The OMNI system is a method for placing objects, such as crystals, films, and other translucent substrates, in front of your lens to produce distinct effects. Additionally, by having these objects attached to the front of your lens, instead of hand-holding them, you can achieve more repeatable and predictable results.
The Lensbaby OMNI Creative Filter System is available in two sizes: Large (62-82mm Filter Thread) and Small (49-58mm Filter Thread). Note the thread size of the lenses you are using with the OMNI Creative Filter System to determine which size filter system is compatible.