> Surely it would work on rock carvings too? Though whether you could also then take a > photo I don't know.
What I may try is using a directional flash on it one night.... worked a treat on the Dobrudden Stone. Whenever I go anywhere near the Barmishaw Stone, the skys cloud over. Tried sneaking up on it from all directions! Think there's some genius loci having a right laff at my expense!