I noticed this Hoya HD is not readily available in the shops. In fact both OP and TK are pushing for Kenko Zeta. While I know Tokina, Kenko and Hoya are basically the same company. As for Hoya HD and Kenko Zeta filters, they said that Hoya HD is for export while Kenko Zeta is for JDM. Any truth in this? (1)
Anyway, I don't have a Hoya HD on hand to compare. They also say that the rim thickness is the same (2). After buying then I realised that the Kenko Zeta and B+W F-Pro are about the same thickness (which means not as slim as Hoya HD).
Last point to note is that they also said that upon impact, it is better for the filter to take the impact and break. Else the shock will be transferred to the inner lens. This seems a logical point of view. So does that mean all the hype about Hoya HD being unbreakable seems to be flaw now? (3)
Anyone can debunk the myth from the facts? (1,2,3)