In addition to calibrating Red Green and Blue for a correct grayscale balance (6500K), there are a number of other settings that come into play. Typically Contrast and Brightness (white balance and black balance), need to be done first. Color saturation and gamma also need to be adjusted. With some projectors even Tint comes into play, although with most, the Tint control only works with the lower quality inputs (composite and S-video).
Post Calibration Grayscale
The PT-AE3000U produced truly excellent results, with only a 60 degree temperature.
That covers it all. This is one of a few projectors which is good enough out of the box, that I won't scream "calibrate it, or pay someone to calibrate it". There is always variation from one projector to another, due to the lamp variation (and colors will actually shift slightly as the lamp ages), but because we didn't have to do much adjusting, most of you will find plugging in our numbers will improve the picture of an already good projector.