Sunrise Reflected - HDR Tutorial
Photo © Mike Hendren, 2009
One morning in November, I looked out the window to see what promised to be a gorgeous sunrise. Fortunately, my Nikkor 14-24mm lens was already on my camera, a Nikon D700, so all I had to do was grab the tripod and run out the door. I set up just behind the house and saw the bright clouds reflected in the windows of the house and giving a warm golden glow to the stone work.
One of the primary requirements for good HDR (High Dynamic Range) images is a tripod. Even if the normal exposure could be hand held, you still need to be sure that every image in the bracketed series will line up perfectly. Photomatix Pro, the software I use to process HDR images, can do a decent job of lining up images, but the result is often less than desirable if a tripod was not used - resulting in what appear to be out of focus images.Other important considerations are:
- aperture priority (to have a consistent depth of field),
- auto-ISO off (set the lowest ISO possible to reduce noise in the images),
- and manual focus (to make sure the focal point doesn't change from one image to the next).
- Some also recommend setting the white balance to something other than Auto. I always shoot in RAW, and this has not been an issue. If it were, the white balance of RAW images can always be changed with software.
So, I shot 7 bracketed images with 1EV spacing between each one, at an aperture of f/5.6 and the lens at 14mm.After importing the images into Adobe Lightroom, I immediately exported them to Photomatix Pro. Photomatix default settings usually provide a very good starting point but optimum results will normally require tweaking some of the settings. In this case, I left the strength at 100%, but reduced the Luminosity slightly because the default setting was too bright.Next, I increased the Smoothing setting slightly to get rid of the halo around the house - this is sometimes introduced by HDR processing and can add impact to some images but often results in an unnatural looking effect.Finally, I reduced the Micro-smoothing to zero to retain texture in the clouds and stone work on the house and then saved the image back in to Lightroom for some minor tweaks.The highlights were still a little too bright so I used Lightroom's Highlight Recovery slider to reduce those slightly. I almost always add some Contrast and Clarity - it seems to add a bit of a sharpening effect. Then I normally increase the Vibrance, especially if there is some blue sky, to deepen and darken that sky. Finally, I'll sharpen slightly and and do some noise reduction to make sure the image is as smooth and noise free as possible.Producing HDR images is a lot of fun and can give some added dimension to your portfolio - so give it a try!
