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Thread: Focusing tip while using a DSLR for astro work.

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    Default Re: Focusing tip while using a DSLR for astro work.



    Awesome advice from everyone! Personally I use a camera that does not support live view. So for me it is a Bahtinov mask and reviewing the shots on the display panel while zoomed in.

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    Default Re: Focusing tip while using a DSLR for astro work.

    Quote Originally Posted by somecdnguy View Post
    Personally for focusing now I use the Fotosharp t-ring combined with a 2x right angle viewfinder for the 20D. have not used this combination a lot yet but the few times I've played around with it, it works quite well and I can get a good focus in about 30 seconds. Will be able to play around with it more tomorrow night when I head up to the dark sky site right after work.
    Same here. Bought the FotoSharp last month and it works great with my 60Da and LX800-14. It's basically an adapter plate with a Dandelion chip. Also works great with my 6D, 5D Mk III, and 1D-X, but plays Hell with my 7D—as Dandelion chips are wont to do. The 7D simply doesn't like them, and repeated firmware upgrades by Canon have not addressed it.
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    Default Re: Focusing tip while using a DSLR for astro work.

    Don't remember where I saw it but for using live view mode to focus, set your mode to "B" bulb then crank the ISO up as high as your DSLR will go (25600, 12800, 6400 ISO) Then find a star, dimly lit ones are best, focus back and forth until the star is the smallest pin point of light. It may take a few minutes to achieve focus but it works great for me. Though I am shooting through a 600mm lens and not a telescope.
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    Default Re: Focusing tip while using a DSLR for astro work.

    I have a very old Sony a200, and when focusing onn an object during daytime hours, find that the object it always very blurry. I have been told that I need to use software on my laptop, while my camera is attached and connected to both camera and laptop. Is this correct please?

 

 
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