Tiffen is also tackling the IR pollution problem with the introduction of its new Hot Mirror and Hot Mirror IRND filters. The Hot Mirror Infra-Red Neutral Density (HMIRND) Combination filter addresses this issue in both the Near IR and IR regions of the spectrum. Each HMIRND filter blocks unwanted IR light and has matched IR and ND components to assure accurate color reproduction in the near infra-red region. In addition, Tiffen has introduced the Tiffen Hot Mirror (HM) filter as a stand alone filter for those looking to block just the IR portion of the spectrum, with no appreciable loss of light transmission. For consumer convenience, Tiffen Hot Mirror (HM) Filters can be stacked with their Infra-Red Neutral Density (IRND) Filters from 2007 to achieve the same results as the combination Hot Mirror Infra-Red Neutral Density (HMIRND) Filters. Available now. www.tiffen.com