Figure 3-12Secondary Mirror of a Reflecting Telescope Does Not Create a Hole in the Image Because the light rays from distant objects are parallel, light from the entire object (in this case, the crescent Moon) reflects off all parts of the primary mirror. Therefore, every part of the object sends photons to the eyepiece. This figure shows the reconstruction of the entire crescent Moon from light passing through just part of this telescope. The same drawing applies everywhere on the primary mirror that is not blocked by the secondary mirror.