The 3600 lumens of claimed brightness should help the projector get more impact out of HDR than many projectors – provided the contrast lives up to its billing as well. Resolution 3840 x 2160 via double flashingĪs with most HDR-capable projectors, the UHD55’s HDR format support includes the HDR10 and HLG formats, but not the more advanced Dolby Vision or HDR10+ systems.
Two dynamic picture modes are provided: Dynamic and Eco+. This latter figure, though, will be the result of a heady combination of optimism and dynamic light management, meaning you’ll almost certainly never get close to such a contrast ratio during real-world viewing. It also claims a seriously high peak brightness of 3600 lumens and an even more promising contrast ratio of 1,200,000:1. The UHD55’s 4K resolution isn’t the only big number on its spec sheet.
Some will argue that this isn’t true 4K, but the Consumer Technology Association in the US reckons it qualifies, while our own experiences suggest it can deliver a much closer-to-true-4K image than other ‘pseudo’ 4K approaches.īeyond the handy physical image set-up tools discussed already, the UHD55’s menus include a surprisingly sophisticated, multi-point image geometry adjustment that potentially allows you to compensate for bulges in your wall, as well as a series of wall colour compensation options. In truth this means that a 4K image is created by multiple flashes per frame of a less-than 3840 x 2160 roster of the DLP’s digital mirror devices. Turning our attention to the UHD55’s innards, it uses a single-chip DLP optical system delivering a claimed 4K resolution. An attraction it bolsters by keeping input lag to an impressively low 16.9ms when running in its Enhanced Gaming mode. The HDMIs support 4K at 60Hz or HD at 120Hz, making the projector potentially attractive to gamers. This is rated to 10W, more than you get with most integrated projector sound systems, but it only feeds into a single mono speaker. These latter ports alert us to the presence inside the UHD55 of a built-in audio system. The large lens delivers a throw ratio of 1.21:1-1.59:1 and a solid 1.3x level of optical zoom, while connections include two HDMIs, three USBs (one for 5v output or service use only), a VGA port, an RS-232C control port, a 12v trigger port, an optical audio output, and a 3.5mm phono audio loop through. Working our way from the Optoma UHD55’s outside in, it’s great to find a projector this affordable providing vertical image shifting to help you get pictures in the right place without having to mess about with image-distorting keystone correction.