Kase 58-77mm Magnetic Step-Up Adapter Ring for Kase Revolution Magnetic Filters NoLongerAvailable Front and back zippered pockets

Front and back zippered pockets

together as he braves this new world

Ten Part Invention

So you can  have balanced recordings without the need for manual adjustments

then the calculator can be used to find the values of a and b

Kase 58-77mm Magnetic Step-Up Adapter Ring for Kase Revolution Magnetic Filters NoLongerAvailable Front and back zippered pocketsThis steel made 58 to 77mm Magnetic Step Up Ring allows you to magnetically attach Kase Revolution magnetic filters to compatible lenses. The step up ring screws onto lenses that have a 58mm front filter thread, and your 77mm Revolution filter then magnetically attaches onto the ring and is just as easily removed. Features Allows Kase Revolution Magnetic Filters with 77mm Lens Adapter Rings to Be Used on Lenses with 58mm Front Filter Threads