Presets - The PJD7820HD features seven Color Mode presets: Brightest, PC, Dynamic PC, ViewMatch, Movie, Dynamic Movie, and Gaming. The Dynamic variants sense room brightness and image content and adjust the image based on those parameters to give some of the effect of an automatic iris without the mechanical noise. There are also two User Modes which allow various picture adjustments not available in the other Preset Modes.
Connectivity - The rear panel connectors of the PJD7820HD include dual VGA connectors, an S-video input, an HDMI input, composite video, a VGA output for driving an external monitor, a USB-B input, and various audio inputs and outputs. Additionally, there is an RS-232 connector for serial connections.
Placement Flexibility - With an optical zoom of 1.3:1, the PJD7820HD offers a range of placement options to accommodate room sizes and audience seating configurations.
Heat Exhaust - ViewSonic put the exhaust vent for the PJD7820HD on the right front portion of the chassis. This means that exhaust fan noise is directed toward the front of the room and does not distract audience members seated behind the projector.
Dynamic Eco Mode - This feature reduces power consumption by lowering brightness by about 80%, but it is of limited utility in bright rooms where image washout is likely. Still, this feature is useful for movie viewing in darkened rooms where maximum brightness is not required.
Full HD 3D - The PJD7820HD has full HD 3D compatibility, so you can connect it to a Blu-ray player or broadcast 3D source and it will display that content correctly. If you have any frame sequential 3D content, the PJD7820HD can handle it as well. 3D viewing requires the use of special active-shutter DLP Link glasses, which are not included with the projector. Image brightness is decreased significantly and many color adjustments are not available in 3D mode, but these are common restrictions found on many 3D projectors.
Lamp Life - Normal mode lamp life is 4,000 hours, but Eco mode stretches that time to 6,000 hours -- which is one of the longer lamp lives available for a 3,000-lumen projector. And since Eco mode only drops brightness by 18%, it is an excellent choice if room light permits.
Maintenance - Like many DLP projectors, the PJD7820HD has no air filters to be replaced, but it is recommended that the intake and exhaust ports be vacuumed occasionally to remove and dust or lint that might collect there. Lamp replacement is performed through the top of the projector, so lamp changes can be performed on ceiling-mounted projectors without dismounting the projector.
Warranty - The PJD7820HD offers a three-year warranty, with a one-year warranty on the lamp and a year of express replacement service. This is better than many competing projectors in the sub-$1000 category.