Last year we went to an exhibition of installation artists called “Wonder” at the Renwick Gallery in Washington, DC.  Several artists made very interesting pieces for this show.  Using hundreds of thousands of pieces of reclaimed, old-growth cedar, John Grade built an intricate structure – Middle Fork – based on plaster casts taken of a massive, old-grown hemlock tree in the Cascade Mountains.  At Wonder, I shot cha-cha’s with my Sigma DP1-M and a Sputnik.  Tripods were not allowed, but I was incredibly lucky: each room in the Renwick had a fairly broad chair rail along the wall, wide enough to give good support to the Spud.  The exposures were typically 15 to 30 seconds.