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HDR = High Dynamic Range

HDR = High Dynamic Range. Digital has been slow to develop in the dynamic range. DR is the ability to resolve detail across the entire range of exposure including details in the highlights as well as the shadows. HDR. Eye > Film Digital.

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HDR = High Dynamic Range

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  1. HDR = High Dynamic Range Digital has been slow to develop in the dynamic range. DR is the ability to resolve detail across the entire range of exposure including details in the highlights as well as the shadows. HDR

  2. Eye > Film Digital • Generally, our eyes have the greatest DR. Film has pretty good DR with Digital having the least DR. • Film has about 2-3 stops of latitude. This means that you can over or underexpose by 2-3 stops and still have details. Or if you have a picture that is mostly dead on, you will have 2-3 stops of details in the shadows and in the highlights. • Digital has had FAR less latitude than film with only about ½ of a stop. • The challenge presents itself in lighting situations when there is a large difference between the brightest part and the darkest part of a picture. If a picture is evenly lit, there probably will not be a DR challenge. The challenge is when there is a really bright part of the picture…and a really dark part.

  3. HDR Digital Merge • This is a process of creating a composite image from deliberately underexposed and overexposed images. • Instead of taking just one picture, you take 3-9 exactly composed images (with a tripod to prevent any image shifting) with each image of a different exposure. • So, in this situation, you CHANGE your exposure (exposure bracketing) rather than SHIFT (equivalent exposures).

  4. Exposure Bracketing + 5 • Place the camera on a tripod. • Meter the scene and take a picture to get a good overall exposure. • Then, increase to +2 on the exposure compensation. This will make for a brighter picture. • Then repeat for +5, -2 and -5. + 2 0 - 2 - 5

  5. Exposure Bracketing • Taking 3 shots at different exposures (or 5, 7, or 9) • Bracket can be set in 1/3, ½ or 1 stop increments • Exposure range can be set to –2 to +2 stops - .7 stop Normal exposure +.7 stop

  6. HDR Digital Merge • Using Photoshop or other HDR Merging Program, the images will be merged together to create a composite image.

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