Bresser DIN-Planachromatic Objective 40x. Plan correction minimizes refocus between center and edge of field and is especially useful for imaging. Specifications for Bresser DIN-Planachromatic 40x Objective: Manufacturer: Bresser Additional Features: Spring-loaded for protection of objective lens and specimen Magnification: 40 x Magnification Type: Fixed Package Contents: Bresser DIN-Planachromatic 40x Objective Bresser 59-41540: DIN-Planachromatic Objective 40x