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Thread: what does the number on the lens mean?

  1. #1

    Default what does the number on the lens mean?

    Have been looking around in the forum and have been quite confuse on the numbers when someone is talking about the lens... eg Sigma 70-300mm what does the 70-300mm means? The focal length that this lens can do? Hope someone can help.. thanks!

  2. #2
    Senior Member
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    Default Re: what does the number on the lens mean?

    Quote Originally Posted by astroman
    Have been looking around in the forum and have been quite confuse on the numbers when someone is talking about the lens... eg Sigma 70-300mm what does the 70-300mm means? The focal length that this lens can do? Hope someone can help.. thanks!
    Yes.

    It is called zoom lens. Start from 70mm (consider as short tele) and end at 300mm (consider as long tele).

    Regards,
    Arto.

  3. #3
    Moderator ortega's Avatar
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    Default Re: what does the number on the lens mean?

    get yourself a lens catalog or download one and read
    lots of information and pictures to illustrate

  4. #4

    Default Re: what does the number on the lens mean?

    ya..i agreed wif Ortega.. u can do some reseach on lens n do some reading..

  5. #5

    Default Re: what does the number on the lens mean?

    Go to google, type zoom lens and the answers will be there.
    One of them is below.

    www.answers.com/topic/zoom-lens

    Cheers
    cecil

  6. #6
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    Default Re: what does the number on the lens mean?

    Or try reading this tutorial:

    http://www.deviantart.com/view/16486089/

    Scroll down till you reach the picture of the lens and that section should explain what you need to know.

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