The Chauvet Professional OHDLENS5 5 Degree Ovation Ellipsoidal HD Lens Tube is a fixed focal length lens tube for Ovation ellipsoidal fixtures. It is designed to fit all ellipsoidal fixtures as well as other standard ERS-style fixtures. Dual aspheric lenses provide precise focus for crisp gobo projection. An integrated gel frame holder and included gel frame support fixture setup.