The V3 040 3000 4 from Gradient Lens Corporation is a Borescope with Depth of Field(DOF) 18 mm to Infinity, Viewing Angle 0 Degrees, Field of View(FOV) 70 Degree, Probe / Insertion Tube Temperature -25 to 80 Degree C (Air), 10 to 30 Degree C (Water) (Sheath), Operating Temperature -20 to 46 Degree C (Display Unit). More details for V3 040 3000 4 can be seen below.