Interesting post, I've done a little more digging, have a look at the pic from vision dimension and the pic in the link below, they are both the same picture even down to the specs of dust except vision dimensions picture is minus the chines sellers watermark, this makes me think this might be vision dimensions supplier?
http://www.aliexpress.com/item/1-2-3-inch-f2-5-M12-5-4mm-10MP-lens-for-GoPro-camera/1664437568.html
Just a thought....
http://www.aliexpress.com/item/1-2-3-inch-f2-5-M12-5-4mm-10MP-lens-for-GoPro-camera/1664437568.html
Just a thought....