In December we had a great chance to test the M600 Pro system with a terrain following module in sunny Peru!
In general, SF11/C works perfectly. There was one annoying issue: under extremely bright sun over some surfaces it can miss readings for a long time. Fortunately, a solution was found quickly: during the trials we used improvised lens hood.
.. from short distance:
These altimeters are quite popular in the industry and among DIYers, so be warned if you use them to fly over very low altitudes.
Now we use modified holder for standard lens hood for Nicon lenses, but any similar ones should work as well.
I must say that Peru is a very interesting place in many ways. Especially the rich history of the Incas and earlier settlers, the ruins and other remains of their civilisation. As one of our hosts put it, “you can dig in any place in Peru and will probably unearth some ancient debris”. A lot of artefacts and skulls were lying just like that in the middle of the desert where we were testing our system..