When the sun sets in Chaco Canyon, it lights up the western flank of that sacred, Cretaceous sandstone remnant, Fajada Butte, a fairly spectacular sight all by itself.

Nearly 180 degrees away from Fajada, on the day following the new moon, the Syzygy (new moon) for all you astronomy folks, the moon reappears as a thin crescent, low above the western horizon. To experience both of these lightshows is the conclusion of a Chaco day at its finest.

A focal length of 247mm, medium telephoto-land, gave me some magnification and compression (It was a flat scene already), and the angle-of-view I wanted, with the moon and last bit of color from the setting sun. An aperture of f/16 provided all of the depth-of-field I needed, and a shutter speed of 2.5 seconds at ISO 100 gave me a somewhat darker-than-medium exposure. The fastest shutter speed I could imagine achieving, given the constraints of depth-of-field and camera noise, was about 1/16 second (ISO 400, f/11); and since 1/16th second would not “freeze” the movement of the moon substantially “better” than 2.5 seconds, I chose to reduce the noise in the image by using ISO 100. Exposures are always about problem-solving, and generally there are at least two solutions.

Chaco is sacred space and the BLM continues to threaten the greater Chaco area with new rounds of lease-auctioning which could negatively impact thousand-year-old sandstone walls. Please join in the work to protect this special place.