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Accessories for MidOpt Filters - Step-Up / Step-Down Rings

Step-up rings allow large filters to be used on lenses with smaller diameter filter threads; the filter will be much larger than the diameter of the lens. Use of step-up rings is often mandatory and routine with shorter focal length or wide angle lenses in order to prevent vignetting.

Step-down adapters allow smaller filters to be used on lenses with filter threads of larger diameter. This may result in vignetting so their use is normally not recommended.

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