Richwouldnt
Enlightened
Nitecore makes four 60mm filters for their flashlights, Red, Green, Blue and a Diffuser. I just received two of the 60mm Nitecore filters, their red NFR60 and their diffuser NFD60. Both filters fit BOTH the M6 and the SRK perfectly. They also fit the Fenix TK 50 and TK 60 fine. The main body is soft enough rubber so it fits the 58.6 mm M6 to the almost 62 mm TK60 front bezel quite well. Blue NFB60 and green NFG60 filters are also available. Lenses are plastic rather than glass and are removable from the rubber bodies so other filters could be held. They should also fit other lights with front bezels in the 58mm to 62mm range. The filter itself is 56.75mm in diameter though I expect that any unmounted filter from 56 to 58mm will work fine if installed in the rubber holder.
The Mountain Electronics modified versions of the M6 and SRK lights have added multiple low output levels which are excellent for use with the red filter for minimizing night vision loss when illumination is needed for a night time task.
The Mountain Electronics modified versions of the M6 and SRK lights have added multiple low output levels which are excellent for use with the red filter for minimizing night vision loss when illumination is needed for a night time task.