AND-25C-40 25 mm Dia. Optical Glass Unmounted Visible Absorptive Neutral Density Filter 400-700nm

The AND-25C-40 is a high-quality Neutral Density Filter, unmounted and round, with a diameter of 25 mm. This filter is designed for use in the visible light spectrum, specifically between 400-700nm. It is sourced from OptoSigma, a renowned vendor in the optical industry, and is available for purchase through their website.

This filter is of the Absorptive type, meaning it reduces the intensity of light by absorbing it rather than reflecting or scattering it. The filter's coating, identified as 'opt and-40' on both the front and back, contributes to this absorptive property. The geometry of the filter includes a thickness of 2mm, which is relatively thin, making it suitable for various optical applications.

The material of the filter is UVFS MAL-1965, a type of optical glass known for its durability and clarity. The filter's shape is thin lens, which is a common choice for many optical systems due to its minimal thickness and weight.

According to the vendor's website, the filter is currently in stock, indicating its availability for immediate purchase and use. The catalog number for this item is AND-25C-40, which can be used for easy reference and identification.