So I bought a bunch of new filters. A circular polarizer. A variable neutral density. A 2-stop graduated neutral density. All are 77mm in size. I would always keep a 35mm kit. Been keeping in touch with Nikon D600 rumours. Sorry no Canon for me. Nikon CLS is just magical. Then I looked at step up rings. Ouch. I'm going to need a 52-77mm, a 58-77mm. For sure. But how do you guys feel about step ups from 37mm and 46mm? Should I get them to step up to 52mm, or 58mm? Cause 37-77mm and 46-77mm doesn't exist.