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Thread: Aperture sweet spot on lens?

  1. #1

    Default Aperture sweet spot on lens?

    What is the sweet spot on different apertures for sharpest image?

    I know different lenses have different sweet spots.. but in general, what is your magic number?

    f/8?

    f/11?

    f/16?

  2. #2

    Default Re: Aperture sweet spot on lens?

    Usually f/5.6 and f/11 are the sweet spots.

    But it depends on the lens. I have soe that are sharp from f/1.8 onwards.
    Alpha

  3. #3

    Default Re: Aperture sweet spot on lens?

    yap, i got a 50mm F1.4 tht is the sharpest at 3.5

  4. #4
    Senior Member Numnumball's Avatar
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    Default Re: Aperture sweet spot on lens?

    F4 and F5.6 for most of my lens
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  5. #5

    Default Re: Aperture sweet spot on lens?

    Generally, a stop or two down from max aperture of lens. If you stop down too much till like f/16, you're most likely to get less sharper details due to diffraction.

    There's a table on this site that shows diffraction value of different Canon bodies.
    Last edited by rendition; 30th November 2009 at 11:47 AM.

  6. #6
    Member Shin Howard's Avatar
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    Default Re: Aperture sweet spot on lens?

    Center sharpness usually drop quite a bit for very small aperture settings.

    I'll prefer to use 1 stop down the max aperture for zoom lens and 2 stops for prime lens.
    I'm looking at a different perpective of life.

  7. #7
    Moderator catchlights's Avatar
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    Default Re: Aperture sweet spot on lens?

    sweet spot is referring to optimum resolution power, corner to corner sharpness, etc among the aperture value.... depends on lens design, usually two stop down from wide open.

    so if a lens is sharp at wide open does not imply the sweet spot is at wide open.
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  8. #8

    Default Re: Aperture sweet spot on lens?

    Like the above post, every lens is different.
    Tum podem extulit horridulum...日出東方﹐唯我不敗。

  9. #9

    Default Re: Aperture sweet spot on lens?

    Go check out the MTR of each lesn if you want.

  10. #10

    Default Re: Aperture sweet spot on lens?

    Quote Originally Posted by happyfrog View Post
    What is the sweet spot on different apertures for sharpest image?

    I know different lenses have different sweet spots.. but in general, what is your magic number?

    f/8?

    f/11?

    f/16?
    depends la..

    frankly speaking, AROUND the sweet spot is good enough, beyond that it's just peanuts.

  11. #11
    maxtheevil
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    Default Re: Aperture sweet spot on lens?

    note 1

    2 stops below your max aperture for that zoom distance / prime lens focal length

    to

    F8


    note 2

    (generally, f5.6 to f8 is the sharp and safe aperture)


    i wrote note 2, just in case there are people who don't understand note 1.


    who ?


    people like me, when i was a newbie, telling me note 1, would mean another 7 questions.


  12. #12
    Member ITphobia's Avatar
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    Default Re: Aperture sweet spot on lens?

    Every lens has a different sweet spot.. But usually it's 1 or 2 stops below your max aperture..

  13. #13
    maxtheevil
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    Default Re: Aperture sweet spot on lens?

    go to kenrockwell.com, and read his how-to guides, it's very straight-forward and useful info for me on how to optimise the performance of my lens.

    his articles aided me, hope it does the same for the readers here.

  14. #14
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    Default Re: Aperture sweet spot on lens?

    It all depends on type of lens so sweetspots are variable.
    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.

  15. #15
    maxtheevil
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    Default Re: Aperture sweet spot on lens?

    keep the conversation clean, i think there's girls on these forum.

    let's pretend to be civil, so that we don't turn off

    1. girls

    2. international crowd.

    most of us are the children of coolies, let's pretend that we have moved on from that era and attained some civil graces.

  16. #16
    Senior Member giantcanopy's Avatar
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    Default Re: Aperture sweet spot on lens?

    plenty of input on the sweet spot issue. i would say if ur lens is 50mmf1.8 and the situation necessitates using 1.8 then use lor. if it needs f11 for more dof then use it. other than the concept of sweet spot, there is alot about using different aperture for different photographic purposes too.

    ryan

  17. #17
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    Default Re: Aperture sweet spot on lens?

    Quote Originally Posted by maxtheevil View Post
    keep the conversation clean, i think there's girls on these forum.

    let's pretend to be civil, so that we don't turn off

    1. girls

    2. international crowd.

    most of us are the children of coolies, let's pretend that we have moved on from that era and attained some civil graces.
    What's so 'unclean' about the conversation here??
    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.

  18. #18

    Default Re: Aperture sweet spot on lens?

    Quote Originally Posted by Snoweagle View Post
    What's so 'unclean' about the conversation here??
    ortega had edited someone's comments earlier, i think that post is gone.

  19. #19
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    Default Re: Aperture sweet spot on lens?

    Quote Originally Posted by night86mare View Post
    ortega had edited someone's comments earlier, i think that post is gone.
    Oh ok, no wonder it looks clean now. Thanks and noted.
    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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