Introduction: | Key Features 5 Sizes Available: Dia12.5,Dia20mm,Dia25mm,Dia50mm,50x50mm. Optical Densities Ranging from 0.04 to 5.0 Ideal for Low-Power Applications Absorptive Glass Reduces Multiple Reflections Edge Blackening Available Upon Request Our absorptive neutral density (ND) filters are available with optical densities (OD) ranging from 0.04 to 5.0. Unlike their reflective, metallic counterparts, each filter is fabricated from a Schott glass substrate that has been selected for its spectrally flat absorption coefficient in the visible region of 400 - 650 nm. By varying the type and thickness of the glass used, we are able to produce the entire line of absorptive ND filters. Because of variations between different lots of glass, Photonik recommends that the user calibrate the filter in their setup before taking quantitative measurements.
Optional: SM1 mounted version available, with additional charge SGD10 for each SM1 mount(c/w SM1 retaining ring and black teflon washer) |