Panasonic ET-D3QS400 is a motorized Zoom Lens designed for the PT-RQ50K 3-Chip DLP projector. It supports Auto Lens Identification and lens memory with a stepping motor for precise zoom control. The focal range is 45.3–65.6 mm and the aperture is F/2.5. Throw ratios vary by image aspect: 1.43–2.09:1 (17:9), 1.70–2.48:1 (16:10), 1.52–2.23:1 (16:9), and 2.04–2.98:1 (4:3). Dimensions are 187 × 192 × 450 mm and weight 8.5 kg. Calibration is required whenever the lens is mounted.