I need a 67-77mm step up ring. I was about to get a Cokin one off Amazon, when I noticed a review saying that it was plastic. Doesn't sound good to me. Anyone got a plastic one? Are they strong enough? Suprises me that a small bit of metal can cost so much. That and the price of filters is a big downside of todays large front elements. Oooo, back when I were a lad, it were 52mm 'cross the board. Stacks and stacks of filters I had. An' I were a poor lowly student too. I'll be bloody poor after just a couple of 77m buggers.