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Thread: lens testing info

  1. #1

    lens testing info

    Hello Guys, I was wondering what the best method for testing the focus accuracy of lenses. I've heard to use a ruler at an angle. Verticle or horizontal? And at what distance. I am trying to determine if I have some front or back focus issues. Thanks Steve

  2. #2
    Senior Subscriber Member Steen's Avatar
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    Nov 2007
    Denmark, CPH
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    Re: lens testing info

    Hi Steve

    I use Tim Jacksons Focus Test Chart. Full explanation on how to use it can be found at this website:

    And here is the url address to the PDF version of the website.
    You need to print page 18 of the PDF document.

    (I posted the same reply to your identical question on the M8 board).

    / Steen

  3. #3

    Re: lens testing info

    Thanks, I will check it out. Steve

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