In order to have more flexibiltaet in the exposure, one often access external ND filters, especially since many cameras do not bring any internal internal. ARRI now also offers its own gray filters, which are absolutely color neutral and offer a high contrast behavior. They correspond to those already built internally in the ALEXA Mini and Amira. Pic1 The Full Spectrum ND filters are made of high quality Schott B270i glass and are coated several times to provide both an anti-reflective and hard-wearing and easy-to-clean surface. The edges are rounded for better handling and black color, which should also minimize stray light. The front filters are available in two sizes, 167.6 mm x 167.6 mm and 101.6 mm x 143.5 mm, respectively, and 8 thicknesses
more infos at bei www.arri.com;)
