With modern, multi-layer coatings, the Conquest DL offers optimum image quality and target resolution. With a wide angle field of view, secure eyepiece, reliable mechanics, LoTuTec coating, rubberized operating elements, and a robust, anodized construction the Conquest DL is an incredibly stable system. After being tested in Zeiss laboratories under extreme conditions, the result was a secure function even in conditions ranging from -25 to +50°C. The Conquest DL is easy to operate with gloves on due to the two non-slip, rubberized touch buttons (+ and -) used to adjust brightness.