Field-angle versatility of a zoom ellipsoidal – in a compact package. If you’re looking for the field-angle versatility of a zoom ellipsoidal with the affordability and design of a smaller fixture, then you’re looking for the Source Four jr Zoom. Great for application on the small stage or in clubs, retail events and industrials, the Source Four jr Zoom boasts rugged ETC fixture construction and all the celebrated precision optics of a Source Four.