This photo of lichen was taken in my house during January 2012.
The technical information is as follows.
Camera - Canon EOS 5D Mk II
Shutter speed - 1/200
Aperture - f16.0
Lens - Canon EF 100mm f2.8 Macro USM
Focal Length - 100mm
ISO - 100
Canon 580EX II Flash with Snoot and Roscolux Storaro Orange Filter
Canon 420EX Flash with 30° Honeycomb Grid and Roscolux Medium Blue Filter