This is a dedicated 36 Degree interchangeable lens for the Nanlite PJ-BM Projection Attachment (which is sold separately). This lens provides a tight beam that adapts to shooting in smaller spaces, and it increases the light output. While the additional output is a huge bonus, the biggest benefits are the endless creative possibilities it provides. The Ultimate Light Shaping Tool Lighting a shoot is incredibly creative to begin with, but when you add the PJ-BM projector mount and this lens, the potential is unmatched.Create eye-catching textured backgrounds, razor-sharp spot effects, and anything else you can dream up. Ready For Small Spaces The 36 Degree lens provides a tight beam, but it's wide enough to be used in small spaces. It's capable of covering large areas of a wall in a small room with either out-of-focus textures, or projections with sharply defined edges. Durable Aluminum Construction This lens and the compatible projection attachment (sold separately) feature a durable aluminum construction that stands up to the rigors of production work.Swapping Lenses is Easy Removing the current projection lens and swapping it for another is accomplished by removing a single screw. It only takes a few seconds and doesn't require any tools.The Ultimate Light Shaping ToolLighting a shoot is incredibly creative to begin with, but when you add this lens and the required projection attachment, the potential is unmatched; Create eye-catching textured backgrounds, razor-sharp spot effects, and anything else you can dream up.Ready For Small SpacesThis 36 Degree lens provides a tight beam, but it's wide enough to be used in tight spaces, it can cover large areas of a wall in a small room with either out-of-focus textures, or projections with sharply defined edges.