65-814 50 mm Dia. Hoya ND-25 Absorptive Neutral Density (OD 0.6) Color Filter; t=2.5 mm 400-700nm
- Type
- Filter
- Subtype
- Color Glass
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 50 mm
Material
- Name
- UVFS
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.458448271212196
- λ
- 588 nm
- B1
- 0.6961663
- C1
- 0.004679148 μm2
- B2
- 0.4079426
- C2
- 0.013512063 μm2
- B3
- 0.8974794
- C3
- 97.93400254 μm2
65-814 50 mm Dia. Hoya ND-25 Absorptive Neutral Density (OD 0.6) Color Filter
The 65-814 is a 50 mm diameter Circular Color Glass Filter, specifically an Absorptive Neutral Density (ND) Filter, manufactured by Hoya. This filter is characterized by its Neutral Density value of 0.6, often denoted as ND-25, which reduces light intensity without altering color balance. The filter's geometry includes a diameter of 50 mm and a thickness of 2.5 mm, making it a thin lens.
The filter's material ID is UVFS MAL-1965, and it is designed to operate within the wavelength range of 400-700 nm, peaking at 588 nm. The front and back of the filter are coated with EDMC 48-527, a coating type not specified in the data. However, it is known to be a Color Glass filter, which implies that it is designed to absorb specific wavelengths of light to alter color balance.
The vendor for this item is Edmund Optics, and the filter is currently in stock with a valid weblink provided for further information or purchase.