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Intro
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01.Tour & Design
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02.Blacks & Whites
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03.Color Accuracy
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04.Motion
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05.3D
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06.Viewing Effects
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07.Calibration
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08.Remote Control
Optoma GT720
Previous: Page 2
Blacks & WhitesNext: Page 4
Motion
Color Accuracy
- Great shadow details, less detail in highlights
- Excellent color temperature consistency
- Terrible match-up to the rec. 709 color standard
Color Temperature (7.02)
The Optoma GT720 had absolutely no problems with maintaining a consistent color temperature throughout the signal range, from dark to bright.
| Color Temperature |
|---|
 |
RGB Curves (8.19)
To get a good sense of color performance, we separately test every value of all three color channels: red, green, and blue. The chart below is the aggregate result. The smooth, gradual upswing starting at the lower left indicates that the projector is capable of showing great shadow detail. Granted, the three channels are not moving in perfect unison – the green is significantly brighter than the red – but as they move up towards mid-tones the channels become one line. In the upper mid-tones and into the highlights (right side) the curve steepens, meaning the Optoma GT720 is displaying less detail.
Overall, it’s a strong performance.
| RGB Curves |
|---|
 |
| Red Response Comparisons | |
|---|---|
| Ideal Response |
|
| Optoma GT720 |  |
| Canon LV-8310 |  |
| Optoma HD66 |  |
| Epson Home Cinema 705HD |  |
| Green Response Comparisons | |
|---|---|
| Ideal Response |
|
| Optoma GT720 |  |
| Canon LV-8310 |  |
| Optoma HD66 |  |
| Epson Home Cinema 705HD |  |
| Blue Response Comparisons | |
|---|---|
| Ideal Response |
|
| Optoma GT720 |  |
| Canon LV-8310 |  |
| Optoma HD66 |  |
| Epson Home Cinema 705HD |  |
Color Gamut (2.88)
The Optoma GT720 did not match up well with the rec. 709 standard, a common color standard. As you can see in the chart, each of the corners of the triangle – representing the red, green, and blue points – are well off the mark.
| Color Gamut |
|---|
 |
| u' (rec.709/measured) | v' (rec.709/measured) | Error | |
|---|---|---|---|
| Red | 0.4218 | 0.5293 | 0.029600169 |
| Green | 0.1531 | 0.5535 | 0.029506101 |
| Blue | 0.1538 | 0.217 | 0.062923525 |
| D65 (white point) | 0.1986 | 0.4682 | 0.000806226 |
| Read Reviews of Comparison Products | ||
|---|---|---|
 Canon LV-8310 |
 Optoma HD66 |
 Epson PowerLite Home Cinema 705HD |
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Optoma GT720 Manual
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