How Lens Work in Camera | Lens Mechanism | How Lenses Function - YouTube
Hybrid driving variable-focus optofluidic lens
Amazon.com : ELP USB Camera with Zoom Lens 2.8-12mm Manual Focus Webcam,1.3MP low Illumination Varifocal Web Camera 960P AR0130 4X Zoom Camera,Mini Variable Focus Computer Camera for Windows MAC Linux Raspberry Pi :
Parfocal vs Varifocal Zoom: What is the Difference and Why Does it Matter? | PetaPixel
Zoom lens - Wikipedia
Variable focus thin lens designed for augmented and virtual reality headsets
Myongji University Microsystems Laboratory Directed by Prof. Sang Kug Chung (연구) - Multifunctional liquid lens with variable focus and zoom functions for miniature cameras