Shooting Digital Infrared with Filters
The following images were captured while I was making photographs for my book “Complete Guide to Digital Infrared Photography” that’s available at your favorite bookseller and Amazon.com. While I used many different kinds of cameras, including Canon and Olympus, to capture IR images for the book these examples were made using a Pentax K100D digital SLR.
This photograph (left) was just one of a few images that I was able to make before the wind picked up and wiped the reflection from the lake. Photo was made with a Pentax K100D and SMC P-DA 50-200mm f/4.0-5.6 ED lens at 80mm and mounted on a solid tripod. Exposure in Manual Mode was one-half second at f/9.5 at ISO 800. Filter used was the Singh-Ray I-Ray Infrared Filter. ©2011 Joe Farace
With the proper filter you can capture near infrared images such as this one (below) that was made near Arches National Park. Exposure was one second at f/9.5 at ISO 800 with the camera and SMC P-DA 50-200mm F4-5.6 ED lens mounted on a steady Titltall tripod. Image was converted to monochrome in-camera—but not at time of capture—using the Black & White Digital Filter found in the K100D’s Playback menu ©2011 Joe Farace
The Pentax K100D has hidden capabilities to capture monochrome Infrared photographs; all you need is the right filter to unlock it. The photo (right) was made in Manual mode with an exposure of one second at f/9.5 at ISO 800. The camera was on a tripod. These long exposures are required because IR filters are almost black so they filter all visible light, allowing only invisible (IR) light to pass through. Filter was a Singh-Ray I-Ray. The initial image as captured has an overall magenta cast, so the first step is to it turn it into Monochrome using Photoshop’s Desaturate (Image > Adjustments > Desaturate) command. After that a little contrast boost will do it. If you want to get fancy, as I did with this image, you can create an Adjustment Layer-Curves and use it to tweak parts of the image’s contrast curve. ©2012 Joe Farace