Optoma PT100 Video Projector Review
Don’t expect much from a $180 projector.
- Very low peak brightness.
- Has trouble maintaining its black level.
Peak brightness is very important for a projector. Without a high peak brightness the onscreen image can easily get washed out by ambient light. A low peak brightness also really limits the maximum contrast ratio you can squeeze out of the projector.
The Optoma PT100 has a really, really low peak brightness. Unless you're sitting in a totally dark room, the picture is going to look very, very washed out.
The PT100 had some minor issues with tunnel contrast. When 90% of the screen is black, the projector maintains a black level of about 0.03 cd/m2^ (candelas per square meter). As the percentage of black on the screen shrinks, the black level gradually creeps up, peaking at 0.2 cd/m2. Fortunately, this isn't really a bad black level and since the black level increases gradually, it won't likely be perceptible for the average user.
The Optoma PT100 didn't really have any issues with screen uniformity: the screen was just uniformly dim. Typically brighter projectors have trouble maintaining luminance towards the outside of the screen, but due to the PT100's low luminance output, it doesn't have trouble maintaining an unblemished display.
The projector had a pretty accurate greyscale gamma all things considered. Greyscale gamma ensures each shade from black to white is equally emphasized in a nice even progression. Although the PT100 can't muster a very bright white, it keeps its greys incrementing at even intervals.
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