Kitt Peak by Night

A five hour long exposure of the 2.3 and 4 meter telescopes atop Kitt Peak National Observatory near Tucson. Actually this is a composite of 545 seperate 30 seconds exposures taken last night from that venue. Moonlight from the first quater moon illuminated the domes for half of the sequence hence the "daylight" appearence of the the buildlings. Brake lights from cars headed down the moutain after the nightly public evening illuminated the 2.3 building during a few of the exposures giving that telescope a red highlight. Details: Canon EOS 1D | Canon 24-70mm F/2.8 L lens at 24mm | 545 x 30 seconds @ F/3.2 | ISO 1000