MarkB writes –
“Often I need to level my camera. For example, I always need to do this when stitching together panoramas by panning the camera between shots. It is a bit awkward with my 120S camera because the top of the camera is not quite flat front-to-back, so I could not just stick on one of those circular spirit levels. I have a small spirit level that I carry in my pocket and in the past have used it on the bottom of the camera when leveling. But it is not very convenient.
So I decided to install spirit levels on the body, on 2 sides so I can level side-to-side, and front-to-back. The method I developed might be useful to others, so here is a quick “how to” guide.” – Link.