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Thread: Test lens

  1. #1

    Default Test lens

    I'm going to buy a brand new Sigma 50mm f1.4 lens. But heard a lot ppl say that the sigma lens got front & back focus problem. I have no idea how to test. Any experts here to share the methods of testing the lens in the shop when buying the lens.

  2. #2
    Moderator Octarine's Avatar
    Join Date
    Jan 2008
    Pasir Ris

    Default Re: Test lens

    Please do yourself a favour and use the Search function, upper right hand. Topic has been discussed in detail multiple times, just recently here:

  3. #3

    Default Re: Test lens

    yep. read the link octarine has sent to you. if you still dont understand how it works, post your questions here!


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