Review: Add on lenses for phones are now commonplace, but some are better than others. Sandmarc's 16mm wide angle lens and hybrid filters give you additional control over your image, but are they ...

First thing first, despite the ultra-wide angle, Canon’s RF 10-20mm lens is a rectilinear lens, not a fisheye. It features one Super UD element, three standard UD elements, and three aspherical ...

Tunable filters are optical filters that are suitable for applications requiring wavelength tuning. Two of their main specifications are the optical density (OD) and the out-of-band rejection. The ...

Researchers have designed an optical filter on a chip that can process optical signals from across an extremely wide spectrum of light at once, something never before available to integrated optics ...