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Thread: Smallest aperture of a zoom lens at each focal length?

  1. #1

    Default Smallest aperture of a zoom lens at each focal length?

    Is it possible to read the smallest F number of a zoom lens from the specification sheet?
    I mean for the lens with varying largest aperture.

  2. #2
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    Default Re: Smallest aperture of a zoom lens at each focal length?

    Quote Originally Posted by dRebelXT
    Is it possible to read the smallest F number of a zoom lens from the specification sheet?
    I mean for the lens with varying largest aperture.
    When you buy a new lens sure have put max n min apertures mah. Sometimes you've to try it out. Once i was able to achieve a minimum of f/38 on my tamron lens!
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

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    Senior Member yyD70S's Avatar
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    Default Re: Smallest aperture of a zoom lens at each focal length?

    Quote Originally Posted by dRebelXT
    Is it possible to read the smallest F number of a zoom lens from the specification sheet?
    I mean for the lens with varying largest aperture.

    Usually at the two extreme focal lengths of the zoom. In between, I don't think it's stated. You have to find that out yourself.

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    Default Re: Smallest aperture of a zoom lens at each focal length?

    eh? have mah - u check the system chart in Canon EOS website, they will list out all the specs from their list of lens. Usually the prime lenses will have bigger min aperture. Alternatively try it on a cam is the fastest way to go.

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    Default Re: Smallest aperture of a zoom lens at each focal length?

    Quote Originally Posted by Maltese
    eh? have mah - u check the system chart in Canon EOS website, they will list out all the specs from their list of lens. Usually the prime lenses will have bigger min aperture. Alternatively try it on a cam is the fastest way to go.
    Not necessary...Canon's prime lens have a minimum aperture range between f/1.0 and f/5.6
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

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