The Panasonic ET-ELW21 is a professional fixed-focus (prime) lens engineered specifically for Panasonic’s 3LCD projector series, delivering a consistent 0.8:1 throw ratio across WUXGA, WXGA, and XGA formats. With a fixed focal length of 13.05mm and a bright constant aperture of F2.0, this lens enables exceptionally large, bright images from very short projection distances, making it ideally suited for rear-projection installations, tight ceiling voids, and shallow cabinetry where every inch of throw distance matters. The design serves as an optimal bridge between standard zoom lenses and ultra-short-throw mirror systems, providing wide-field projection without extreme fish-eye distortion.

Unlike zoom lenses, the ET-ELW21 contains no moving internal glass groups for zoom adjustment, which eliminates mechanical failure points and ensures consistent image geometry without optical warp or pincushion effects. The fixed-focus design maximizes light transmission efficiency, allowing the projector's full lumen output to reach the screen with minimal loss. While zoom is fixed, the lens incorporates motorized power focus capability, enabling razor-sharp calibration remotely from the projector's control system or handheld remote. This is particularly valuable for permanently mounted projectors where physical access is difficult.

Constructed to Panasonic’s rigorous professional standards, the lens measures 108 x 108 x 166 mm (4.25 x 4.25 x 6.53 inches) and weighs approximately 1.08 kg (2.4 lbs). Compatibility spans an extensive range of Panasonic 3LCD projectors including PT-MZ880, MZ780, MZ680 series, PT-EZ770Z, EW730Z, EX800Z series, as well as PT-EZ580, EW640, EX610 series and PT-EZ570, EW630, EX600 series. The rugged compact form factor ensures straightforward integration into professional AV installations across corporate, educational, and house of worship environments where reliable short-throw performance is essential.