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 ...

One feature I'd really like, the equivalent of a neutral density filter to better handle scenes with bright and dim patches, appears headed for Lightroom. Stephen Shankland worked at CNET from 1998 to ...

If you are ever planning to shoot photography outside — whether it be a vibrant cityscape or gorgeous landscape — you will want to use a neutral density filter (or ND filter). An ND filter essentially ...

A quality ND filter (short for neutral density filter) cuts the amount of light coming into the camera without affecting the color or overall appearance of the image. While photographers often want ...

Featuring a spectrally flat region between 700 and 1,100 nm and a low coefficient of thermal expansion, Tech Spec NIR neutral-density filters are ideal for attenuating IR sources such as 1,064-nm ...

Fig 1. Density addition and subtraction can easily separate these audio channels before digitalization. Fig 2. Density multiplication can easily be used to multiply these two inputs in several ...