This picture shows a Bramble leaf which has been eaten from within by the growing larva of a leaf-mining micro-moth, leaving a white trail in the otherwise green (and still functioning) leaf. The smallest end of the 'mine' (near upper part of leaf) marks where the egg was deposited by the adult moth.
Photographed with a hand-held Nikkormat Ftn camera with 50mm Nikkor lens and extension tube, lit by twin manual flash on home-made bracket, at 1/125th sec and f16, on Kodachrome 25 film processed normally. No filters used.
Hampshire, England, July.
Notes: Manual flash