Light adjustment device and photography auxiliary device

A light adjustment device comprising:

• a lens head and a lens tube, wherein the lens head is configured to mount a lens, one of the lens tube and the lens head are disposed with one sleeving is sleeved around the other of the lens tube and the lens head, and the lens tube is slidable with respect to the lens head in a first direction;
• wherein a rotating assembly is rotatably mounted on one of the lens tube and the lens head, the rotating assembly is drivingly connected with the other of the lens tube and the lens head through a transmission structure, at least a portion of the transmission structure is rotatable with the rotation of the rotating assembly, the transmission structure is configured to convert a rotational output of the rotating assembly into a linear output of the other of the lens tube and the lens head, so that the lens tube is capable of reciprocating linearly in the first direction relative to the lens head under the action of the linear output;
• and
• wherein the lens tube and the lens head are relatively fixed in a circumferential direction, the transmission structure comprises a first transmission member and a second transmission member threadedly engaged with each other, the first transmission member is configured to rotate following the rotation of the rotating assembly, and the second transmission member is relatively fixed to the other of the lens tube and the lens head.

A photography auxiliary device, comprising a light source and a light adjustment device which comprises a lens head and a lens tube;

• wherein the lens head is configured to mount a lens, one of the lens tube and the lens head are disposed with one sleeving is sleeved around the other of the lens tube and the lens head, and the lens tube is slidable with respect to the lens head in a first direction;
• wherein a rotating assembly is rotatably mounted on one of the lens tube and the lens head, the rotating assembly is drivingly connected with the other of the lens tube and the lens head through a transmission structure, at least a portion of the transmission structure is rotatable with the rotation of the rotating assembly, the transmission structure is configured to convert a rotational output of the rotating assembly into a linear output of the other of the lens tube and the lens head, so that the lens tube is capable of reciprocating linearly in the first direction relative to the lens head under the action of the linear output;
• and
• wherein the light source is arranged in the lens tube of the light adjustment device.