content: Very poor build quality... my ring was shaking/rattling... and its extremely prone to attracting dust... gives u decent amount of contrast... probably u get what u pay for i guess....apart from that the biggest problem was the treads are too tight and rough... was a pain putting it on and getting it off my lens...but as i said its really really affordable and give u fair amount of contrast in ur pics... just wish build quality was a bit better.