I use Canon EOS cameras and originally I tried to stick with lenses that took 77mm filters. That worked for a while until I started lusting after a Tilt Shift lens and got myself a Canon TS-E 24mm lens which has a 72mm filter thread. I really don't want to buy 72mm filters.K&F CONCEPT to the rescue!This pair of adapters rings (I got 72mm to 77mm) are packaged just like you would expect a fancy modern high end filter to be packaged. It's just as good as an expensive Circular Polarizer that I got recently. There is a smart outer cardboard box and then inside is a nice hinged filter box which each of the rings individually cellophane envelopes.A ring like this is a tiny thing that you have to squint at closely to inspect. But when you do you that, you realize that these rings are very beautiful indeed. I mounted a ring on my Tilt Shift lens and the 72mm thread was super silky smooth and could not possibly be any better. Then I when I fitted the 77mm filter to it, that 77mm thread was just as gorgeous silky smooth as well. On top of that the weight of each ring is very very light. I bet they weigh less than your lens cleaning cloth. So there is no reason to not put them in your camera bag. They might be the lightest camera accessory of all time. Fabulous!There is something about cameras and lenses, especially from the highly respected makers, that highlights how beautiful engineering can elicit a visceral and tactile love of machine in us the users. Sometimes I find myself caressing my camera body it is so lovely. And these rings from K&F CONCEPT slot into that aesthetic without even trying. They have an understated but very classy loveliness about them that any camera addict could not help but love.Totally amazing and highly recommended!