A camera lens filter is pretty much what you’d expect: it’s a physical piece of glass that attaches to your camera’s lens, filters the light before it reaches the sensor and, typically, has an effect ...

I've been writing, editing and optimizing search content for 10 years. I’ve been wearing contact lenses for over two decades; to find the best contact lenses for different vision needs, I tapped into ...

Chinese lenses are being manufactured full-throttle and they’re usually much more affordable than big-brand glass – but are ...

In our guide to camera types, we’re going back to basics. If choosing your first camera, it can be difficult to know where to ...

In antiquity, we see examples of magnifying crystals formed into a biconvex shape as early as the 7th century BC. Whether the people of that period used them either for fire-starting purposes or ...

“In optics, there was a problem,” says Amit Agrawal, a physicist at the National Institute of Standards and Technology in Gaithersburg, Md. If you wanted to focus a single lens to two different points ...