HP Marketing (Pine Brook, NJ, www.hpmarketingcorp.com) is now offering an 82mm version of the Heliopan Vario ND filter. The new filter is adjustable from 1 to 6.6 stops of ND (0.3 to 2.0 density); it is neutral in color and mounted in a black anodized brass ring that is numerically calibrated with an index for… Continue reading »