Comments about Kenko Adorama Step-Up Adapter Ring 62mm Lens to 82mm Filter Size:
Following the thrifty rule of buying a filter for my largest lens, and adapting the others up to that. In my case, adding a variable ND filter (Genus) to my Sigma 20mm f1.8 at 82mm diameter, and using it on my Sigma 30mm f1.4 as well. This also tends to use the "sweet spot" of the filter, as most vignetting occurs at the outside edge. Clean, anodized, aluminum design; in a rare size for a poor man's budget. Thanks Adorama...ML