Tiffen 7782SUR 77 to 82 Step Up Ring

Tiffen's 7782SUR is a larger format filter accessory - a 77 to 82 Step Up Ring. With this step up ring it will allow you to accomodate 82mm filters, lenes or accessories to a 77mm lens. A step up ring allows you to adapt a filter or lens accessory with smaller thread sizes to lenses with larger thread sizes.

If you need to do the reverse - Tiffen offers a series of step down rings which acheive the oppositve effect (allowing you to mount filters / accessories that are smaller than your larger lens.) Remember - try to avoid using more than a two-size difference step down ring as lens vignetting may occur.