Light output. The Pro Cinema G6900 is rated at 6,000 ANSI lumens. We obtained a reading of 6021 lumens using the projector's internal test pattern and Dynamic mode, which is the projector's brightest. However, switching to any external source reduced light output in Dynamic to a maximum of 5012 lumens, with brightness uniformity of 85%.
On many projectors "Dynamic" mode is an over-green, over-bright, under-saturated image mode that maximizes light output at the cost of image quality. On the Pro Cinema G6900, though, Dynamic mode still has respectable color saturation and contrast performance despite its high brightness. If you're using the Pro Cinema G6900 in a well-lit room and need the extra output, there's nothing wrong with using Dynamic mode to get it.
Presentation mode produced 3922 lumens and has a bluish tint, which can be useful when dealing with yellow ambient light. Presentation mode has superior color accuracy and black level performance to Dynamic mode, and can be useful when room lighting is not as severe.
Theatre mode, at 4049 lumens, has better color saturation and accuracy than both Presentation and Dynamic modes as well as a default gamma calibration that brings out more shadow detail in the darkest areas of the image. You will note that Theatre mode is slightly brighter than Presentation mode, though not enough to make a difference in visible image brightness. In a room with less ambient light, Theatre mode produces its best image with the auto iris engaged and the lamp set to low power, which reduces light output to 2632 lumens.
Sports mode, at 4285 lumens, has the same blue bias as Presentation and is appropriate for live television and video content.
Any image mode can be reduced in brightness by switching to ECO lamp mode. ECO mode reduces lamp power by 36% and can bring the Pro Cinema G6900 to a more appropriate level of brightness for smaller screens or rooms with reduced ambient light.
Contrast. Though black level is not the projector's strongest suit, the Pro Cinema G6900 produces a well-balanced image with sufficient contrast for viewing most film and video. The default gamma does a fine job of preserving shadow detail, though we did boost Brightness by a point or two to prevent crushing of very deep shadows. The automatic iris is useful for deepening black level when room conditions allow.
Color. Even in its brightest modes, the Pro Cinema G6900's color is well-saturated. Color light output matches white light output, so that color-rich images are balanced, bright, vibrant and engaging.
Sharpness and Clarity. The Pro Cinema G6900 is native WUXGA. While WUXGA is not a video resolution per se, you can simply think of it as a 16:10 version of 1080p. In other words, you can still display 1080p film and video content natively on the Pro Cinema G6900, leaving small black bars at the top and bottom of the image. Since scaling isn't required, you still get the benefits of a 1:1 pixel match -- namely, sharpness and clarity of detail.
There is significant digital noise present in Dynamic mode when watching film or video. This noise is much less evident in the projector's other image modes, so it is best to use Sports or Theatre mode if you find the digital noise objectionable and you can afford the reduction in light output.
Input Lag. Straight out of the box, the Pro Cinema G6900 measured 92.3 milliseconds of input lag, or five and a half frames on a 60 FPS signal. Like other Epson projectors, the Pro Cinema G6900 includes an option to use either "Fast" or "Fine" image processing. Fast processing reduces input lag to 40 milliseconds, or just over two frames.