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Thread: my lens says max aperature 3.5-6.3 . is it 3.5 or 6.3 ?

  1. #1

    Default my lens says max aperature 3.5-6.3 . is it 3.5 or 6.3 ?

    Hi,

    My lens says this:

    max. aperture: 3.5-6.3
    min. aperture: 22

    This is a 18-250 mm lens.

    So is the max aperture 3.5 or 6.3
    Why 2 values in max aperture ?


    Thanks,

  2. #2

    Default Re: my lens says max aperature 3.5-6.3 . is it 3.5 or 6.3 ?

    Hi Bro
    from my understanding (i'm a newbie),
    3.5 is the max aperture when u use the wide angle
    6.3 is the max aperture when you zoomed in all the way
    Life is short, so shoot more!

  3. #3

    Default Re: my lens says max aperature 3.5-6.3 . is it 3.5 or 6.3 ?

    Oh.

    Thanks.
    Now got it.

  4. #4

    Default Re: my lens says max aperature 3.5-6.3 . is it 3.5 or 6.3 ?

    In short, it means max aperture for 18mm is f/3.5 and that for 250mm is f/6.3

    Quote Originally Posted by sglion View Post
    Hi,

    My lens says this:

    max. aperture: 3.5-6.3
    min. aperture: 22

    This is a 18-250 mm lens.

    So is the max aperture 3.5 or 6.3
    Why 2 values in max aperture ?


    Thanks,
    5D3|1740L|70200F4L|40

  5. #5

    Default Re: my lens says max aperature 3.5-6.3 . is it 3.5 or 6.3 ?

    your lens is not a fixed aperture lens.

    at 18mm, its biggest aperture is f3.5.
    when you zoom to 250mm, the biggest aperture you can use is f6.3.

    that is the reason why there are 2 max aperture numbers.

  6. #6

    Default Re: my lens says max aperature 3.5-6.3 . is it 3.5 or 6.3 ?

    Thank you all.

  7. #7

    Default Re: my lens says max aperature 3.5-6.3 . is it 3.5 or 6.3 ?

    and in between it might be f/4.0, f/5.6, accordingly.

    this is because of the lens design.

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