However, the XK did have very respectable contrast numbers with around native contrast and over in dynamic black mode. Also, like the XK the native contrast of the Xi was around , and in dynamic mode that number increased to just over Nexigo says the Aurora Pro can put out ANSI lumens and in my testing when paired with the Formovie Fresnel ALR screen it exceeds that with about lumens and an insane contrast ratio of just under In my non-gaming projector reviews I generally say that input lag under 20ms is good for competitive gaming, between ms is acceptable for casual gaming, ms starts to feel a little weird, and over ms can make some game types basically unplayable, but these gaming focused projectors are all about shaving off as much input lag as possible.
Testing with the industry standard Leo Bodnar lag tester you can see that the two projectors from BENQ and the two from ViewSonic added less than a tenth of a millisecond of input lag at 4K 60Hz, while the Nexigo Aurora pro added a little over 1ms and the Epson LS added about 3ms.
Increasing the refresh rate decreases the input lag and at p Hz the theoretical minimum is 8. Stepping up to p Hz the theoretical minimum is just 4. To test motion blur, I used the very popular UFO testing suite from Blur Busters and ran four tests on each projector.
First were the subjective tests, and I connected each projector to my RTX gaming computer, set them to their maximum refresh rate and started with Blur Busters Test UFO frame rate comparison. I gradually increased the speed of the UFOs, tracking them by moving my head and eyes until I could see noticeable motion blur, and this was pretty mind blowing to me because I was able to increase the speed all the way up to pixels per second before I noticed any blur on the ViewSonic and BENQ projectors at p Hz and frames per second, and the Nexigo Aurora Pro was only slightly worse, finally showing the slightest bit of motion blur at pixels per second.
The Epson LS on the other hand at p Hz was WAY worse and the motion blur was very noticeable at just pixels per second. To understand, we need to talk a little about how these projectors work. DLP projectors make an image by loading a single frame into their memory, and then breaking it up into red, green, and blue sub-frames.
