C-cs Adapter Rings

Our range of C-CS Adapter Rings, also called C or CS Lens Extension Rings, are used to adjust the distance between objective lens and image sensor. Because different camera has its own specified mount height, which is different from the Back Focal Length of an objective lens, this series of extension rings can help the lenses get the best focusing point on the image sensor and form the clear image.
All the extension rings have the same screw size for C and CS mount. Sizes include 0.5mm, 1.0mm, 2mm, 5mm, 10mm, 20mm and 40mm thickness for option.