A liquid-cooled camera assembly that includes a camera for viewing the combustion process in an industrial gas turbine that further includes a tri-concentric tube assembly, and a window cap positioned at a first end of the tri-concentric tube assembly. The camera may be positioned adjacent to and behind the window cap. The tri-concentric tube assembly may form channels between the tubes that direct the flow of coolant to the camera from an inlet and from the camera to an outlet. The coolant may be water. The window cap may be cylindrical and may not exceed 1 inch (2.54 cm) in diameter. The window cap may be brazed quartz.