NEC Objektiv NP20ZL Long zoom lens for the NEC PX series- 3.58 - 5.38:1

NEC Objektiv NP19ZL Long zoom lens for PX Series (excl. PX602UL/PX602WL) - 2.22-3.67:1 Zoom Ratio 1.65 Projection Ratio 2.22 - 3.67 Focal Length 32.9 - 54.2 mm Aperture 1.86 - 2.48 Screen Size 50 - 300 inch.