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Thread: Lens Hood vs Overexposure

  1. #1

    Default Lens Hood vs Overexposure

    can a lens hood actually help to cope with overexposure??

    after adjusting the exposure settings, i sometimes still experience overexposure in some parts of the pictures...

    can a lens hood help to solve this problem??


    pls advise

  2. #2

    Default Re: Lens Hood vs Overexposure

    only if the overexposure is caused by strong light sources entering your lens from outside the frame. If not, it's you not reading your meter/histogram correctly, or not using the correct metering mode.
    Alpha

  3. #3

    Default Re: Lens Hood vs Overexposure

    Post a photo here so that we can tell you what exactly is wrong.

    I have a feeling the dynamic range of the scene is too great for your camera.
    Olympian

  4. #4

    Default Re: Lens Hood vs Overexposure

    Camera can only capture up to 5-stops different in brightness. In certain situations, a GND filter may helps. Otherwise, can use exposure bracketing and then do PP.

  5. #5
    Senior Member ovaltinemilo's Avatar
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    Default Re: Lens Hood vs Overexposure

    Hi TS, overexposing has no real direct relationship with the lens hood. The main function of lens hood is to help eliminate stray light. Overexp/Underexp depends on the metering technique. It would be more helpful to look at how histogram works. But do keep in mind that some scenes exceed the dynamic range of your camera..which means it would bound to clip some area of the scene.
    Last edited by ovaltinemilo; 24th October 2010 at 12:11 AM.
    ...:::..::.Nikon.::.:::..
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  6. #6

    Default Re: Lens Hood vs Overexposure

    Hmmm when I take my pictures I'll usually adjust the metering followed by taking a few pictures adjust the exposure +- lo

  7. #7

    Default Re: Lens Hood vs Overexposure

    Quote Originally Posted by alancwr View Post
    Hmmm when I take my pictures I'll usually adjust the metering followed by taking a few pictures adjust the exposure +- lo
    That's the whole point. If the difference between the darkest and lightest parts of the scene is too great, your camera can't nail the exposure in a single shot unaided.
    Olympian

  8. #8

    Default Re: Lens Hood vs Overexposure

    Quote Originally Posted by candycaine View Post
    That's the whole point. If the difference between the darkest and lightest parts of the scene is too great, your camera can't nail the exposure in a single shot unaided.
    Hmmm I'm sorry but I dun really understand this
    Can explain in more layman term?

  9. #9

    Default Re: Lens Hood vs Overexposure

    Quote Originally Posted by alancwr View Post
    Hmmm I'm sorry but I dun really understand this
    Can explain in more layman term?
    The brighter parts of your photo need a very fast shutter speed to be "correctly exposed".
    The darker parts of your photo need a slower shutter speed to be "correctly exposed".

    Your camera can't correctly expose for everything in one photo.

    Can understand?
    Olympian

  10. #10

    Default Re: Lens Hood vs Overexposure

    Oh yeah now I understand
    I can't properly expose the picture without going thru photoeditting?

  11. #11

    Default Re: Lens Hood vs Overexposure

    Quote Originally Posted by alancwr View Post
    Oh yeah now I understand
    I can't properly expose the picture without going thru photoeditting?

    Most of the time yes.

    But there are ways to correct the uneven exposure in some situations, by using a GND. Do a search on that, there are many threads that talk about GNDs.

    Hope this helps
    Olympian

  12. #12

    Default Re: Lens Hood vs Overexposure

    GND or Active D-lighting (on Nikon) will help with huge contrast.

    Or you can shoot HDR with multiple exposure.

  13. #13
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    Default Re: Lens Hood vs Overexposure

    Based on my experience, using polarizer you may have a little more dynamic range.
    Experts, please comment

  14. #14
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    Default Re: Lens Hood vs Overexposure

    Overexposure is due to the sensor unable to capture the dynamic range of light. For better dynamic range, use film. Film has a lot higher dynamic range than digital sensors. Else do more digital blending or HDRI.

    Polarizer will bring out more contrast and reduce glare, but is of little help in dynamic range. GND may not help that much also unless its more of a landscape shot with clear horizon.

  15. #15
    Moderator catchlights's Avatar
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    Default Re: Lens Hood vs Overexposure

    Quote Originally Posted by alancwr View Post
    can a lens hood actually help to cope with overexposure??

    after adjusting the exposure settings, i sometimes still experience overexposure in some parts of the pictures...

    can a lens hood help to solve this problem??


    pls advise
    the purpose of lenshood is shielding stray light from cast on the front element for causing lens flare, to improving image quality, it has noting to do with overexposed image or help to prevent overexposed.
    Shoot to Live, Live to Shoot
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  16. #16
    Senior Member giantcanopy's Avatar
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    Default Re: Lens Hood vs Overexposure

    Quote Originally Posted by alancwr View Post
    Oh yeah now I understand
    I can't properly expose the picture without going thru photoeditting?
    Quote Originally Posted by candycaine View Post
    Most of the time yes.
    That depends on the type of scene you usually capture.
    For me nowadays i select the scene that i can capture and do minimal pulling of details just from raw for > 90 percent of my shots. Blending / hdr is just abit too laborious, and i think i am too lazy.

    Apart from chasing high dynamic range, remember that contrast and disparity can be beautiful too. Not everything is about chasing and getting details from the brightest to darkest shades

    ryan

  17. #17

    Default Re: Lens Hood vs Overexposure

    Hi, In extreme cases where the light is uneven, camera metering(multi segment) can't take 18%grey even with EV compensation. Some cameras come with hdr which is handy in such cases.
    Other than that, shoot at different angles to get the best composition.

  18. #18

    Default Re: Lens Hood vs Overexposure

    Quote Originally Posted by giantcanopy View Post
    That depends on the type of scene you usually capture.
    For me nowadays i select the scene that i can capture and do minimal pulling of details just from raw for > 90 percent of my shots. Blending / hdr is just abit too laborious, and i think i am too lazy.

    Apart from chasing high dynamic range, remember that contrast and disparity can be beautiful too. Not everything is about chasing and getting details from the brightest to darkest shades

    ryan

    I know. Not everything has to be edited laboriously via exposure blend. My answer to his question is that yes, processing is necessary most of the time, for "proper exposure", but proper might not always be pleasing.

    That said, you might want to take a look at Photomatix if you haven't already done so, the blending is automated and relatively reliable- for the rare occasions that you wish to exposure blend in the first place
    Olympian

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