Offering for the first time, an attachable / detachable monocular eyepiece for a thermal imager device. Easily attached to the TACSIGHT thermal imager, the Bullard TACSCOPE allows the operator full scene detection without the concern of exposure from the large TACSIGHT display screen. When operations demand the advantage of the large display, TACSCOPE is easily removed and the thermal image can be viewed on the TACSIGHT display screen.