I have a Nikon mount 28mm 2.8. My best guess is it's made by Miida, and it is made in Japan. Glass is good, and the blades look decent, but there is one issue: the nose piece is missing, along with the name ring. There is a 2% chance it's a 24mm, but it seems to have the same AOV as my Canon 28mm, so I'm pretty sure it's a 28mm. If you're at all interested, PM me.