48-530 12.5 mm Dia. Hoya ND-0.3 Absorptive Neutral Density (OD 1.5) Color Filter

The 48-530 is a 12.5 mm diameter absorptive neutral density color filter, manufactured by Hoya and distributed by Edmund Optics. This filter is designed with a thickness of 1.5 mm and operates within the wavelength range of 400-700 nm, making it suitable for a wide range of optical applications.

The filter features a neutral density of 0.3, also represented as an optical density (OD) of 1.5. This means it reduces the intensity of incoming light by a factor of 10, offering excellent light control. The absorptive nature of the filter implies that it reduces light intensity by absorbing it, rather than reflecting or scattering it. This can be beneficial in maintaining image quality and reducing unwanted reflections.

The filter's geometry includes a diameter of 12.5 mm and a thickness of 1.5 mm, making it a thin lens. The thin lens shape is often preferred in optical systems where space is limited, or where minimal optical path deviation is required.

The filter is coated on both the front and back surfaces with the EDM 48-530 coating. The specifics of this coating are not detailed in the provided data, but it generally implies improved performance, such as increased durability, better light transmission, or reduced surface reflections.