If it's anything like my 20D I'd suggest that you read and reread the manual and get very familiar with the controls and menus. When you change lenses, do so with the lens pointing to the ground to minimise the chance of dust getting into the camera and finding it's way on to the sensor. If you haven't already got one, get a remote release. I don't know how much clearance the LX200 has but I bought a shorty adapter from Scopestuff in the US which allows the EOS to clear the forks at all elevations. I believe there is a Baader one that is even shorter.
