Trimble 90 Degree Eyepiece Kit for S-Series Improve visibility when making steep-angle or high-elevation observations with this Trimble 90 degree eyepiece kit . Designed for S-Series Total Stations, the right-angle viewing position makes it easier to sight through the telescope when conventional eyepiece access is difficult. Key Features 90-degree viewing angle makes steep and high-elevation observations easier and more comfortable. Kit includes 90-degree eyepiece, counterweight, and protective case.