QTY. 1. CARL ZEISS AERO-SCHETCHMASTER

QTY. 1. CARL ZEISS AERO-SCHETCHMASTER INCLUDES 1). BASE PLATE 1). COLUMN 1). CLAMP HEAD 1) . CLAMP HEAD 1). SLOW MOTION CONTROL 2). SET SREWS 1). PHOTO HOLDER ARM 1). BALL AND SOCKET JOINT 1). PHOTO HOLDER 3). LOCKING SCREW 5). PERMANENT MAGNETS 1). PRISM HOLDER ARM 10). PRISM 1). MOUNT FOR LIGHTING OUTFIT 1). LAMP BRACKET 3). BULBS 1). CLAMP SCREW 1). LOCKING SCREW 1). PIN 20). SPECTACLE LENSES IN WOODEN CASE. THE AREO-SKETCHMASTER IS USED PRINCIPALLY FOR TRANSFERRING DETAIL FROM AERIAL PHOTOGRAPHS (VERTICAL AND NEAR VERTICAL VIEW) TO MAPS BY TRACING THAT IS FOR THE REVISION AND CORRECTION OF EXISTING MAP COVERAGE THAT HAS BECOME OBSOLETE BECAUSE OF CHANGES IN PLANIMETRY.