The Opteka flash diffuser creates a diffused bare bulb, making it possible coverage of the entire structure, with lenses from 35mm to 200mm in the 15mm format (and equal in other formats as well). Speaker Opteka is easy to use and goes on and off the flash in seconds with custom fitting and no curfew touch. Designed for years of service, without the majority of some other speakers, small enough to fit comfortably in a purse or pocket gadget.