The LT20-30 Lens Tube provides a means to mount multiple lenses into a single holder. The 3 inch (76.2 mm) long lens tube has an internal thread on one end and a mating external thread on the other. This allows them to be connected together end-to-end to provide endless configurations. 2 inch (50.8 mm) diameter lenses are held in place with threaded retaining rings. One retaining ring is included with each lens tube.


LT20-30镜头管提供了一种方法,安装多个镜头到一个单一的持有人。3英寸(76.2毫米)长的透镜管一端有内螺纹,另一端有配套的外螺纹。这允许它们端到端连接在一起,提供无穷无尽的配置。直径2英寸(50.8毫米)的镜片用螺纹固定环固定。每个透镜管都有一个固定环。