Constant f-stop, an exclusive feature on Canon's REALiS Pro AV Compact Installation LCOS Projectors, allows you to maintain consistent brightness throughout its zoom range. Only from Canon, this important advantage provides projector placement flexibility and means that the Lumens specified for the projector will be delivered regardless of zoom position. Typical lens designs have variable aperture from wide-angle to full telephoto, and can lose as much as 50% of light output across the zoom range.
With Canon's 1.8x zoom, you'll always look your brightest.
Also available in a WXGA+ (REALiS WX520) model.