Nikon / Trimble Diagonal Eyepiece The Nikon Diagonal Eyepiece is a precision optical accessory designed to improve visibility and ergonomics when working with total stations, theodolites, and auto levels. Ideal for confined or obstructed jobsite conditions, it enables comfortable viewing at difficult angles while maintaining measurement accuracy. Key Features • Diagonal viewing design for improved line-of-sight in tight or obstructed setups • Provides an erect image for accurate and intuitive sighting • Supports short-distance measurements in confined spaces • Compatible with Nikon XF/XS and Trimble C Series total stations, and Nikon theodolites and auto levels • Rugged construction built for demanding field and construction environments