Noticed interesting thing….
Here is a lens sold by LHT Flashlight Store.
LHT Flashlight Store claims it’s from Yajiamei, but Yajiamei doesn’t offer it in their store.
It appears that Kaidomain offers exactly the same lens
Or maybe one store took pics from the other. 
Does KD buy their lenses from Yajiamei?
Did anyone compare LHT Flashlight Store lenses to the KD ones?
As far as I know, LHT and HD are the same store (at least they sell the same things)!
Yajimei store is mostly dedicated to TIRs and other optics, not “regular lenses”, if I recall correctly!
BTW, the first link doesn’t work, to the product you mention :zipper_mouth_face:
Oh, it indeed seems like Kaidomain’s Ali store. This gives them some extra credibility. I think I’ll just ask Yajiamei whether they are the supplier.
I fixed the link.
I bought some things from them, a while ago, and never have significant issue. When I had them, it was solved, the store communicated with me and we reached an agreement (due to parts out of stock)!
About the lens being made by Yajiamei, I can be sure about that! Maybe on KD thread (by ChibiM) you can find any information about that lens.
One thing I must say is that it used to take a while to get things shipped, but all reached my home without issues :+1:
I suspect Yajiamei doesn’t make it’s product. It’s more like an upper stream “distributor”. Yajiamei is one of few AE seller with a well organized store. And the best thing about Yajiamei is: most of the product description includes technical drawing. But you’ll notice the same slogan keeps repeating over and over again in almost all item’s description:
Effectively overcome some of the LED spot yellow halo phenomenon, soft lighting, spot uniformity, no stray light, no black hole, no shadows or dark areas
Cheers,
Clemence
Now that’s an interesting observation.
I searched the net for the phrase. It showed up on a kinglens site:
http://www.klglasslens.com/led-lens-relfector/30mm-glass-led-reflector-lens.html
on ebay:
https://www.ebay.com/itm/50pcs-led-lens-for-5050smd-30-60-120-degree-convex-optical-lens-GX-/223176849282?oid=232787243306
on Shopee Thailand:
https://shopee.co.th/เลนส์สะท้อนแสง-bmth-LED~~สำหรับ-5050smd-180~~องศา-i.74569472.1243929947
on dhgate:
on another Ali store:
https://www.aliexpress.com/item/High-power-LED-lens-diameter-38mm-Bead-surface-Plastic-Plano-Convex-lens-led-optical-lens-Led/32814421465.html
on Veritren:
https://veritren.com/products/xmlxml2-lens-diameter-23-3mm-stripes-1065-degree-t5t6u2-led-lens-with-stand-5050-lens/
I wonder if they all just copy descriptions around….