Disadvantages (...........)
..... Low lumen output. Though the VW40 is rated at 900 ANSI lumens, its actual calibrated output is much lower. The highest reading obtained from our test sample was 423 ANSI lumens, in Dynamic mode with the lamp on high, the iris open, and the zoom lens at its widest angle. Cinema mode, which is the default and our preferred mode for watching high definition movies, measured 373 ANSI lumens. Changing the lamp to low power mode drops lumen output by 30%, and moving the lens to its longest throw results in another 32.5% drop. In rooms with perfect light control, this will not pose a problem. For other rooms, you can either place the projector anywhere you'd like and use a 100" diagonal screen, or give up the advantage of the long zoom lens by keeping the projector closer to the screen and go up to 120" diagonal. By eliminating the zoom lens, you can maximize lumen output for large screen installations, but that eliminates part of what makes the VW40 so easy to use.