How to replace foam gaskets on NiSi neutral density filters

When using any of the square neutral density filters in either the 70mm, 75mm, 100mm, 150mm or 180mm sizes the back side of the filter has a foam gasket that is designed to create a light seal against the filter holder.

When to use a reverse graduated neutral density filter

Graduated neutral density filters come in several different varieties – the most common of them being soft, medium, hard and also reverse graduated ND filters. Each of them has different benefits on different types of scenes and better times to use them.

What is a Variable ND

What are variable neutral density filters?

Neutral density filters come in a variety of densities, graduations, shapes and sizes. Generally speaking, ND filters are single plates of glass (either square or circular) that are designed to reduce the light that is …

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