Bresser DIN-Planachromatic Objective 20x. Plan correction minimizes refocus between center and edge of field and is especially useful for imaging. Specifications for Bresser DIN-Planachromatic 20x Objective: Manufacturer: Bresser Additional Features: Scope of supply DIN-PL 20x planachromatic Magnification: 20 x Magnification Type: Fixed Package Contents: Bresser DIN-Planachromatic 20x Objective Bresser 59-41520: DIN-Planachromatic Objective 20x