This pair of digital photograms shows capillarity, or capillar action, in a leaf. The version above has had the LAB Color channels inverted.

The behind-the-scenes tool that makes work like this possible for me is my new Mac Pro with four (count them, four!) Intel Xeon processors, and a thirty inch monitor. The monitor gives me the ability to see my images at close to 100% when I work on them, and the Mac Pro gives me the power I need to drive my image processing. This is the system that every digital photographer should have!

Capillarity II

View this photogram larger.

Posted in Photograms, Photography, Photoshop Techniques


This is a fairly straight studio shot taken with my Sigma 50mm Macro lens of gladiolas in a vase. I converted it to LAB Color in Photoshop, and then inverted the Luminosity (L) channel (by making sure only the L channel was selected in the Channels palette, and choosing Image > Adjustments > Invert). This essentially had the impact of turning the seamless white background to black without changing the other color values in the image.

Posted in Flowers, Photography, Photoshop Techniques


Three generations went hiking together over Labor Day weekend. Shown on the Estoro Trail on Point Reyes from left to right: Harold (me!), Julian (my son), Virginia (my mom), and Peter (my nephew).

Posted in Hiking, Kids