Screen Size and Projection Distance H H W W A Projection distance (Minimum (Wide) to Maximum (Tele)) B Center of lens Projection Distance Formula 19 Projection distance ( ①) formula Minimum (Wide) Projection distance (cm) = Projection screen size (inch) × 3.0264 - 2.76 Maximum (Tele) Projection distance (cm) = Projection screen size (inch) × 4.7911 - 2.7788 Projection distance ( ①) formula Minimum (Wide) Projection distance (cm) = Projection screen size (inch) × ×3.42612 - 2.76 Maximum (Tele) Projection distance (cm) = Projection screen size (inch) × ×5.4239 - 2.7788 Projection distance ( ①) formula Minimum (Wide) Projection distance (cm) = Projection screen size (inch) × 3.11054 - 2.76 Maximum (Tele) Projection distance (cm) = Projection screen size (inch) × 4.92431 - 2.7788