A model displays the 'Panasonic Lumix G1' one day before the opening of the Photokina 2008 World Fair for Imaging in Cologne September 22, 2008. The Lumix G1 eliminates the internal mirror structure that defines digital single-lens reflex (DSLR) cameras, thus reducing the size and weight by nearly half. The Photokina Fair takes place until September 28. [Agencies]