There are two photos here.
The first is a higher-res version of the Foveon portrait on the isen.com home page.
The second is a slightly older one that I took myself in my back yard.
Either may be used to support or supplement the work of David S. Isenberg without further permission.

(Note: To download either picture from any browser, right-click on picture and select Save [Picture, Image, etc.] As . . .)