Spectra Precision DE-50 Diagonal Eyepiece The Spectra Precision DE-50 Diagonal Eyepiece is a durable 90° viewing adapter designed for use with the DET-2 Theodolite , allowing more comfortable and efficient angle measurements in tight or low-clearance working positions. It improves usability by providing a perpendicular viewing angle, making it easier to take precise readings in construction layout and surveying applications. Key Features • Compatible with Spectra Precision DET-2 Theodolite • 90° diagonal viewing adapter for improved ergonomics • Enhances visibility in tight or constrained workspaces • Durable field-ready optical accessory