The B18-26 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, and a retaining ring for 18 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. 26 mm long.

B18-26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。镜头筒由一个M20.25 RMS螺纹体和一个18毫米直径镜头固定环组成。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。26毫米长。