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Thread: How to test a lens for CA?

  1. #1

    Default How to test a lens for CA?

    1)As the title suggest. How do you test a lens for presence of CA.

    2)And if there is CA, to what degree is it acceptable.

    3)Or as long as there is CA present,irregardless the degree of it,it is highly advisable not to own it?

    Thanks

  2. #2
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    Default Re: How to test a lens for CA?

    1)As the title suggest. How do you test a lens for presence of CA.

    Shoot a high contrast scene. Building against sky works best.

    2)And if there is CA, to what degree is it acceptable.

    There really is no answer to this.

    If the govt decides to increase GST now, a how many percentage point increase is acceptable, assuming you can't say zero?

    3)Or as long as there is CA present,irregardless the degree of it,it is highly advisable not to own it?

    Every SLR lens suffers CA to some extent. If you set zero CA as a criteria, you'll never own any lens.
    Last edited by solarii; 28th June 2006 at 08:41 PM.

  3. #3
    Senior Member +evenstar's Avatar
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    Default Re: How to test a lens for CA?

    Quote Originally Posted by Henessy
    3)Or as long as there is CA present,irregardless the degree of it,it is highly advisable not to own it?

    Thanks
    Even Canon's Ls and Nikon ED lens have CA...
    eat. drink. shoot

  4. #4
    Member Taurean's Avatar
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    Default Re: How to test a lens for CA?

    What is CA?

  5. #5
    Senior Member +evenstar's Avatar
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    Default Re: How to test a lens for CA?

    Quote Originally Posted by Taurean
    What is CA?
    chromatic aberration
    eat. drink. shoot

  6. #6
    Member Taurean's Avatar
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    Default Re: How to test a lens for CA?

    Quote Originally Posted by +evenstar
    chromatic aberration
    Thanks +evenstar. Shall do a google on the term n read more abt it

  7. #7

    Default Re: How to test a lens for CA?

    Any sample picture to show very severe CA?

    Thanks

  8. #8

    Default Re: How to test a lens for CA?

    Take a picture of a tree with branches against a bright sky and see if you like what you see. If you like it keep the lens.
    http://singaporephoto.blogspot.com

  9. #9

    Default Re: How to test a lens for CA?

    Then how about prime lens.Do they exhibit CA?

    Thanks

  10. #10
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    Default Re: How to test a lens for CA?

    Quote Originally Posted by Henessy
    Then how about prime lens.Do they exhibit CA?

    Thanks
    Perhaps you should read up about CA to better understand what it is all about, why it occurs etc.

    Members can guide you along and help you understand concepts, but you should make an attempt to read up and understand the topic if you are truly interested and concerned. If you read up, you should be able to answer this question yrself.

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