M12x0.5mm Board Lens Extension Rings

M12x0.5mm Extension Ring is a type of Aluminum screw rings, with M12x0.5mm screw thread in the inner barrel to be screwed between the M12 Board Lens and lens holder. When a board lens has longer back focal length, which make the lens can not be fully screwed into the lens mount to get the clear image, this series of extension rings can fix the lens and keep the focusing point correctly on the image sensor, to avoid the lens shaking during the operation.

Different sizes for choice, including 1mm, 2.5mm and 4mm height.

C-CS Adapter Rings, Lens Extension Rings

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.