The Phos Focus Protector.
An all in one screw in lens protector & aperture focus device.
This allow you to set your NVG at infinity when navigating and if you need to read or view something close up you can just twist the device and change your focus point.
Simple easy and effective.
Protection is provided by 2mm thick polycarbonate inbuilt lens.
*We recommend if the protector is heavily impacted to check and if needed replace with new*
*We do not cover any potential damages to devices this is fitted to.*