Generic Brand Step Up Rings For Filters
During my workshops and tuition sessions I often suggest that you buy one size of filter, usually 77mm. This in theory enables you to purchase only one of each high quality filter of your choice. So you might need a Circular Polarising filter, a Neutral Density filter, a Diopter close up filter or maybe a clear filter. If you buy one of each in 77mm and use step up rings they will fit every lens you own now and into the future. Thereby saving you money, weight and if you look after the filters they will last a lifetime regardless of what lens you use.
When you want to use a filter on a lens with a smaller filter thread size, you use the step up ring to attach the filter to what lens you choose. A step up filter ring is a simple glassless ring with a male thread for your lens and larger size female thread for your filter. The step up ring screws onto your lens and the filter screws onto the step up ring.
A downside of step up rings and larger filters is that they interfere with using the standard lens hood supplied with the lens. This can be easily solved by buying a collapsible rubber hood with a 77mm screw in thread and using this with your filters or shade the lens with you hat, hand, when necessary.
These are a cheaper version than I would normally recommend but they will last for the occasional user. If you would like something of a higher quality check out the B+W brand listing.