projectors

Canon SX7 Mark II

The REALiS is about as bright and powerful as compact projectors get.

July 30, 2010
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Peak Brightness

The Canon SX7 Mark II had a decent brightness in Presentation mode: 569.02 candelas per square meter (cd/m[2]). This is about twice as bright as most LCD HDTVs, which, in turn, are typically typically twice as bright as most projectors. You shouldn't have any issues with a dim display as long as you're set to Presentation mode. The projector's other modes aren't quite as bright, but are definitely better than average, with outputs ranging from 350-450 cd/m[2].

Peak Brightness
Peak Brightness Graph

Tunnel Contrast

The SX7 Mark II had some serious issues with tunnel contrast. On a 90% black screen, the projector's black level is 1.95 cd/m[2], which is decent. At an 80% black screen, however, the black level is almost twice as bright; the difference is definitely noticeable. The black level climbs steadily as less and less of the screen is black. We measured a 5% black screen at 17.73 cd/m[2], which is downright horrible. Many projectors have issues with maintaining a deep black, but the SX7 Mark II was especially bad.

Tunnel Contrast
Tunnel Contrast Graph
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Uniformity

The SX7 Mark II really didn't have many issues with uniformity. It wasn't perfect—the edges were 10-20% dimmer than the center—but the transitions in brightness were smooth enough to not be noticeable. You shouldn't see any uniformity issues with the SX7 Mark II.

Uniformity
Uniformity Graph

Greyscale Gamma

Greyscale gamma refers to the curve along which the projector's greys darken to black or brighten to white. You want this curve to have a slope of about 2.2 so each step in the progression is uniform: if the slope is steeper or more shallow, our eyes will have trouble detecting changes between different shades.

We measured the SX7 Mark II's greyscale gamma at about 2.49. That's pretty close to perfect. You shouldn't lose any detail due to the projector's greyscale being out of whack.

Our editors review and recommend products to help you buy the stuff you need. If you make a purchase by clicking one of our links, we may earn a small share of the revenue. Our picks and opinions are independent from any business incentives.

Sections

  1. introduction
  2. Tour & Design
  3. Blacks & Whites
  4. Color Accuracy
  5. Motion
  6. 3D
  7. Viewing Effects
  8. Calibration
  9. Remote Control
  10. Connectivity & Media
  11. Power, Noise & Heat
  12. ViewSonic PJD6531w Comparison
  13. Canon LV-8310 Comparison
  14. Optoma HD66 Comparison
  15. Conclusion
Our editors review and recommend products to help you buy the stuff you need. If you make a purchase by clicking one of our links, we may earn a small share of the revenue. Our picks and opinions are independent from any business incentives.
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Our editors review and recommend products to help you buy the stuff you need. If you make a purchase by clicking one of our links, we may earn a small share of the revenue. Our picks and opinions are independent from any business incentives.

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