Clear filters are a valuable tool for photographers working in harsh environments and are a wise addition to any photographer's kit. Positioned in front of the lens, they provide an extra layer of ...

Editor’s note: In this Design Idea (DI), contributor Bonicatto designs a digital filter system (DFS). This is a benchtop filtering system that can apply various filter types to an incoming signal. The ...

Digital signal processors (DSPs) continue to receive a great deal of attention in new product design. For example, digital filter design reflects the importance of understanding and using this ...

The Fotga Adjustable Infrared Filter can cut more or less visible light so you can dial in the exact IR effect you want – but is it any good?

I turn the Rollei Astroklar light pollution filter to the night sky to see if its low-light city shots live up to its famous ...