JVC RS4500 | ST130 G4 135" | MRX 720 | MC303 MC152 | 6.1.4: B&W 802D3, 805D3, 702S2 | 4x15 IB Subs
Do yo have the NX9 eshift on? If not, you should get a very sharp pixel grid just fine on that projector - assuming your screen material is up to the task. The pixel grid is how I actually finish fine focusing any JVC 4K projector we bring in my room. With eshift disabled, the 4K pixel grid on the NX9 was quite visible and sharp here.I don't want anyone to think the lens found on the 915ES is bad. It's very, very good. Convergence on my review unit is probably the best I've seen from any Sony projector to date. I had to make one small adjustment and it's now essentially perfect. Pixel delineation is quite good too. As is focus uniformity. See the attached photo of the 915ES.
My NX9 is just a little better at focusing down on pixels. Convergence on my NX9 is not as good as this 915ES. But from a seated distance back you can't see the small deficiency in convergence, so it's a non-issue. It's also a bit difficult to post comparison pictures because the JVC models have better pixel-fill performance. It's to the point where you can't really see much of a pixel grid. The pixels sort of just meld into each other, with almost no black boarder. The Sony's have a more distinct pixel grid upon close inspection.