There is a hidden feature in the Lightroom Details panel that makes sharpening settings much more intuitive.
Its easy to photograph the moon, you just need a long lens and your camera set to spot meter mode.
Using a Hasselblad lens on a Sony a7r gave some really annoying lens flare that requires a significant lens shade to combat.
Many people take the light meter in their DLSR for granted. The light meter still functions, irrespective of what lens you have on your camera.