Real estate and architectural photographers are familiar with the challenges of shooting an indoor location during broad daylight. The sunshine pours in through windows, and, without a truckload of studio lights to brighten the space, it's impossible to capture everything your eye sees in a single image. That's where this intro to HDR comes in handy.
Many, if not most, cameras today allow photographers to shoot high dynamic range (HDR) images in-camera. However, the results often leave much to be desired. That's where knowing how to manually achieve HDR results in post-production is helpful in creating the best image possible.
Colin Smith once again delivers a solid, easy-to-digest beginner's tutorial, describing how to use multiple exposures and Photoshop (or Lightroom or Camera Raw) to create all the details your eyes can see in your image. The ability to merge photos into HDR is absolutely essential for aspiring real estate or architectural photographers, but these techniques can be just as important to capturing all the details of a gorgeous sunset landscape or a happily married couple inside the church or reception hall.
Smith notes that a tripod is helpful, but not absolutely necessary to capturing the images needed for rendering an HDR photograph. I'd say some sort of stabilization is necessary if you're planning to make money off your HDR images, even if it's a matter of setting your camera on a table. Certainly a tripod is preferred whenever possible.