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 ...

The neutral density filter is indispensable for landscape photographers. SOPHISTICATED SLR CAMERAS with their array of lenses can do many things, but there are still situations where a photo can only ...

Without having other variable ND filters for comparison, we can’t make definitive comments on whether the Syrp filter is superior. But we can say that it provides a compact and versatile addition to a ...

One filter that is in the camera outfit of many professionals is the neutral density filter, or ND filter as it's better known. The filter is less appreciated by amateurs and the reason it probably ...

Variable neutral density filters are very useful for photographers that like manual control in bright light. Instead of paying hundreds of dollars for one, though, you can make your own from just a ...

Reynard Corporation offeres customization of their Circular Variable Neutral Density (CVND) Filters. This technology is best used in high quality optical systems to change the intensity of light from ...

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 ...

Absorptive Optical Glass Neutral Density Filters are available with Optical Densities (O.D.) ranging from 0.10 to 4.00. Absorptive Optical Glass Neutral Density Filters are available with Optical ...

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 ...