• Caption: This entire turntable will spin at about 7 RPM while the glass is heated to melt and form the rough shape of the mirror. This spinn-casting technique in unique to the Steward Observatory Mirror lab.
  • Aperture: ƒ/2.8
  • Shutter Speed: 1/25
  • Date: 2/11/11 3:50:25 PM MST