In this video I show how to convert inexpensive truck mirrors into powerful first surface solar concentrators. Check out my sponsor Brilliant for a really fun way to learn! <a href=" First surface ...

It towers above the museum's displays of ship models and marine artifacts. This is the Fresnel lens, not one lens really, but numerous tiers of prisms. Lenses like this one turned simple flames ...

At Milan Design Week 2025 Japanese craftsmanship was a front runner with an array of projects in the spotlight. Here are some ...

Oregon's 363-mile coastline is home to numerous iconic photo ops, including the gorgeous Yaquina Head Light, which sees half ...

The recently restored Greens Ledge Lighthouse, located a mile off the Connecticut coast, offers overnight stays in the middle ...

Naval aviators know that traffic light as the Improved Fresnel Lens Optical Landing System. A pilot uses IFLOLS to discern his glide slope—the angle at which aircraft descend and land—by ...

Amateur Photographer verdictThis build-it-yourself pinhole camera for Instax instant film is fun to build and can, with a bit of luck, deliver some nice prints. It would make a great gift for ...

Lens performance to rival the top players in the cycling glasses market, with spares and a case to boot. Some finishing details are lacking, but overall, it’s a mighty impressive package that ...

U.S. Space Force chief Gen. Chance Saltzman clarified the Golden Dome is not a single mega-shield, but a network of systems built to counter advanced missile threats. The system will combine ...

We have rounded up the best zoom lenses with options to suit a range of cameras and photography styles, just in time to make the most of April's new moon. Zoom lenses help you to get closer to ...

After 25 years, Xcel Energy Center will be getting a new name. The existing naming rights agreement for the downtown St. Paul arena will come to an end this summer, the NHL's Minnesota Wild said ...