask and focus on a nearby bright star. Then move to your target, frame and shoot.

#4 Tapio

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Posted 22 November 2012 - 05:46 PM

It's better to use brighter star first, focus, and then move to target. And get yourself a Bahtinov mask - it helps.

#5 Maverick199

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Posted 23 November 2012 - 04:43 AM

Use your DSLR's live view function to focus on a star. If the function permits zooming in, then zoom in to check if focus is correct. Once fixed, you can start imaging any DSO.

#6 Raginar

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Posted 24 November 2012 - 07:01 AM

Don't. Get a batinov mask and focus on a nearby bright star. Then move to your target, frame and shoot.

:bow:

#7 NorthBoundTrain

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Posted 25 November 2012 - 09:27 AM

Don't. Get a batinov mask and focus on a nearby bright star. Then move to your target, frame and shoot.


+2

#8 Mark72

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Posted 25 November 2012 - 03:11 PM

Use also Bahtinov grabber - after PHD the best help.

Mark

#9 Mary B

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Posted 25 November 2012 - 04:38 PM

Go with the bahtinov mask and save yourself some headaches.






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