JVC RS4500 (native 4K laser projector)

[mark_h]

Pardon my ignorance, but what is a LUT?

A LUT is a data Look-Up-Table...  used to calibrate displays.

http://calman.spectracal.com/creating-3d-luts.html

[AVSMike]

New RS4500 review: https://www.whathifi.com/jvc/dla-z1/review

[AVSMike]

Very nice! Love the 'circuit board' wall treatments!

It is a Diffusion plate in front of an absorption panel. Made by GIK Acoustics.
http://www.gikacoustics.com/product-category/alpha-series/

[Woof Woof]

Pardon my ignorance, but what is a LUT?

I am guessing Look Up Table

[Madfloyd]

So, Kris, did you get the projector and mount?

[Madfloyd]

Last night I watched the UHD version of Underworld (guilty pleasure  ).  I was in HDR mode, mid laser and when zoomed in I had to pull the iris out to 0.  I also used mode 2 of the DI and since the movie remained dark it worked really well. 

The image was spectacular.  Great detail, fine grain, I was VERY impressed.  On the bluray.com forums there weren't many people citing the UHD as a big upgrade over the regular bluray but the RS4500 really handled this well, much better than I expected.  I couldn't image how the image could be better.

Looking forward to my calibration tomorrow.

[ozhdht]

So, Kris, did you get the projector and mount?

He mentioned on the AVSforum thread that he put his back out a bit when he was unloading the 4500 with his wife. He's hoping to get it up soon as he's up to it.

[Madfloyd]

He mentioned on the AVSforum thread that he put his back out a bit when he was unloading the 4500 with his wife. He's hoping to get it up soon as he's up to it.

Thanks. I missed that because I was following the OTHER RS4500 thread over there (there are 2!).

[Kris Deering]

I got the 4500 up on Saturday. Have had a long weekend due to the back issues, which are slowly getting better. I'm seeing some weird results with the new dynamic laser implementation. If anyone here on the forum can help, I'd like them to look at two different scenes for me. Using the Blu-ray's of Star Wars The Force Awakens and Oblivion, send 1080p to the 4500 (not scaled to 4K). For Star Wars watch the opening sequence after the title crawl with the ship's shadow covering the planet and the small ships appearing from behind it. How does the dynamic laser do with this scene in your setup? For Oblivion, how does it do with the opening credits that are right after the Universal logo and before the flashback (there are only a few)? Any feedback on these would be appreciated.

[AVSMike]

Since I do not have those movies, I will ask Craig to look at Oblivion. He has that one.

[Madfloyd]

For Star Wars watch the opening sequence after the title crawl with the ship's shadow covering the planet and the small ships appearing from behind it. How does the dynamic laser do with this scene in your setup?

Here's what I noticed with Star Wars:

Laser mid, Dynamic iris mode 2.

1) As the final title crawl recesses the entire screen dims down in 2 discrete steps.
2) As the large ship engulfs the planet, the planet itself (and I assume the entire screen) dims down dramatically and fades to black.

With Dynamic Iris off:

1) the screen doesn't dim when the final titles are in the distance
2) Before the planet is in the scene, I see stars, then the camera pans down to reveal the planet (with dynamic iris it was a black screen!).   When large ship flys by the planet, the planet does not dim.... BUT the scene does NOT fade to black and I continue to see the large ship fly by as well as the smaller ones 'turn'.

Wow, this is really something.  It's like the dynamic iris completely closed the lens.

[Madfloyd]

For Oblivion, how does it do with the opening credits that are right after the Universal logo and before the flashback (there are only a few)?

I first watched with Dynamic mode 2 and saw the first title appear faintly, then the 2nd title appear, disappear and re-appear again.

With Dynamic mode OFF, I could see that the titles 'wipe' in from left to right and the 2nd title doesn't disappear & reappear again.

Is this what you're seeing?

[AVSCraig]

I got the 4500 up on Saturday. Have had a long weekend due to the back issues, which are slowly getting better. I'm seeing some weird results with the new dynamic laser implementation. If anyone here on the forum can help, I'd like them to look at two different scenes for me. Using the Blu-ray's of Star Wars The Force Awakens and Oblivion, send 1080p to the 4500 (not scaled to 4K). For Star Wars watch the opening sequence after the title crawl with the ship's shadow covering the planet and the small ships appearing from behind it. How does the dynamic laser do with this scene in your setup? For Oblivion, how does it do with the opening credits that are right after the Universal logo and before the flashback (there are only a few)? Any feedback on these would be appreciated.

Why do I need to send 1080p and not 4K ? Just curious as I don't watch any Blu-rays that way. I upscale everything in my UB900 by default. I have both movies - and I have Oblivion on 4K too, which I think looks pretty good, despite some of the criticism that disc has gotten.

[Kris Deering]

Why do I need to send 1080p and not 4K ? Just curious as I don't watch any Blu-rays that way. I upscale everything in my UB900 by default. I have both movies - and I have Oblivion on 4K too, which I think looks pretty good, despite some of the criticism that disc has gotten.

The dynamic laser does not go to full black if you send 4K, so I wanted to see if the things I'm seeing are only with a 1080p signal being sent vs a 4K.

[Kris Deering]

Here's what I noticed with Star Wars:

Laser mid, Dynamic iris mode 2.

1) As the final title crawl recesses the entire screen dims down in 2 discrete steps.
2) As the large ship engulfs the planet, the planet itself (and I assume the entire screen) dims down dramatically and fades to black.

With Dynamic Iris off:

1) the screen doesn't dim when the final titles are in the distance
2) Before the planet is in the scene, I see stars, then the camera pans down to reveal the planet (with dynamic iris it was a black screen!).   When large ship flys by the planet, the planet does not dim.... BUT the scene does NOT fade to black and I continue to see the large ship fly by as well as the smaller ones 'turn'.

Wow, this is really something.  It's like the dynamic iris completely closed the lens.

Sounds similar to my results except I see the starts fine as the camera pans down after the title crawl. Things don't start getting weird until the ship covers the planet completely, and then it goes really dim then totally black then really dim despite stuff being on the screen. I'm surprised it totally blacks out here because there is clearly info on the screen. I will test this scene again today with a 4K input signal to see if it reacts better.