LG Ultrafine™ OLED Monitor (27EQ850) – 27 inch 4K UHD (3840 x 2160) OLED Pro Display with Adobe RGB 99%, DCI-P3 99%, 1M:1 Contrast Ratio, Hardware Calibration, Multi-Interface, USB Type-C™ (PD 90W)

As a videophile going back to the 1970s, I've owned a number of professional monitors from the likes of Tektronix and Sony. I've been looking for something with exceptional quality in the under 30-inch range, as there is nothing whatsoever that fits that bill when it comes to consumer televisions. Thus, I was intrigued when I heard about this 27-inch LG OLED, as it seemed to be just what I was wanted. I held off buying it for some time, not quite sure if it would live up to my expectations. All I can say is, it exceeds my expectations in every regard.I am using this as one might use a television, with sources ranging from DirecTV to Apple TV 4K. I am pleased to report that it excels with ALL sources. It upscales beautifully from 1080i, with no visible artifacts. 4K content from the Apple TV looks absolutely stunning -- it's like looking out a window. To appreciate all the detail really requires a magnifying glass.Color rendition is first-rate, displaying a range of colors that simply aren't seen on LCD screens. Being an OLED, of course the blacks are perfectly black. I'm not a fan of HDR, so I've been viewing only in SDR, and the monitor affords more than enough light output -- I even had to reduce the brightness from the factory settings as it was brighter than I like.I appreciate the fact that being a "pro" monitor, it doesn't have any annoying "smart TV" features. Turn it on and whatever is at the input is immediately displayed. There's also no need to go through a ton of menus to disable all the junk that plagues consumer TVs -- stuff like noise reduction, motion interpolation (which creates the hideous "soap opera" effect), and the like. It just looks RIGHT, without all that sleaze. Since this monitor is intended to present "the truth" to content creators, that is as it should be.I've seen some other reviews that mention uniformity issues, but I'm not seeing that here. A flat white field looks uniformly white from edge-to-edge. Perhaps there are variations between samples?Simply put, I'm extremely picky about displays, and I'm 100% pleased with this monitor. Highly recommended.

Wow, what a gorgeous display. Never seen anything like it. The whites as so white and the blacks so black. OLED is the real deal. Really exceptional color controls, excellent pixel size without gaps. Incredibly sharp. If you have a single monitor setup or are viewing this from far away, this is the display for you. 100% full range dimming on each pixel is amazing, as is the 10-bit color and full set of device interfaces (USB-C DP Alt Mode, HDMI and 2x display port. So good.The color is exceptional. The display really hits those fluorescent orange tones that I haven't seen anything else reproduce since the Dell UP2715K came out. Color controls are straight forward and useful, but not overly complex. Display remembers color modes for each interface which is really nice.Sadly if you have a two display setup and you sit in-front of one, there are major color shift problems at around 45 degrees where the other display would normally be. At that angle the color temperature gets very warm (excessive red). At an additional angle it normalizes and then has a hard shift to being very cool (blue) with a nasty gradient.I have compared this monitor to the Apple XDR, Apple Studio Display, Dell UP2715K, Dell UP2720Q and LG 27MD5KL-B. For a single monitor setup or a situation where I could sit further away from the display I would choose this one in a heart beat out of all of those.Unfortunately I do color grading so I can't tolerate the color shifts and am returning the display. My next choice would be the LG 27MD56KL-B which does not color shift even at extreme angles.Calibration out of the box was really off, and had poor repeatability comparing the two monitors I received, but can be adjusted with a calibrator - not the end of the world, but should be a lot better given the price.

Let's start with the bad: if you're hoping to use this on macOS while leaving HDR enabled then please don't buy it.On macOS the brightness of SDR content (UI/desktop) is set extremely low and unadjustable (100nits it seems), which makes it unusable for office/productivity use unless you're in a pitch dark room (and even then the brightness is still rather low). Effectively your only choices on macOS to have HDR enabled all the time are to use either the MacBookPro 14/16" with XDR display, or the very affordable $5-6 Apple XDR display (plus the lovely $1K stand, + tax).On Windows you can control SDR brightness relative to HDR content; UI's color/contrast will be as usual (with HDR monitors) a bit washed out but you can 'fix' that further using your graphics's card settings.It is however gorgeous for viewing HDR videos, gaming in HDR.The picture quality is fantastic in SDR mode, but at that point the difference with an IPS 4K screen that costs a fraction of its price is not that drastic in a normally lit room. Compared to my Dell U2720Q the black are indeed black on the LG OLED but you really notice the difference in a darkly lit or pitch black room (at that point the typical IPS glow of the Dell panel makes black grey-ish looking).Build quality for the ports at the back of the screen is questionable; it feels like the ports are going to bend/fall off every time you plug something into them.

I do a lot of photo editing and the picture quality of this monitor is excellent. Works great for me!

The two display ports on the monitor don't work at all. Luckily the HDMI port and USB-C ports worked. I have both a home computer and work computer that I swap between so its very important that I have at least two ports on a monitor functional. It is not a great sign that two out of four don't work out of the box.The visuals and everything seem great. I'm not an expert or anything so I can't say for certain, but to my eyes its what I was expecting for the price.