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Thread: lens testing info

  1. #1
    Steve
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    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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    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:
    http://focustestchart.com/chart.html

    And here is the url address to the PDF version of the website.
    You need to print page 18 of the PDF document.
    http://focustestchart.com/focus21.pdf

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

    / Steen

  3. #3
    Steve
    Guest

    Re: lens testing info

    Thanks, I will check it out. Steve

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