Magnetically attractable filter device

Abstract

A magnetically attractable filter device includes an adapter ring, designed to be arranged at the front end of a lens; one or more filters, each of which includes a filter frame and a lens element, with the lens element mounted on the filter frame. The filters are sequentially stacked at the front end of the adapter ring, with the adapter ring and the adjacent filters being magnetically attracted to each other, adjacent filters being magnetically attracted to each other. Magnetically attracted ends of the adapter ring and the filter frames of the adjacent filters, as well as magnetically attracted ends of the filter frames of the adjacent filters, are respectively provided with a first locking part and a second locking part. The first locking part and the second locking part engage with each other to achieve locking through mutual rotations between the adapter ring and the filter, between the filters.

Dependencies are inferred from the claim text.