Having a problem? The filter has a different diameter and you still want to use it to achieve the effect you've been waiting for so long? Step-Up adapter ring allows you to use larger size filters on lenses with a smaller diameter thread. The first number is the size that screws into the lens， the second number is the filter size. With this filters adapter ring， it is not a problem at all. It will be a great way to enhance your photographic experience.                                    Features            46mm - 55mm step up lens filters adapter ringA step up ring used to adapt a filter to a lens when the two have different filter thread diametersConvert the camera lens filter size of your lensThe lens adapter is perfect way to use all filter sizes without buying new filtersUseful and helpful gear for you to save moneyStep up ring is used for attaching larger filters to smaller lensesA must have for the serious photographerMale Thread: 46mmFemale Thread: 55mmColor: BlackMaterial: MetalDimensions: 2.24 x 0.24 inch / 5.7 x 0.6 cm (Diameter x H)<br>                                                                                                Package Includes            1 x 46-55mm Step Up Filter Ring Adapter<br>                                                            Extra Info            Compatibility: Filters， adapters， lens， lens hood， lens cap， and more...<br>Adapter Ring Tips:<br>Not all lenses are designed with standard filter accessory screw in thread sizes. For these lenses， many of which are very popular， the way to mount a filter is via an adapter ring. A main feature of adapter rings is that you can utilize one size filter with a number of different sized lenses via different adapter rings<br>An adapter ring consists of two parts: An adapter ring and a retaining ring. The non-threaded filter is held in place between the two as you screw the retaining ring into the adapter ring. The adapter ring is than screwed directly into the lens or is mounted to the outside diameter of the lens barrel via a setscrew lock ring adapter<br>To stack non-threaded filters， a second retaining ring is required to be threaded into the first retaining ring and the second filter is than held in place between the two<br>Larger or smaller filters than the designated filter size may also be utilized on lenses via a Step Up or Step Down ring. To determine which type ring you need， start with the lens accessory size of your lens and convert it to the desired filter size needed to be used<br>