Camera capable of automatically compensating focal length

A camera capable of automatically compensating focal

• length, comprising:
• a base;
• an adjust seat comprising a first ring, a second ring, and a connecting member, wherein the first ring and the second ring are coaxially sleeved with each other and a distance is kept between the first ring and the second ring, the first ring comprises a first end and a second end that are axially opposite to each other, the first end is fixed on the base, the second ring comprises a third end and a fourth end that are axially opposite to each other, the third end is fixedly connected to the second end of the first ring via the connecting member, the fourth end, with respect to the third end, is distant from the second end, the fourth end has a first coupling part;
• and
• a lens barrel having a second coupling part, wherein the second coupling part is correspondingly coupled to the first coupling part;
• wherein the first coupling part comprises a third ring and a radial connecting member, the third ring comprises a fifth end and a sixth end that are axially opposite to each other, the fifth end is connected to the fourth end of the second ring via the radial connecting member, the sixth end of the third ring is coupled to the lens barrel,
• wherein the first coupling part is an inner thread portion and the second coupling part is an outer thread portion for threading with the inner thread portion.