Nice review djozz. It just seems like it was last week when we were talking about this filter. It’s nice to know that it can filter out that visible light from the RP-3535 and the LED ENGIN.
After looking around I found another store with a good deal. Is 3mm too thick? Too bad it’s not 1.5 or 2mm.
A few days ago two 15mmx2mm diameterxthickness ZWB2 filters arrived. When I ordered them I did not know of a host yet with 15mm lens, and there appear very few of them! Today I rembered I had an old Romisen AAA RC-F7 (build quality=crap) with a blown switch that might be the right size. Took me half an hour to find it in my rubbish and indeed the lens diameter was 15mm. Managed to repair the switch and mod the light with a led4power 365nm led and ZWB2 filter. Used an ordinary 14mm aluminium MCPCB that I had around and the stock 1 mode little boost driver. It draws 700mA from a partly drained Duracell alkaline AAA, so there's maybe 150mA current leftover through the led. But it works fine, perhaps 1/5th the output of the BLF-A6 that I modded with the same led at 700mA led-current and 20mm ZWB2 filter, best light I have ever seen for banknotes and it is even a bit throwy because of the small die :-)
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