For once I resisted the obvious temptation to go for the more expensive, 'pro' option. That's the hype as far as I'm concerned and we all swallow it hook line and sinker...don't we?
Admittedly, sometimes choosing the cheaper option can be a mistake, but I don't profess to being an expert, or reliant on the product to make me a living. The subtle differences between good and top quality are sometimes so minimal as to be totally lost on the layman. Which is why I went for the cheaper filter, rather than giving in to the blurb.
The difference, as I say, is minimal. Its a UV filter and, as far as I'm concerned, does its job and does it well. It protects my lens and makes a significant difference to the quality of shot. In fact, I'd have to say that this filter and my polariser are probably all I need to produce great pictures.
Good product.