zoom on z's pic (1775/1776):
1774: zoom on truck entrance
1773: zoom on truck entrance small
1772: Zoom on smoke at 1
1771: zoom on pour
1770: zoom on pour small
1769: Zoom on pipe
1768: zoom on No 4 north wall
1767: Zoom on N wall of 4 4th floor
1766: Zoom on corner S wall of 4
1765: zoom on boom
1776: zoom
