Master night vision monocular GEN1+ 6x50 - YouTube. Video will open in a new window. Master 4x50 Night Vision Monocular is simply unrivaled when it comes to long range illumination. The Master 4x50mm Night Vision Monocular from Master provides the user with exceptional optical clarity in a technologically advanced digital night vision device. This bold member of the Master night vision performance in a high magnification device. The Master 4x 50mm allows you to see through the night with crystal clear precision with an impressive range to match. With the Master Monocular , no ...