IN such elementary text-books on geometrical optics as I have consulted it has always seemed to me that the writers have found a difficulty in presenting a precise direct proof of the theorem that ...

Products from the PrismMaster® series are used for high-precision angle measurement of prisms, polygons and many other optical components. The automation of the measurement process ensures fast and ...

Lexy was a producer and on-air presenter who covered consumer tech, including the latest smartphones, wearables and emerging trends like assistive robotics. She won two Gold Telly Awards for her video ...

From lens focal lengths and fill-flash to portraits, macro or stunning landscapes there are techniques for everyone. Learn how to use metering, considering composition and shoot everything from ...