The ARRI ALEXA LPL LF FSND 0.3is a large-format, neutral density filter providing a 1-stop reduction in exposure. A full-spectrum coating attenuates the light passing through the filter while maintaining a perfectly neutral color balance.This filter’s behind-the-lens design reduces weight and reflections when compared to using a matte box-mounted filter while also adding protection for the camera sensor.CompatibilityALEXA LF cameraMulticoated Optical GlassA broadband, antireflective multicoating both reduces reflections and ensures high image contrast.The water-white glass is precision polished, creating perfectly parallel surfaces, guaranteeing a clear, sharp image.ShimmingIn-camera filtration will change your flange focal depth. Therefore, all internal filters require a properly shimmed lens mount.Use only the original LF IFM shim when filtering with the LF IFM.To compensate for the change in flange focal depth due to the shim, always insert the LF IFM optical clear filter when no ND filtering is needed.Note:When the camera is no longer shimmed for the LF IFM, the glassless LF IFM empty filter frame must be placed back into the filter position.