I decided to build the cradle in two parts. After taking measurements from my camera and lens, I cut the lens support (R) and backboard (L) from pieces of whatever passes for white pine these days, using a jigsaw. For the base, I used a piece of thin (less than 1/4") plywood scrap I had left from the interior of the shed project. I attached the pine pieces to the plywood using glue and screws.