The primary purpose of a lens holder is to provide stability and keep optical elements firmly in place. Lens holders can also be used with filters, polarizers, pinholes, and many geometrically ...

Wide field eyepieces have a larger diameter and a wider field of view. Microscope lenses and microscope objectives are used with various types of optical filters. Color filters include a wide range of ...

The Secret Behind Adjustable-Tint Lenses At the heart of these groundbreaking sunglasses is variable neutral density (ND) filter technology, a tool cherished by photographers for its ability to ...

Snapchat's various features can be confusing to the uninitiated. The difference between filters and lenses, for example, may not be clear. But here's a quick social-media lesson: Snapchat filters ...