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  • Digital Cameras: Automatic and Manual Exposure
  • From "Digital Photography"
    episode DPG-104
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    Professional photographer Rick Sammon gives advice on getting a good exposure in various lighting situations.

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    Figure A

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    Figure B

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    Figure C

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    The image on the left was shot outdoors on a sunny day without a flash. The image on the right was shot under the same conditions with a flash used for fill-in lighting -- resulting in better detail on the subject's face.

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    Figure D

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    Figure E

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    In the image on the left, overhead branches cast shadows across the subject's face. The shadows were effectively eliminated through use of the camera's built-in flash.

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    Figure F

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    Figure G

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    Figure H

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    Figure I

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    Figure J

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    Figure K

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    Figure L

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    Figure M

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    Figure N

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    Figure O




    The best way to improve your results in taking digital photograph is to gain thorough familiarity with all of the features and capabilities of your digital camera. This episode of DIY's Digital Photography workshop addresses some of the basics of using your camera effectively -- including use of flash and exposure, image resolution, motion photography and tips for use of batteries and memory cards.








    Using the Camera's Flash for Fill-Lighting





    Just because you're shooting outdoors on a sunny day, don't assume you can always rely on available light and your camera's autoexposure mode. There are cases where use of the flash will improve your results even outdoors.





    For example, if you're taking portrait shots and your subject is back-lit or lit from directly overhead, the camera may not pick up all of the detail on the subject's face. Though you may visually be able to see detail adequately with your eye, the limitations of the camera may result in an image with less-than-perfect lighting and detail. Notice in our example shot made without a flash (figure A) that the exposure on the background is better than that of the subject.





    With the camera's builti-in flash activated (figure B), under the same natural-light conditions, a better overall exposure results (figure C).






    Using the Camera's Flash to Eliminate Shadows


    The camera's flash is also useful in outdoor-shooting situations where objects (such as overhead tree limbs) cast annoying shadows across the subject (figure D).





    With the camera's built-in flash activated, the shadows disappear as the flash casts light directly on the subject (figure E).









    Using the Camera's Flash in Shaded Outdoor Settings


    Consider using your flash outdoors when your subject is in the shade (figure F). Aside from the possibility that the overall exposure may be too dark, overhead light that's being filtered through leaves or other overhead shade may cause a greenish cast on the subject, resulting in unnatural skin tones (figure G, LEFT). Shade may also result in the exposure requiring a shutter speed so slow that blurring results.





    Proper use of the flash give fuller illumination to the subject, providing sharper detail and more natural and accurate colors (figure G, RIGHT). The flash setting will also allow for a faster speed, suitable for most shooting situations.









    Using the Camera's Flash Indoors


    In most indoor-shooting situations (figure H), normal available lighting is not sufficient for a good photograph. There may not be enough light to get an exposure at a reasonable shutter speed, resulting in a blurred photo. Even in brightly lit interiors, the overall picture may be too dark or have overly dark areas (figure I).






    Tip : With indoor flash photography, strive to compose your picture so that your main subject fills most of the frame. Otherwise, your subject may be overexposed as the flash tries to provide enough light to fill the whole area. Move in closer to your subject in order to fill more of the frame (figure J).









    Avoiding Glare in Flash Photography


    You may run into problems using your flash if your shot includes mirrors, glass surfaces or other highly reflective surfaces that may give a direct reflection from the flash. In our example, a reflection appeared behind the subject as the light of the flash bounced off of a glass display case (figure K).





    If you're shooting against a reflective background such as glass, shoot so that you are standing at an angle to it (figure L) rather than shooting toward the surface straight on.





    By shooting at an angle, you're less likely to pick up glare or reflection on glass and other reflective surfaces (figure M).









    When Not to Use Flash


    There are situations where it's best not to use a flash. One example may occur when you're shooting subtleties of light or light sources.


    In our example, the photographer was shooting from an arbor at dusk (figure N). When the flash was used in close proximity to the tiki torch and arbor surfaces, the result was an overexposed shot that robbed the photo of detail and the nuances of the twilight sky.





    The same shot made without a flash (figure O) allowed the definition on the arbor surface and torch-basket to come through, as well as the subtle lighting of the flame and the darkening sky. A slower shutter speed was required to get this exposure, so it was important to hold the camera perfectly still during shooting.






    Tip: Use a tripod when shooting in low-light, naturally lit situations to reduce the possibility of camera movement while using a slower shutter speed.


    RESOURCES :
    Kodak Information

    Tips, techniques, tutorials and information on cameras and film.

    To e-mail Kodak, click here.

    To access Kodak's contact information, click here.

    www.kodak.com

    Kodak
    Website: www.kodak.com

    Rick Sammon, professional photographer

    Web site: www.ricksammon.com

    Learn more about photography with Rick Sammon's new e-book on CD. More than 100 tips and photographs from Rick's travels around the world.

    And check out Rick's column on Kodak's site:
    Web site: www.kodak.com/US/en/corp/magazine/tips/2001_10


    Rick Sammon
    Croton-on-Hudson, NY 10520
    Email: RickSammon@aol.com
    Website: www.ricksammon.com

    Special Thanks for DIY's Digital Photography workshop, episodes 101-105

    Adobe Photoshop
    Web site: www.adobe.com

    PC Photo magazine
    Web site: www.pcphotomag

    Kodak
    Web site: www.kodak.com

    Epson America, Inc.
    Web site: www.epson.com

    Kinkos
    Web site: www.kinkos.com

    Ulead Cool 360
    Web site: www.ulead.com

    The Digital Wallet
    Web site: www.mindsatwork.net

    The L.A. County Arboretum
    Web site: www.arboretum.org

    PC Photo magazine
    Website: www.pcphotomag.com
    Online version of the magazine devoted to digital photography and related technologies.

    The Complete Idiot's Guide to Digital Photography
    Model: 002864235X
    Author: Steven Greenberg
    Order this book from Amazon.com.
    Prentice Hall
    Paramus, NJ 07652

    Digital Photography For Dummies
    Model: 0764506463
    Author: Julie Adair King
    Order this book from Amazon.com.
    Hungry Minds, Inc.

    Complete Digital Photography
    Model: 1584500077
    Author: Ben Long
    Order this book from Amazon.com.
    Charles River Media
    Website: www.charlesriver.com/

    50 Fast Digital Photo Techniques
    Model: 0764535781
    Author: Gregory Georges, Cris Rys
    To order this title from Amazon, click here.
    Hungry Minds, Inc.

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