Our Flexible Focus Shaft Extension Kits for Omega and Beseler enlargers make it easier to achieve exact focus when making sizable enlargements by allowing you to adjust focus while your eye level is close to the image or focuser. The standard kit provides about a two foot extension. However, for exceptionally big enlargements, when you need even greater length, this 18" inch extension can be added. Installs easily between handle and flex shaft with just an Allen wrench.