If you shoot a lot on tripods then you should be familiar with Arca Swiss plates.
Traditionally cameras have a screw hole in the base which you attach either a quick release plate or direct to the tripod. Most connections are quite poor. You can buy tripod heads that have the Arca Swiss and dedicated plates to connect to your camera.
This gives a secure connection and quick release ability. I have Arca Swiss feet on my 70-200mm f/2.8 zoom and my 300mm f/2.8 and an Area Swiss plate on the bottom of my Nikon D200, D800, my Hasselblad medium format camera and my Ebony large format cameras.
Really Right Stuff do a range of Arca Swiss compatible tripod heads, and plates, and now I see they do a replacement bottom place for the Leica M. So if your a Landscape shooter who uses the Leica M system for portability this should be on your list of things to look at.