original is original,
Verified Purchase(What is this?)
This review is from: Nikon SW-13H Diffusion Dome for SB-900 and SB-910 (Accessory)
bought a cheap replacement, it didn't work as it should and gave incorrect focal length info to the speedlight (which changes automatically from wide to normal when attached). Which is why I ordered several, so that the next time I misplace the diffuser cup I won't have to settle for copies.