This 7X Lighted Comparator works well with many of our 26mm Diameter Reticles. (See PDF Comparator/Reticle Usage Matrix) It has an excellent, anti-reflection coated, achromatic lens system (3 elements, 2 groups) and 24mm Field of View based on actual testing at our plant. One removable standard Scale Reticle, 0 to 0.8”, .005” divisions and centered Crosshair is provided with the 7X Lighted Comparator. The Focusing Ring is a smooth action helicoid twist ring. The 7X Lighted Comparator is provided in a hard shell vinyl case with lens tissue.