I went to the Tool specialists here in newcastle and had a look at the welding protection lenses and there were packs of 5 (I think) starting at about $17 and going to high 20`s. They looked wide enough for my 12-24 (77mm) but there were varying degrees of darkness (I presume) and thicknesses. Unsure which ones to get to have a play with. For those who have given ideas on the similar thread a week ago or so and who have bought one recently, I would appreciate some advice. Thanks in advance.....