30-37mm Step-Up SLR Lens Metal Adapter Ring

Using Step Up And Step Down Rings To Take Better Pictures What is a step up ring Step up rings, also known as adaptor rings, allow you to use filters and accessories that are not the same size as your cameras lens. Fortunately there is a step up or step down filter for just about any need. How step up rings work Step up rings provide a way to fit a larger diameter filter or accessory onto a smaller lens. The step up rings screws onto your lenses threading and provided a larger thread with with you can then attach other elements included more step up rings. How step down rings work Step down rings work in the exact same way but instead provide a way to attach smaller accessories and filters to larger lenses. It is always best to look for the thinnest adaptor ring that you can find as these will keep the filter close to the lens. Step up rings provide a way to fit a larger diameter filter or accessory onto a smaller lens. SIZE COMPLETELY: you can choose any size you want. HOW TO USE: the first number is male thread and the second number is female thread