The distance between the two lenses needs to be adjusted to adjust the magnification, that is, the imaging can only be achieved at a certain distance, and the lens barrel is for adjusting this.
Shenzhen Runji Precision Hardware Co., Ltd.
Tel: 0755-27404662
Email: xuke@runjijm.com
Address: 1.2/F, Building A, No. 30 Factory Building, Xiacun Third Industrial Zone, Gongming Street, Guangming District, Shenzhen