Dusty glass light fitting at London Zoo.

These little glass bulbs (and many more of them) are suspended over the staircase down to the nocturnal animals section of London Zoo, where we visited last week. I didn't have time to get a really sharp picture as we were keen to move on and see the animals, but I think this photo still represents how lovely they all looked. It was only when zooming in to check sharpness that I realised how dirty the bulbs are (there's a brown layer of dust clinging to each one). I wonder if anyone considered what a nightmare they'd be to clean before installing them!

Camera/lens settings: ISO 400, f/1.8, 1/15s, 35mm, hand held.