ZWB2 filter for Convoy S12

I know that Simon sells these, but it looks like delivery is out in the middle of December.
Does anyone know of a source for a filter that has better availability? Or just some options.

A 1Lumen review on the S12 showed the glass for the light to be about 30.5 X 2.5 mm. Which is a sort of oddball size.
Searching AE didn’t turn up anything close. Though their search engine leaves a lot to be desired.

If you change the shipping option, it will get to you much faster and if you spend more than $8.23, the faster shipping is free:

Thanks for that!.

I also ordered the S12, somehow the items were separated. I also ordered an S2+ and filter on the same order. Same thing, December 24th delivery. I wrote to Simon asking him if he would combine them. We will see. But I still would like to find an additional source for the filter.

There’s a stupid patent (for the US?) that prevents the lights being sold with glass attached. Enjoy your light when it arrives

I get it. I have read about that problem. But I ordered the filters as individual items, not attached.

THX for the reply

Well I got shipping notifications for everything. Simon shipped both lights and filters in the same order. Great,
Still would like to find an additional source for the filters.

Thanks for the replies so far!

I’ve recently ordered an 18mm filter for a build I have planned. AliExpress has a bunch of stores with ZWB2 but they’re all more expensive than Convoy (which didn’t offer the dimensions I wanted).

Place I’ve ordered from is called RY Optical Instrument Store.

I use the AliX app and I find the search function to be lacking, I’ll often click on the closest item I need then scroll down to “recommendations” and click on a product that’s similar to my needs. Do this a few times and the recommendations get closer to what you require.

I tried Kaidomain but couldn’t find anything.

Between AliX and Kaidomain, I’m not sure of any other places to buy from nowadays. Fast tech was good for this kind of stuff but they’ve shut down.

eBay used to have a bunch of ZWB filters but now the UK site has almost nothing, and those it does have are more expensive than AliX.

Edit to add: I didn’t make it obvious that the filter has not yet arrived, so I can’t comment on quality/authenticity/etc

2 Thanks

Related question:
How would one test a ZWB2 filter to assure it’s really filtering the undesired wavelengths while allowing the light centered around 365nm through?

slmjim

Thanks for the answer! I did a fair amount of searching on AE and just general Googling. There are lots of ZWB2 filters out there. This size that the S12 uses is just not one that I found I think Convoy lists it as 30.8X2.5 mm. Even allowing +/- 1.mm on the diameter, I didn’t find anything. Oh well… As I said, it appears that Simon sent the two lights and the filters in a single shipment. So at least I will have them at the same time. Plus, I assume I will get some good filters.

I have a couple of other lights I am considering modding to UV, so a different source would be good. I will check RY.

THX again.

1 Thank

Great question. I guess proper way is to measure the output.

Homebrew method would be find something excited by 365nm but not by 395+. Could benchmark a known emitter then test different glass and compare? I like the djozz method of UV tests- making uranium glass fluoresce then measure the visible lumens from that.

Would be hard to differentiate the ZWB1/2/3 but I’d hope there’s enough to give you an idea if you’ve just been sent purple glass… Will be something to add to my pondering list …

Try this link to AliExpress for 30.8mm diameter ZWB2 filter. Sold by Convoy.

The AliExpress search function is horrible. I think it’s designed to push highest profit Vs what you actually want.

Not linked to AliX before, let me know if it works.

Yes, that is the one I ended up ordering. But the delivery date showed December 25th. So I was looking for alternatives.
I got in touch with Simon and he packaged the filter(s) with a couple of UV lights that I bought. So now I will get the filters and the lights at the same time. Sometime in the middle of November (or maybe sooner). So it worked out.

But I do thank you for taking the time to track this down.

1 Thank

Ah apologies I get it now!

Didn’t take me long to find it, all my recommendations on AX are currently ZWB2 filters from when I was looking for a weird dimension (17mm ish). Sellers either have drop-down menus for different sizes (convenient) or individual listings for each size (less convenient).

It’s a shame convoy or Kaidomain doesn’t stock a bunch of different sizes and have a simple dropdown menu. If someone did this, I’d have ordered a couple of different lenses and used the one that fitted best. Rest could be sold on eBay or donated on here or sit in parts bin waiting for next UV project.

If it all comes together, I’ll end up posting results in “what did you mod today”.

1 Thank