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Thread: 18-55mm kit lens softness? or is it just me...

  1. #1

    Default 18-55mm kit lens softness? or is it just me...

    Took these shot some time ago with the kit lens. The rest of the pictures have similar softness too.

    1/4 sec, f27, iso 100, 24mm, no flash, center weighted metering, AF-S mode. Mounted on tripod.



    a crop:


    Am I using too high an aperture value, is it an issue with the lens, or any sort of problem?
    Thanks!
    Functional disorder

  2. #2

    Default Re: 18-55mm kit lens softness? or is it just me...

    The aperture at f27 is most probably the cause.

    Too small aperture, diffraction of light becomes an issue.

    Try taking a shot at f8.



    cheers

  3. #3
    Member
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    Default Re: 18-55mm kit lens softness? or is it just me...

    I believe if you shoot @ F11 or f8 should be alright.
    Let's get rolling :)

  4. #4

    Default Re: 18-55mm kit lens softness? or is it just me...

    Thanks... so i see that the most extreme apertures of a lens is always the worse part? Never thought of f27 cuz i always thought only the wide end is bad.. cuz got tripod and want everything sharp so kiasu lor
    Functional disorder

  5. #5
    Member/Tangshooter Redsun's Avatar
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    Default Re: 18-55mm kit lens softness? or is it just me...

    Bro,its diffraction
    thats why its not sharp
    try F8-11
    to know more about diffraction,read here
    http://www.kenrockwell.com/tech/diffraction.htm

  6. #6

    Default Re: 18-55mm kit lens softness? or is it just me...

    There's also some test report here

    http://www.photozone.de/Reviews/Nikk...report?start=1

    If you use ~f/6.7-f/11 you'll be a happy camper in most situations. Quote from the article

  7. #7
    Moderator catchlights's Avatar
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    Default Re: 18-55mm kit lens softness? or is it just me...

    the sweet spot of most lens are two to three stop down.

    with wide angle, f11 can cover a lot depth of field, don't need to shoot above f22, you get diffraction more then depth of field.
    Shoot to Live, Live to Shoot
    www.benjaminloo.com | iStock portfolio

  8. #8

    Default Re: 18-55mm kit lens softness? or is it just me...

    oops.. din realise that it's a pentax... but should be ard the same

  9. #9

    Default Re: 18-55mm kit lens softness? or is it just me...

    f/8 to f/11 is the best for the kit lens from my experience

    above f/16 you start getting diffraction problems, will degrade picture quality

    which is why most of the time most professional landscape photographers will limit their apertures to at around f/13 to f/19.. you slowly trade off depth of field for sharpness

    for kit lens, pentax's version is one of the best out there, believe me; i've seen other brands and for the price, it doesn't come any better than this. even most tests agree.

    shooting wide-open will give you softness too, btw

  10. #10

    Default Re: 18-55mm kit lens softness? or is it just me...

    i see... thanks for being so informative! Next time i'll be sure to shoot between f8~f16.
    Functional disorder

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