The B12.7 Lens Mount Barrel can be used to create optical systems by mounting it to X26 Rails and Carriers via SB or CB Series Lens Barrel Holders. The lens barrels consist of a M20.25 RMS threaded body for mounting into B18 Series Lens Mount Barrels, and a retaining ring for 12.7 mm diameter lenses. When screwed together, the lens is securely held in place. For thick lenses, the retaining ring is reversible. Two or more lens barrels can be threaded end-to-end to construct simple optical systems. Several accessories are provided to assist in creating optical systems.

B12.7透镜安装筒通过SB或CB系列透镜筒支架安装到X26导轨和载体上，可用于创建光学系统。镜头筒体由M20.25 RMS螺纹阀体组成，用于安装到B18系列镜头筒体，以及用于12.7 mm直径镜头的固定环。当拧在一起时，镜头牢牢地固定在适当的位置。对于厚镜片，固定环是可逆的。两个或更多的镜头桶可以螺纹端到端，以构建简单的光学系统。提供了几个附件以协助创建光学系统。