Originally Posted by johnsmith808
I had an Optoma hd33 briefly. The lower contrast with the darkchip 2 was disappointing. The Acer has a darkchip 3.
The Acer 5360 does not have higher contrast than the Optoma hd33. The Acer 9500bd does beat the Optoma hd33 in black levels, but not the 5360. The Dark Chip version does not determine the contrast of the projector by any stretch of the imagination (it can affect it some, but not a huge amount). If the Optoma looked less contrasty than the Acer, then something was wrong with the calibration or you had a bad unit.
Contrast is mainly determined on a DLP by how they darken the mirrors and lens paths with optical coatings and the way they rig the mirrors to reduce backwash reflection inside the path and the quality of the overall optics, as the DLP mirrors cause light pollution in the device. There are (4) main things that determine a DLP's contrast, but I won't go into it all. When they add all those coatings and adjust the light path, they reduce brightness but increase contrast.
For instance, the Mits hc4000 has the highest Native On/Off of a DLP under $2000, and it is also one of the darker DLP's in this price range (no coincidence). The Acer 9500bd and Optoma hd33 have about the same Native On/Off, but the reason the 9500bd beats it is because the 9500 has an IRIS and the Optoma hd33 does not.