Fushun, China - September 02, 2024 Two laser pointers were attached to the blackboard, and an elderly person demonstrated the ...

The wavelengths generally are in red and blue colour. The most commonly used and the earliest example of an achromatic lens is the achromatic doublet. An achromatic doublet is made from a pair of ...

Among them, glass concave/convex linear structures with feature sizes ranging from several micrometers to hundreds of micrometers find intensive applications. For instance, cylindrical microlens ...

The optical configuration consists ... Incorporating a new optical design for the shorter register of mirrorless cameras, the Sigma 50mm F1.4 DG DN Art is a high-grade, fast standard lens for the Sony ...

Google is upgrading its visual search app, Lens, with the ability to answer near-real-time questions about your surroundings. English-speaking Android and iOS users with the Google app installed ...

The best lenses for astrophotography are arguably the most important tools in your arsenal for getting clear, sharp images of the night sky. An astro lens needs to offer a wide-angle perspective, not ...

The fit and feel of contact lenses are very nuanced, and it can take some trial and error to make sure they’re just right. You want lenses that offer precise vision ...

The best standard zoom lenses are some of the most versatile tools a photographer can carry in their arsenal. While there isn't an official ruling on what constitutes a standard zoom, it's generally ...

If you can’t capture what you want to search for with just a picture, Google Lens will now let you take a video — and even use your voice to ask about what you’re seeing. The feature will ...