D511. At 4.2 pounds and 2,600 lumens with a street price of $549, the D511 will appeal to mobile presenters who need a wide range of inputs including HDMI. Audio output is limited as it is on most very small portables. But picture quality, color, and saturation are solid. For photo club members, the D511 is a very inexpensive way to get great photos up on the screen.
Vivitek has designed a lot of functionality into the D511. It handles most data and video analog inputs, and it sports an HDMI digital input as well. It is small and light enough to delight the mobile presenter, and yet it puts up a bright image that will capture attention in small classrooms and conference rooms.
Brightness and Uniformity: With our test unit set for maximum brightness (Bright mode with BrilliantColor at its highest setting), it puts up 1,890 ANSI lumens, which is a bright picture for mobile presentation use, but not as bright as its rating of 2600. Movie and Presentation modes are equal at 1,310 lumens, while TV and sRGB both generate 1,000 lumens. Game mode puts up 1,205 lumens. The projector's Eco mode lowers brightness by about 14% in all preset modes.
Uniformity is 74%, which is close to the average we have seen for this class of projector. Small packages mean small lenses, and brightness uniformity usually does not match larger projectors. There is a peak in brightness in the lower middle portion of the image, but it is unnoticeable except with images like spreadsheets and text documents that contain a lot of white space.
Image Quality: Data images are sharp and clear once phase controls are adjusted. Edge to edge sharpness is excellent. For colored background material there is no visible hotspotting. Video images are very good. Colors are saturated and reasonably well balanced. The D511's 2300:1 contrast ratio provides a creditable dynamic range with good detail evident in both shadows and highlights.
The DLP color wheel rainbow artifacts from the 2x speed may be noticeable to some viewers when viewing full motion content or slide transitions in Powerpoint, but this is a fact of life for all portable commercial DLP projectors. act is minimal when putting the D511 through its gaming paces. Rainbow artifacts are typically not a problem when viewing still graphic images or photos, and this type of subject matter is a strong suit for this projector with its saturated colors and high contrast.
Image Size and Position: The manual zoom ratio is only 1.1:1, so there is little wiggle room in positioning the projector for a specific image size. Image offset is just about ideal for conference room table top use. The bottom of the image is 6" above the centerline of the lens with a 60" diagonal image projected. In many instances this can prevent the need to use keystone adjustments. If you do need to tilt the unit upward, there is ± 30° of vertical keystone correction available to square up the image. Moving the image higher on the wall is accomplished by dropping and locking the elevator foot on the front of the projector, and horizontal leveling can be done by adjusting the left rear foot.
Lamp Life: The 180-watt lamp is rated at 3,000 hours in Standard mode, but dropping down to Eco mode will add 1,000 hours to its life and drop projector noise to an unobtrusive 28dB.