I'm doing a blog on my journey which hopefully ends up in me having a 4k home cinema. Not quite relevant to the projectors in this thread but I've been through some top spec PJ's lately and I've detailed my findings (Sony VW85 - JVC X70 (RS55) JVCX90 (RS65) We all love projectors here so some of you may find it interesting!
You can see it here:
This is my latest post when I've just opened up the X70 and compared it to the X90:
Ladies and gentlemen, may I have your attention please!
In the red corner, weighing it at 35lbs, we have the JVC X70!!!
In the blue corner, weighing in at 35lbs, we have the JVC X90!!!
In the green corner, weighing it at 32lbs, we have the Sony VW85!!!
X70 right, Sony VW85 middle, X90 left:
X70 showing off its fresh out of the box high gloss finish:
1st thing was to set it up the X70 just like my X90. Throw distance the same, aperture at -15 and then into the AVS test disk. The basic brightness and contrast in THX mode was identical to the X90, just 17 black flashing and clipping white at about 237:
Next up was convergence. From the seating position, the X70 and X90 look identical - i.e, fantastic! Not a hint of colour in sight.
But we don't leave it at that, we stick our nose up to the screen to find out exactly how good it really is. This is where the X90 has the edge out of the box, convergence was excellent both seated and nose touching the screen. Here you can see that the x70 looks really good vertically, but you can see blue on the horizontal lines, with it being a little high above the white, and then at the bottom of pixel 2, we can see the white is a little yellow:
So I looked the whole way across the pattern and I was pleased to see the misconvergence was uniform the whole way across the screen. The blue stayed high on the line at the left, right, centre, top and bottom of the screen. This is a good thing. Likewise, the vertical lines were uniformly white everywhere too.
So into the menu I went, and moved blue down a FULL pixel horizontally and voila, a great result!
Now look at it!
So you can ever so slightly see a little colour here in the pic but its tiny. What you see is a combination of chromatic aberration from both my camera lens and the projector lens. In minimal. The X90 is slightly better again but we're splitting hairs now - very little in it.
The 1:1 pixel mapping shows sharpness between X70 and X90 is both great. Obviously this was done with e-shift turned off so I can see the pixels but nice and uniform all the way across the screen.
I also measured light output and both were almost identical here too, 1 to 2 lux difference at 100IRE white screen with zero hrs on bulb and because I measured on different days with the sensor not exactly in the same spot (close but I can't say for sure) I'll say that brightness was the same too.
This pic shows low lamp mode at aperture fully shut and my ambient lights are on and 106" screen size. This is about as dull as it can be made at zero hrs and you can see its still able to throw out a bright image: