SIG SAUER SOZ6WP1850: ZULU6-HDX 18x50mm Schmidt-Pechan Prism PRO Image Stabilized Binocular, FDE. Features of Sig Sauer ZULU6-HDX 18x50mm Schmidt-Pechan Prism PRO Image Stabilized Binocular Sig Sauer ZULU6-HDX 18x50mm Schmidt-Pechan Prism PRO Image Stabilized Binocular.