13-078 12.5 mm Dia. Hoya ND-70 Absorptive Neutral Density Filter; OD 0.1 425-675nm

This is the 13-078 Neutral Density Filter from Hoya, a high-quality optical component designed for use in a wide range of applications. The filter boasts a 12.5 mm diameter and a thickness of 1.2 mm, making it a versatile and compact solution for various optical systems.

The filter is an absorptive type, which means it reduces light intensity by selectively absorbing certain wavelengths. In this case, it is designed to absorb light in the 425-675nm range, making it ideal for use in systems where control of visible light is necessary. The absorptive nature of the filter also ensures that it does not introduce any additional chromatic aberration, a common issue with other types of filters.

The filter has a Neutral Density (ND) value of 0.1, which corresponds to an Optical Density (OD) of 0.1. This means it reduces the light intensity by a factor of 1.26, providing a subtle yet noticeable reduction in brightness. This makes it suitable for applications where a slight reduction in light intensity is required, without significantly altering the color balance of the light.

The filter is coated on both sides with the EDM 13-078 coating, which provides additional protection and durability. The coating also helps to reduce surface reflections, improving the overall transmission efficiency of the filter.

This filter is sourced from Edmund Optics, a leading vendor in the optical industry. It is currently in stock, as indicated by its weblink status, and more information about the filter can be found on the vendor's website.