Anyone tried this variable ND by Hama?

[travellingcello]

As above, has anyone tried this variable ND by Hama?

http://www.amazon.co.uk/Hama-Variable-Neutral-Density-Filter/dp/B005VLI4K6/ref=sr_1_14?ie=UTF8&qid=1336941417&sr=8-14

Its cheap, so the logic is that it will be rubbish but....?

 

[joxang]

I think variable ND filters are generally rubbish. They're basically two polarisers put together - each ND level only works at certain apertures and they're largely unusable at the darkest setting.

 

[odd jim]

Utter crud.