The couple's intent demeanor, as they sit in front of one of Mr. Hockney's landscape paintings on an easel, is compounded by the fact that the Brandts are watching their own portrait being made, that Mr. Hockney is watching them, and that we are watching the lot of them.

WSJ: The Polaroid SX-70 as Sexy Tech | Frances Lehman Loeb Art Center | By Richard B. Woodward