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Thread: How to compensate overexpose and underexpose

  1. #1

    Default How to compensate overexpose and underexpose

    when i focus on the sky, the grass got underexpose



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    but when i focus on the grass, the sky got overexpose



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    can any tell mi how to balance between the right amount of exposure on the sky and the grass?
    Last edited by stomper; 20th June 2010 at 08:10 PM.

  2. #2

    Default Re: How to compensate overexpose and underexpose

    Welcome to CS!

    That's because the EV range of the sky and ground is too wide. No sensor or film can capture that wide a range in a single shot.

    Google 'Dynamic range'.

    To 'compensate' or get a more balanced photo where you retain details in the sky (not over-exposed) AND get an adequately exposed foreground (not too dark), you have several options:

    1) Use a graduated neutral density filter (GND)
    2) Take two separate photos, exposing correctly for each part of the photo and merge them in post production (PhotoShop, Lightroom etc)
    3) Do a High Dynamic Range photo (HDR)

    Ref: Google the following for instructions:

    1) Graduated neutral density filter (GND)
    2) Tone Mapping
    3) HDR

    All the best!

  3. #3
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    Default Re: How to compensate overexpose and underexpose

    I believe there is 2 methods using a
    1. GND filter
    a filter that darkens the sky only google u can find lotsa info
    2. HDR post processing
    combining 2 different exposed picture into 1

    camera unable to capture that much dynamic range.

    Hope these help
    Nikon F3HP FM2N Rollei 35 and .......... :)

  4. #4

    Default Re: How to compensate overexpose and underexpose

    wow
    thanks for the quick reply

    very informative

    will go google for the info you guys ahve mentioned

    i currently using zeta protector for my len (kit len)

    do you should i get a UV filter for my lens?
    Last edited by stomper; 20th June 2010 at 08:33 PM.

  5. #5
    Senior Member Diavonex's Avatar
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    Default Re: How to compensate overexpose and underexpose

    Shoot when the sun is low and shining on the grass. That will reduce the density difference between the sky and the grass.

    Last edited by Diavonex; 20th June 2010 at 08:43 PM.

  6. #6

    Default Re: How to compensate overexpose and underexpose

    http://www.pbase.com/jpeper/image/32267513/original.jpg

    I happened to chance on this before so i thought I share with you on with or without UV filter.

    Enjoy photography and let the photos you took along the way, guide you in what you need and what you dun May the Force be with you

  7. #7
    Senior Member Diavonex's Avatar
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    Default Re: How to compensate overexpose and underexpose

    This picture of the same location was shot with a polarising filter.


  8. #8

    Default Re: How to compensate overexpose and underexpose

    Quote Originally Posted by davee78 View Post
    http://www.pbase.com/jpeper/image/32267513/original.jpg

    I happened to chance on this before so i thought I share with you on with or without UV filter.

    Enjoy photography and let the photos you took along the way, guide you in what you need and what you dun May the Force be with you
    it seems that UV filter make ur picture look a bit yellowish

  9. #9
    Senior Member ovaltinemilo's Avatar
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    Default Re: How to compensate overexpose and underexpose

    If you can't get all in 1 shot. Then you got to decide the best exposure for your subject or exclude the sky if it's really too much tonal away....
    ...:::..::.Nikon.::.:::..
    RGB Metering & Focusing.

  10. #10

    Default Re: How to compensate overexpose and underexpose

    I am a newbie myself and I realised it can be tricky to get an acceptable exposure especially when I am quite inexperienced and when viewing through the viewfinder. I uses 500D and I realised that at times using the Live view mode through LCD helps because it shows the changes of your output picture 'LIVE' when you are focusing and metering at specific places ' the white rectangular box'. So sometimes when I am in no hurry, I will also slowly adjust through the lcd screen until I get an acceptable picture but I think nothing beats the techniques mentioned above by the more experienced people.

  11. #11

    Default Re: How to compensate overexpose and underexpose

    Quote Originally Posted by gundamseed84 View Post
    I am a newbie myself and I realised it can be tricky to get an acceptable exposure especially when I am quite inexperienced and when viewing through the viewfinder. I uses 500D and I realised that at times using the Live view mode through LCD helps because it shows the changes of your output picture 'LIVE' when you are focusing and metering at specific places ' the white rectangular box'. So sometimes when I am in no hurry, I will also slowly adjust through the lcd screen until I get an acceptable picture but I think nothing beats the techniques mentioned above by the more experienced people.
    oh

    never thought that liveview can "preview" the pic in real time

    thanks for the info

  12. #12
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    Default Re: How to compensate overexpose and underexpose

    Well the UV filter helps to reduce some Haze in the atmosphere.
    *or something like that, correct me if i am wrong *

    Not much experience with different UV filters but mine slightly tinted yellow.
    Nikon F3HP FM2N Rollei 35 and .......... :)

  13. #13

    Default Re: How to compensate overexpose and underexpose

    ya

    was thinking of getting a UV filter when i got my cam

    but the guy dun have UV filter for my lens size

    so he bundle a protector instead

  14. #14
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    Default Re: How to compensate overexpose and underexpose

    Well i had the UV filter on mainly as a protector.
    Dont feel it helps much with the pictures, but cheap UV filters do affect IQ in some way/s.

    Protector should be sufficient, but i think more experienced CSers should be able to advise you correctly.

    Can try to look into polarizer, the use quite limited, though effect is good for the sky.
    *as shown by Diavonex*
    Nikon F3HP FM2N Rollei 35 and .......... :)

  15. #15

    Default Re: How to compensate overexpose and underexpose

    Use digital blending in Photoshop,if u need help pls search google.
    NIKON D90+MB-D80 | Nikkor 50 1.8 1:1.8 | Tamron 18-270VC |Tamron 17-50 2.8 |SB600

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