August 2009: CO-ODE has now officially finished
You should still find most of what you are looking for on the site.
But also see here for ongoing OWL work @ Manchester

Photography ontology

An ontology of camera equipment and principles of photography

Browse photography.owl online using ontology browser.

Download photography.owl (an OWL 2 ontology in RDF/XML)

2010 update: Ongoing work on the photography ontology