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Photography Q&A
HDR Question - Length Between Exposures?
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<blockquote data-quote="yauman" data-source="post: 364134" data-attributes="member: 15418"><p>No - HDR is not time-lapse photography. HDR - High Dynamic Range is a way to INCREASE the exposure dynamic range of your camera for that one image. Most digital camera are capable of capturing about 12 EV (exposure value) range per image. In a situation where 12 ev range is not enough like the scene consists of brights that too bright and darks that too dark for that range, ie the sky will be over exposed and the rock shadows will be under, HDR lets you get the proper exposure for all those areas. So, you take one 1 stop over, one just right and one 1 stop under for a 3 image HDR. The 1-stop over will properly expose the rock shadow, the one stop under will properly expose the sky and the 0-stop is for everything else. (Sometime you need to do 5 or even 7 exposure to get everything exposed right.) So, we are talking about ONE picture - you need to do the images as close in time as possible with each other as possible so things don't change between the images. If you wait a few minutes between shots, say with the sky, the sun or clouds would have changed position and so when you combine the images, you'll get multiple suns and clouds will look like a bad fake photoshopped job!</p><p></p><p>So, it's not time-lapse photography. The answer is the images have to be as immediate as possible. In my D7100, I set my CL continuous shutter to do 3 shot so when set to bracket shooting, I press the shutter once and all 3 HDR images are shot.</p><p></p><p>Hope this help.</p><p></p><p>Yau-Man</p></blockquote><p></p>
[QUOTE="yauman, post: 364134, member: 15418"] No - HDR is not time-lapse photography. HDR - High Dynamic Range is a way to INCREASE the exposure dynamic range of your camera for that one image. Most digital camera are capable of capturing about 12 EV (exposure value) range per image. In a situation where 12 ev range is not enough like the scene consists of brights that too bright and darks that too dark for that range, ie the sky will be over exposed and the rock shadows will be under, HDR lets you get the proper exposure for all those areas. So, you take one 1 stop over, one just right and one 1 stop under for a 3 image HDR. The 1-stop over will properly expose the rock shadow, the one stop under will properly expose the sky and the 0-stop is for everything else. (Sometime you need to do 5 or even 7 exposure to get everything exposed right.) So, we are talking about ONE picture - you need to do the images as close in time as possible with each other as possible so things don't change between the images. If you wait a few minutes between shots, say with the sky, the sun or clouds would have changed position and so when you combine the images, you'll get multiple suns and clouds will look like a bad fake photoshopped job! So, it's not time-lapse photography. The answer is the images have to be as immediate as possible. In my D7100, I set my CL continuous shutter to do 3 shot so when set to bracket shooting, I press the shutter once and all 3 HDR images are shot. Hope this help. Yau-Man [/QUOTE]
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HDR Question - Length Between Exposures?
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