Great Tit Chicks after 20 days

This photo was taken in my garden during May 2011.
The technical information is as follows.
Camera - Canon EOS 5D Mk II
Shutter speed - 1/200
Aperture - f18.0
Lens - Canon EF 50mm f1.8 II plus Kenko 12mm Extension Tube
Focal Length - 50mm
ISO - 200
Marumi DRF14 Macro Ring Flash