Sorry, see my post above this one
post #3421 of 3741
2/28/11 at 11:53pm
I had the RS40 (X3) and now the RS50 (X7). My screen is the older 2.8 material and is 142" 16:9. My 2:35:1 viewing area ends up being 133" diagonal. I am not zooming for 2:35:1, I use masks on my screen which is a fixed frame Cinema Contour model.
My room is light controlled and the projector is 17 feet from the projector. I have the projector just inches above eye level for maximum gain. I am a brightness fanatic and for me, there is no such thing as too bright (within reason).
Like all UHP lamps, the new JVC's are going to lose their out of the box brightness after a few hundred hours. I am at 200 hours and it's definitely not as bright as it was when I first received it. I have a light meter and currently tracking the lumen output, but I can tell you it's nowhere near JVC's advertised 1300 lumens so you can't judge by any of the projector calculators unless you use a realistic (D65 calibrated) light output which is going to be in the 500-600 lumen range at the shortest throw. Some reports are coming in from previous owners stating the older models had higher calibrated lumen output than the new series.
The brightness in 2D and 3D are nice with the 2.8 @ 142" for now, but I'll have to wait and see how much more the lamp dims. I personally wouldn't use the new JVC RS/X series with a screen this large without a considerable amount of gain. For this combo, I think the 142" is as large as I would go with the new JVC's. That's a pretty big 2:35:1 screen you have there!
I've had my 106" model b pulldown (using 2.8 HP fabric) in storage for a few years. When I put it back up recently, I noticed some slight horizontal lines running through the image. They appear to be folds or wrinkles in the fabric. They run the entire height of the screen with spacing increasing as you get further down the screen (probably since the roller radius increases towards the bottom).
The issue is only slightly noticeable on very bright scenes or 100% full screen IRE test patterns.
To make it visible in photographs, I shined a flashlight parallel to the screen from the bottom or side edges. Projector is off and room is dark.
Can someone test their 2.8 pulldown to see if this issue was there originally or was caused by the prolonged storage? Thanks.