Polarization
Page 2 of 2 — articles on polarization, sorted newest first.
How Do Polarized Sunglasses Work? 5 Easy Facts & Buying Tips
Polarized sunglasses work by blocking horizontally reflected light — the glare that bounces off roads, water, and snow. A chemical filter inside the lens acts like a microscopic picket fence, allowing only vertically oriented light waves to pass through. This cuts glare, reduces eye strain, and improves contrast. This guide covers the science, the 5 easy facts, when to wear them, what to look for when buying, and the common mistakes to avoid.
What Is a CPL Filter? 5 Essential Photography Tips
A CPL filter (circular polariser) is a glass attachment that screws onto your camera lens to reduce glare, darken blue skies, and make colours pop. It works by blocking polarised light — the same principle as polarised sunglasses. For landscape, travel, and outdoor photographers, it is one of the most valuable accessories you can own. This guide covers how CPL filters work, the 5 essential tips for using them, when to use one, and what to look for when buying.