Lensbaby Step-up Shade - 37mm to 52mm Step-Up Ring/Lens Shade Combo Combination Step-Up ring and Lens Shade 37mm threads in back to mount to all Lenababy optics except the Fisheye optic 52mm threads in front to mout 52mm filters Shade features internal grooves that trap stray light and significantly minimze flare Specially designed to work with the Lensbaby Composer focus ring and recessed optics