B+W 77-82mm Step-Up Ring Sensei SDR-6252 but if you want to

but if you want to access the microUSB port on something

The modeling lamp comes on to confirm the flash has been triggered and goes off when recycling

four status LEDs

Rated at 20pF capacitance and +/- 50ppm stability

B+W 77-82mm Step-Up Ring Sensei SDR-6252 but if you want toUse 82mm Filters on 77mm Lens Knurled Sides for Firmer Grip Anodized Aluminum Construction The B+W 77 82mm Step Up Ring permits the use of 82mm threaded filters on lenses with 77mm filter threads. It features a lightweight, aluminum alloy construction that has a corrosion resistant, black anodized finish for durability. This step up ring has side knurlings to provide a more textured grip when mounting or removing it from a lens. Size 77 82 mm