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High Dynamic Range
Photography
HDR Handout
CCCC Presentation on Nov 11, 2008; Bob Lott
Rules for Shooting HDR
1. Lock f-stop (aperture - which controls your depth of field).
2. Lock focus.
3. Lock white balance.
4. Set Quality for RAW format.
5. Turn off any in-camera “automatic” image enhancing (i.e., auto-contrast
or auto-
saturation including sharpening or auto-ISO). You will be bracketing the
exposure time
for your various photos.
Purist Approach
1. Mount your camera on a tripod.
2. Set your camera to manual exposure mode. Select an appropriate aperture
for your scene.
3. Measure the light in the brightest part of your scene (spot metering) and
note the
exposure time. Do the same for the darkest shadows of your scene.
4. Determine the number and value of exposures necessary:
a. Take as a basis the exposure time measured for the highlights & multiply
this
number by 4 to find the next exposure with a stop spacing of 2 EV.
b. Multiply by 4 successively for the next exposures till you pass the
exposure
measured for the shadows (Note: For most daylight scenes excluding the sun,
3
exposures spaced by 2 EVs are often sufficient to cover the dynamic range).
5. Take the shots at each of the exposure times determined above. (Dark to
light if possible,
to make it easier to locate the images for HDR processing.)
Practical Approach
1. Mount your camera on a tripod.
2. Set your camera in continuous shooting mode.
3. Set your camera to autobracket on exposure time.
4. Select the bracket between exposures to 1 or 2 EV, depending on your
camera.
5. Select the number of autoexposure steps:
a. 3 for 2 EV spacing
b. 5 for 1 LV spacing
6. Hold the shutter button down until the 3 or 5 exposures are completed.
Image Processing
1. Using appropriate software, select desired images and generate HDR image.
2. Tonemap the HDR image to allow viewing on a standard monitor.
HDR Resources
WebSites
http://www.hdrsoft.com/
use coupon code: cccc20 (20% discount to 5/11/09)
http://hdr101.com/?page id=4
http://handbook.outbackphoto.com/section hdr and tonemapping/index.html
http://www.hdrlabs.com/news/index.php
http:Ilstuckincustoms.com/category/musings/
http://www.vanilladays.com/hdr-guide/
http://tonysweet.com
Books
Complete Guide to High Dynamic Range Digital Photography by Ferrell
McCollough (best
book)
HDRI Handbook by Christian Bloch
Mastering HDR Photography by Michael Freeman
Practical HDRI by Jack HowardHDR Handout
CCCC Presentation on Nov 11, 2008; Bob Lott
Thank you for Bob Lott and his HDR presentation to the Chester County Camera
Club, for getting me started on using HDR photography.
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