I just gave this info to Karen from Gearbest to see if they could start carrying this. With the new Convoy S2+ being released soon, this would be a popular and inexpensive item. Maybe twice the cost of a 20mm AR lens ? Banggood also has been given the info a while back.
An affordable filter and the new Convoy S2+ with Nichia UV would be a great combination. Banggood should include one for free with every one of those old stock Convoy S2 with Chinese UV emitter. If they don’t, they will never get rid of them after Simon releases his new UV lights. Convoy S2 365nm UV Single/3/7 Modes SMO Reflector LED Flashlight
AA size almost always is 18mm. I have a 15mm ZWB2 filter and found just one flashlight in which it fits (an ancient and badly built Romisen) Most AAA flashlights need a 12mm filter which I did not find anywhere, and the 10mm filter that I ordered 2 of (but received just one ) fits in hardly anythinh, but it does fit the Singfire (BLF) 348, which should make a slick little 365nm light.
need one around 700mm for a snapon uv leak tracer.and to mod it to led.heat from the halogen cracked this ones lense.
i assume these are just woods glass?