The STD500 from Stanlay is a Borescope with Depth of Field(DOF) 15 to 100 mm, Field of View(FOV) 80 Degree, Operating Temperature 70 Degree C, Probe / Insertion Tube Diameter 6.2 mm, 8.5 mm, Probe / Insertion Tube Length 1.55 m. More details for STD500 can be seen below.