The Brilliant² Tray Mount Close-Up Lenses fit directly in 4"x5.65" matte boxes. The +1/4, +1/2 and +1 diopter strengths fit in 1 matte box slot. The +2 strength uses 2 slots in the matte box. The +3 diopter strength uses three matte box slots. The permanently mounted 138mm Close-Up Lenses provide a 5.1 inch clear aperture for use even with large diameter wide angle and zoom lenses
