I use a Kenko CP on my 10-20 and seems fine to me
Bought mine s/hand from the TP classifieds, but have seen them for about 35-40 quid
Genuine ones have Japanese writing (not Chinese) on the case, they are allegedly made in the same factory as Hoya as they both belong to the same company THk who also own Tokina
Which c-pol for around £40, budget is tight, looking for a 77mm for my sigma 10-20mm
