I somehow came upon a photo group on flickr called HDR. HDR stands for High Dynamic Range and it’s a kind of photograph that accomodates for infinite precision in tone levels. Of course, infinite is not really achievable o n a computer so with my tools that works out to be 32-bits per pixel per color channel. Yes, that’s 96-bits per pixel instead of the standard 24 you get with a typical JPG.
Camera’s generally can’t capture so many tonal levels directly. Pro and Prosumer cameras can shoot RAW images, which yields images with a better color depth than the standard 8-bits-per-channel you’ll get with a simple point and shoot camera. RAW files usually contain 12 or 16-bits of color information per channel.
To capture the right number of levels, at least with my equipment, you need to create a composite image from photos taken at varying exposures.

To create that image, I stuck my camera on a tripod and took 3 photos. One at EV -2, one at metered EV, and one at EV +2. This yielded 3 images like so:



Being a novice, the first thing I took note of was my ability to see the chair in the adjacent room and the clock that’s sitting on a shelf at the bottom of the night-stand. I can see it clearly in the HDR photo and I still have good tones in the highlights of the chair. Essentially, I don’t have an uneven distribution of tone, either too bright or too dark. I get good tone levels across the whole image.
Photoshop does all of this magic for me! All I need to do is point it at the 3 RAW files and it automatically stitches them together and gives me the option of how I want to distribute the tones. It does this through a slider… a slider which I need to learn more about.
When I save my image to a standard JPG, I obviously lose 32-bit per channel color. At this time I am presented with another slider that allows me to adjust exposure and gamma. I made one more tweak and voila, I have my very first HDR photo. Here are some HDR photos you can find on flickr. Some of them are amazing!



Unless your camera can capture the images very quickly, which mine can’t, I’ll be forced to take picture of still life.