Projectors

Runco LS-10i 3-Chip DLP Projector

ARTICLE INDEX

Setup

After placing the projector on my shelf, which was no easy task considering its 41-pound weight, it took me only minutes to center, zoom and focus the image on my Carada screen. The LS-10i has an internal sensor which detects its orientation and flips the image accordingly, very slick. With a non-inverted installation like mine, I had to use most of the available lens shift to get the image fully on the screen. Kudos again to Runco for including motorized lens functions. It’s so easy to focus when you can stand right up by the screen and simply push a button to achieve razor-sharp focus.

Once I had put about 60 hours on the lamp, calibration was no different than previous Runco models I’ve reviewed. Since I was using a relatively short throw on a small (for this projector) screen, I selected the Economy lamp setting. This runs the lamp at 230 watts instead of 260 and results in a roughly 15-percent reduction in measured light output. How much are we talking about? You’ll have to read the next two sections to see!

At Runco’s suggestion, I turned off the ConstantContrast before performing the calibration. Dynamic iris controls always play havoc with gamma and can make proper adjustment difficult. I also found this feature negatively affected grayscale accuracy. After calibrating I turned it back on and immediately saw a color shift. This was verified with measurements. I observed this same issue in my evaluations of the LS-5 and Q-750i projectors. ConstantContrast not only manipulates the iris, it also shifts the dynamic range of the DMD chips. While it does increase perceived contrast, I find the color shift an unacceptable side effect. You can use the Adaptive Contrast control if you only want an automatic iris but this produces clipped blacks and brighter whites. Honestly, the native contrast of the LS-10i is so good, these features are unnecessary. If you want even greater image depth, I suggest a neutral density filter and a gray screen.

After lowering Contrast to 0 from its default of 100 I proceeded to dial in the grayscale. As you’ll see in the benchmarks, required adjustments were slight. Gamma was set at 2.2 and the color gamut was set to PCE so I could tweak the color management system. As it turned out, the default color gamut was nearly spot-on but I can never leave well enough alone so I made some small adjustments. The CMS only has controls for the six colors’ x and y values; none for luminance, so you can’t make huge changes, but there really isn’t any need. You’ll see in the measurements that I was only able to make the tiniest improvement. When I completed the calibration, I had a peak light output of over 33 foot-Lamberts. This was the lowest number I could achieve. The only way to reduce this would have been with neutral density filters as the LS-10i does not have a manual iris.