The DECam prime focus cage is mounted in the top ring of the Blanco 4-m telescope

With the Blanco 4-m telescope locked in a vertical position and the old prime focus cage removed, the new DECam prime focus cage is bolted in place at the top of the telescope. The new cage is braced by the yellow “strongbacks” and in the picture can be seen being fixed in place using the "spider" legs (two can be identified by the orange and white stripes), and surrounded by the installation team standing on custom work platforms. The installed cage contains some of the largest lenses in the world.