![]() Button placement is good, there are an ample number of quick access buttons for changing inputs or adjusting menu options. The remote control is small and light with a bright blue backlight that illuminates every key. There's also a legacy VGA port, 3.5mm audio in and out, a mini-USB for firmware updates, a RS-232 control port, and a USB out. The back of the projector has two HDMI outputs, one is version 2.0 (for HDR content) and one version 1.4. There’s an adjustable foot to elevate the picture to the proper height if the projector is on a table or stand, and a keystone adjustment, although use this very sparingly as it will affect picture quality. ![]() It’s important to note that, like most DLP projectors, the PX747-4K does not have lens shift so you’ll need to be extra vigilant about horizontally centering the lens to the screen. On the top of the projector are the control panel buttons (if you don’t want to use the included remote for whatever reason) and the focus and zoom adjustment rings. In any of those modes the cooling fan noise is negligible and not distracting. There is also a Dynamic mode, which I recommend using, that acts like an auto iris and adjusts the light output based on the image it's projecting. The lamp's life gets extended to 15,000 hours in Eco mode, but the light output has to be dialed down significantly. In that setting you’ll get around 4,000 hours of lamp life. You shouldn’t have any issue having this in a room with ambient light, especially in its normal brightness setting. The projector is rated at 3,500 ANSI lumens, which is very bright for a home projector this size. Title=More%20Expert%20Tech%20Roundups&type=articles%2Cvideos&tags=tech-roundup&count=6&columnCount=6&theme=article It's done so quickly that our brains perceive it at four individual pixels happening at the same time. The chip in the Viewsonic only has 1920x1080 worth of physical pixels mirrors and in order to get the full 4K resolution (or more accurately 3840x2160) each mirror projects four pixels. DLP chips use mirrors to reflect the light and each pixel has its own mirror on the chip. The DLP chip in the 747 is a 1080p chip, so in order to get the resolution up to 3840x2160 it uses a pixel shifting technology that Texas Instruments (the makers of the chip) call XPR. The PX747-4K has a RGBW color wheel that helps boost the white light output. Single-chip DLP displays like the PX747-4K work by projecting light through a color wheel, then off of a bunch of tiny mirrors (usually one for each pixel) and then through the lens and onto the screen. The Viewsonic PX747-4K is a high brightness DLP (Digital Light Processing) projector with XPR technology, as mentioned above. But what is XPR, and should you care? Viewsonic PX747-4K – Design and Features The affordable price is due to the fact that these projectors don't natively output 4K, but instead use a technology dubbed XPR. Earlier this year, Optoma released its UHD50 4K projector, which was seriously affordable (for a 4K projector) at just $1,400, and now Viewsonic has followed with the similarly affordable PX747-4K (See it on Amazon). However, they may join their ML750 sibling on sites such as Amazon soon.The price of 4K televisions has reduced dramatically over the past couple years, but that drastic price drop has eluded the projector market until recently. The Optoma ML1080 and ML1080ST can be ordered from now at 'asking street prices' of US$999 to US$1,149 respectively, albeit through pro-grade presentation outlets such as Adtech Systems for now. The new Optoma ML-series projectors boast HDMI 2.1 as an output as well as USB type-C (with a second such port for charging) as well as a mini-USB port for the R232 remote control adapter found in the box. The projectors have a throw ratio of 1.2:1 (ML1080) to 0.78:1 (ML1080ST), enabling them to cast a 100-inch image on a wall that might be only 5 feet away. ![]() The US-market ML1080 SKUs are rated to do with a 1,200-lumen brightness rating for " an unrivalled image performance compared with similarly sized projectors". To that end, they are equipped with an " RGB triple laser" system for " accurate, cinema-grade colors". Optoma has picked up awards from bodies such as Red Dot and the iF foundation for making ML1080 and ML1080ST projectors that weigh only about 2lb (~907 grams (g)) apiece, yet are rated for " sharp color, incredible brightness, and flexible set-up features for various immersive installations and on-the-go professional environments". ![]()
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