I think everyone as their reasons for getting b+w or Hoya or Kenko
If I have the money, I'll get the most expensive filter for my lenses too. But too bad I am not, so hoya is the choice for me.
If I can only afford a $120 canon ef50mm f1.8, then I'll most likely buy a kenko(buying an expensive b+w filter that cost 50% of my lens price doesn't make sense)
If I can afford the canon 50mm f1.4 at $500, then I'll go for Hoya
If I can afford the canon 50mm f1.2L at $2500, then what's a $100 b+w filter right?
Agreed but I think cheap lens like EF50mm F1.8 dun even need a filter if you intention is to protect it coz i think is purely a waste of $ and time, break den throw away lo.