good deal for a 340nm bandpass filter on eBay

[Fandyus]

https://www.ebay.com/itm/265176732933

It looks pretty beaten up but the seller doesn't mention any damage to the filter itself. Really cheap too. I am currently saving for some more Tangsinuo glass so I won't be buying it but I figured some of you may be interested.

Cheers.

[Andy Perrin]

gone

[Fandyus]

Well they still have this one https://www.ebay.com/itm/265233002825 at least

[Andy Perrin]

I guess, but at 12.5mm, that's going to be hard one to actually use! Might be better for making a torch filter or something, if you wanted a 380mm penlight for example.

[Fandyus]

2 hours ago, Andy Perrin said:

I guess, but at 12.5mm, that's going to be hard one to actually use! Might be better for making a torch filter or something, if you wanted a 380mm penlight for example.

for sure, I mean it has less use than the 340. I'd probably rather just buy a 380nm LED chip. I think I own one in fact. It's just been sitting in my drawer in its original packaging since I haven't gotten to mounting it yet.

[Andy Perrin]

Actually, you know what this would be good for? Sparticle array.