Reflecting on a large telescope

My friends can be seen reflected in the huge secondary mirror at the top of the WIYN telescope. This mirror reflects light that has bounced off the 3.5-m primary mirror back down into the instrumentation area at the bottom of the telescope. My friends were standing on the opposite side of the telescope while I was taking pictures of the secondary and saw them all there. This image was taken at 55mm focal length with an exposure of 1/100 seconds at f/6.3, ISO 800.