Neutral density (ND) filters are designed to reduce the amount of light that passes through the lens. They are characterized by their optical density (OD), which indicates the amount of energy blocked by the filter. A high OD value implies a low transmission, while a low OD value implies a high transmission. ND filters can be combined to achieve a desired optical density.
To calculate the final outer diameter of the system, simply add the outer diameter of each filter. Starting with the ND2, which is equivalent to an f-stop reduction, and the lowest level ND filter manufactured, each subsequent ND classification produces a further f-stop reduction. As most of the incident energy is absorbed, these filters cause fewer problems due to the presence of multiple reflected beams compared to metal-type filters, but are only designed for use with lower power supplies. ND filters are beneficial for both photographers and videographers. They can be used to create a changing deep forest scene or to achieve lush green grass and sunsets. When photographing a body of water, for example, setting a long exposure time creates a softening effect that makes the water appear serene and crystal clear.
Instead of buying multiple ND filters with different ratings, you can have one ND filter with five different ND ratings that you can quickly adjust. Although ND filters are great products, they're too expensive for most consumers, especially beginners and hobbyists. Each lens has a different diameter, which you can find by looking for a symbol similar to a circle crossed by a horizontal line. Optical density (OD) filters, on the other hand, are designed to reduce the amount of light that passes through the lens without affecting its color or hue. OD filters can be combined to achieve a desired optical density. To calculate the final outer diameter of the system, simply add the outer diameter of each filter. Unlike ND filters, OD filters do not cause any problems due to multiple reflected beams and can be used with higher power supplies.
They are also more affordable than ND filters and can be used for both photography and videography. OD filters can be used to create stunning sunsets or to achieve lush green grass in landscape photography. When photographing a body of water, for example, setting a long exposure time creates a softening effect that makes the water appear serene and crystal clear. In conclusion, both ND and OD filters have their own advantages and disadvantages. While ND filters are more expensive and cause fewer problems due to multiple reflected beams, they are only designed for use with lower power supplies.
On the other hand, OD filters are more affordable and can be used with higher power supplies but do not reduce light as effectively as ND filters.
