Abstract: Disclosed are a multifunctional lens cover, a photographic filter structure and a photographic device. The multifunctional lens cover includes a conversion structure, a filter body and a cover structure. The conversion structure is detachably connected to a lens body, the filter body is detachably connected to the conversion structure, the cover structure includes a first connecting portion and a second connecting portion, the first connecting portion is provided with a first magnetic member to magnetically attract the lens structure, and/or the second connecting portion is provided with a thread structure to be screwed to the lens structure.

Abstract: Disclosed is a filter assembly and an unmanned aerial vehicle (UAV). The filter assembly includes a base and a filter holder. The base includes a mounting hole and a convex plate. The mounting hole is defined through the base along a first direction and matched with an outer periphery of a lens. The convex plate protrudes from a periphery of the mounting hole in the base along the first direction, and is configured to press against and match with a protrusion portion of the lens to mount the base on the lens. The filter holder is provided with a filter and detachably mounted on the base.

Abstract: A method for fabricating a semiconductor device includes the steps of: forming a first inter-metal dielectric (IMD) layer on a substrate; forming a contact hole in the first IMD layer; forming a bottom electrode layer in the contact hole; forming a magnetic tunneling junction (MTJ) stack on the bottom electrode layer; and removing the MTJ stack and the bottom electrode layer to form a MTJ on a bottom electrode. Preferably, the bottom electrode protrudes above a top surface of the first IMD layer.

Abstract: Disclosed is a follow focus. The follow focus includes the gear box, the handwheel assembly and the follow focus assembly. The handwheel assembly includes a handwheel body and an active worm, the active worm is fixed to the handwheel body and extends toward the gear box, and the active worm is provided with a first worm gear; and a follow focus assembly includes a follow focus gear and a driven worm, the driven worm is fixed to the follow focus gear and extends toward the gear box, the driven worm is provided with a second worm gear, an angle between the active worm and the driven worm is 90°, and the first worm gear is meshed with the second worm gear.

Abstract: Disclosed is a mobile phone clip, including: a clamping member, a supporting member, and a base. The clamping member is rotatably connected to the supporting member through a first rotating assembly, the supporting member is rotatably connected to the base through the second rotating assembly, and a third rotating assembly is provided on the base. The second rotating assembly is configured to rotate supporting member to adjust a pitch angle of the mobile phone, the base is provided with a third rotating assembly for connecting an external equipment, and the third rotating assembly is configured to horizontally rotate the base to change an orientation of the mobile phone.

Abstract: Disclosed is a nonferrous magnetic filter system. The nonferrous magnetic filter system includes a filter assembly and an adapter ring. The filter assembly includes a lens ring, a first magnet, a first filter lens and a first clamping ring. The first magnet and the filter lens are firmly pressed and fixed on the lens ring through the first clamping ring. The adapter ring includes a fixing ring, a second magnet and a second clamping ring. The second magnet is firmly pressed and fixed on the fixing ring through the second clamping ring. The filter assembly is configured to be assembled on the adapter ring from a side of the adapter ring through a mutual adsorption of the first magnet and the second magnet.