I know, I'm a cheapskate, but I am wondering what loss I'll have by putting a 82-77mm step-down ring on my 90mm f/5.6 Super Angulon for when I need to use a filter. All of my other lenses have been standardized to 77mm filter rings so I have a set of filters in this size only. This would only be for use when I need a filter and will be using a 82mm hood on the lens when a filter isn't needed.

Is it possible to put a step-up ring on the back filter ring from whatever it is (I don't know) to 77mm and put my filters back there instead of on the front and just use the hood on the front?