The computar VM100 Extension Tube Kit attaches between a CS-mount camera and C-mount lens to reduce minimum focusing distance, enabling you to focus in on an object from closer than the lens would normally allow.
The kit consists of six barrels and metal spacers that you can use individually or in combination to achieve different minimum focusing distances. These six components are each of a different length, measuring 0.5mm, 1mm, 5mm, 10mm, 20mm, and 40mm, each affording a different minimum focusing distance.
