Saturday, February 8, 2014

DPP: Exercise 9: Scene Dynamic Range
























This exercise is a continuation of the last, but requiring five scenes in a variety of settings and ranges.  Here is the first.  I will add more as the week progresses.   The image was captured in P mode with matrix metering and wide-area auto-focus.  The camera was then set to spot metering and single focus, and meter readings taken at each of the spots indicated with an exposure setting.  The image shows a middling dynamic range, with 3.3 stops between the darkest and lightest elements.

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This scene is dynamic in the extreme.  The above shows an exposure with no highlight clipping, which would have occurred initially in the hemi-window top.

























I engaged HDR (which produces JPG only) and achieved a somewhat better result, better meaning more visible detail in larger areas of the image.  Calculations show a dynamic range of 8 stops.  Below are corrected versions of both captures, as well as a 100% detail comparison.  The RAW capture shows more noise, but (at least to my eye) produces more appealing color.





























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This was shot from a second-floor window on a rare cloudy day, sun at about 45° left.  Dynamic range is a middling 3 stops. 


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Backlit, sun approximately 20° right, only 2.7 stops difference.  Obviously, I couldn't meter the black trousers.


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Late afternoon,  sun approximately 20° behind, camera pointed 90°, 8.3 stop dynamic range. 


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