In the same way photographers have multiple lenses for their cameras, each with a specific use, astronomers also have multiple eyepieces for their telescopes. Eyepieces can offer different focal ...

Here are the best early Black Friday Sky-Watcher telescope deals as we've scoped out the biggest discounts ahead of the sales event. If you're looking for Sky-Watcher telescope deals ahead of ...

(2) To quantify the gain in performance for face recognition tasks when subjects use a bioptic telescopic low vision device. Methods: 30 subjects with AMD (age range 66–90 years; visual acuity 0.4–1.4 ...

Our lens reviews offer detailed information on sharpness, distortion, bokeh, and all the other important factors that go into making a lens great. Our reviews give you all the information you need ...

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 ...

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 ...

Welcome to our guide to the best Canon portrait lenses. Whether you're using a Canon DSLR, an EOS M mirrorless camera or one of the latest EOS R mirrorless cameras, these are the fast primes that will ...

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 ...

Skip to trip to the doctor's office and get contact lenses delivered straight to your door with the best places to buy contacts online. Nasha is a Managing Editor for CNET, overseeing our sleep ...