This could be somewhat corrected using the horizontal shift however, vertical lens shift should ideally only influence the vertical axis. I did notice that at the upper end of the vertical lens shift range, the image would actually move up and to the right slightly. It provides a 0% to-60% vertical adjustment range and a ☑5% horizontal shift. The HT4550i offers both vertical and horizontal lens shift capabilities. For my 100-inch diagonal image, the HT4550i was placed approximately 9.7 feet away, which aligns with BenQ's distance-to-screen chart. I found the provided distance chart to be accurate. The throw ratio corresponds to approximately 2.4 feet to 32.6 feet, allowing projection of an image as small as 30 inches diagonal up to a massive 300 inches diagonal. Its lens has a 1.15-1.50:1 throw ratio for a 1.3x manual zoom and focus, which, thanks to smooth mechanical operation, made it easy to dial in the image. The HT4550i features optics with a 0% offset to the screen, so the centerline of the lens from a ceiling-mounted projector would more or less align with the top edge of the projected image. BenQ offers its CM00G3 Universal Ceiling Mount as an option, with a $59 MSRP at the time of writing. It supports various mounting options, including standard tabletop or ceiling for front- and rear-projection. Weighing 14.55 pounds and measuring 16.54 x 5.31 x 12.28 inches (WHD), the HT4550i is not a lifestyle or portable projector but is still compact and lightweight enough to be moved around with ease. However, the dynamic contrast does improve when SmartECO is used. The HT4550i has a published contrast specification of 2,000,000:1 with dynamic light source dimming, but its native contrast ratio without light source dimming measured at 900:1, which is relatively low and noticeable in content. The light source has a long life of 20,000 hours in the Normal and SmartECO Light Source Modes, and 30,000 hours in ECO, ensuring years of use without the need for bulb replacements. Nevertheless, the best picture modes do measure well for accuracy and provided a fair amount of measured brightness and vibrant images. It's good to see an LED projector hit this kind of brightness, however, this mode is noticeably green-biased and its default color temp cannot be adjusted from the projector's Native setting to the more accurate Normal color temperature. Our sample's 4LED light source (RGGB, with an extra green LED for brightness) also exceeded the specified 3,200 ANSI lumens, measuring 3,413 ANSI lumens in its brightest picture mode. During testing, the HT4550i thankfully provided a crisp and detailed 4K UHD image without demonstrating any rainbows, which can sometimes occur with single-chip DLP projectors. This resolves the 8.3 million pixels on the screen to display 4K resolution. The ideal portable screen projector combination incorporates the perfect combination of the right projector with the ideal portable screens.The new BenQ HT4550i utilizes a relatively new Texas Instruments 0.65-inch DMD DLP chipset to achieve its 4K UHD resolution of 3840x2160 from a 1080p native array with four-phase pixel shifting. Such portable projection screens include small projector screen or even large models. The portable screen for projector factor involves numerous variables. In order to have the best portable projector display, a, portable projector screen cannot come in a one-size-fits-all format. This is ideal for small or large venue portable presentations. This feature empowers the end user to simply open, pull up the screen, and project. Portable Projection Screen options include large frame options, free-standing roll-up, or even desktop variants of mobile projector screen. A specially designed Portable Projection Screen is available for the specific environment that each presenter works in. Elite offers the best portable projector screen to accompany a portable projector for the full range of projectors from entry-level to the best portable projectors to ensure that you will have the best portable projector set-up that is possible. Regardless if it is Portable Movie Screens for special occasions, a mini projector screen for Pico projectors, or a portable movie screen for the home or office, Elite has a broad selection of movable projector screen solutions. Portable projector screens are in high demand for a variety of reasons.
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