CS to C mount adapter, which can also be used as a macro ring to allow lenses to focus closer. When you use the adapter together with C mount spacers 1mm (link to item) or 2mm (link to item), you will get more room for back focus adjustment of the Chronos camera.

Note: Every Chronos high-speed camera comes with one CS to C mount lens adapter. Our Chronos cameras are natively a CS mount, so this adapter is essential for using C mount lenses with our cameras.