JVC RS4500 (native 4K laser projector)

[Madfloyd]

For anyone that has or is getting Ray Masciola's UHD /HDR - 10 test patterns, I find the last Resolution Pattern under Misc. Patterns - #09, Black Pixels Single - to work really well for focusing. Just FYI.

Thanks, I'll check that one out.

[AVSCraig]

Thanks, I'll check that one out.

With my 61 year old eyes, it can be tough getting the focus that last little bit tack sharp. This test pattern really helps dial it in. There are other useful ones too. I'll buy these on UHD Blu-ray too, when it comes out later this month.

[Madfloyd]

With my 61 year old eyes, it can be tough getting the focus that last little bit tack sharp. This test pattern really helps dial it in. There are other useful ones too. I'll buy these on UHD Blu-ray too, when it comes out later this month.

This is probably a silly question, but what's YOUR technique for focusing?  I simply try to get the spaces between pixels to show up (which obviously are very small so when you see the spaces it means the pixels aren't blurred). 

If this is not the optimum way to do it, I'd love to hear what is.

[jetsen]

It has been a while that I had the time to both play with my Z1 and reading and writing here, but today i had some time to do some more experimenting.
I still had an Isco 2 anamorphic lens but did not yet tested it with the Z1, to be honest i thought it would down grade a bit the excellent sharpness of the Z1 lens.
But oh boy, im i glad i spend some time putting it up in front of the beast, i was on max zoom because of the screen versus projector distance so now i just got a few cm more wich is great but not the reason why am so exited.
The image with the Isco just looks awesome, i have more light, picture looks sharper because i am not at max zoom of the Z1 lens. Only shame is the tiny bit distortion on top an bottom because i am now at the edge of the Isco lens, you can see it on test patterns but the way the image looks when watching movies makes you instantly forget about that.
With the firmware update of the laser dimming, the update on the Panasonic to adjust the clipping of the HDR, and now the iso, i am very pleased with the results.

Is anyone else using an Anamorphic lens in combination with the Z1, and if so do you also find it a good combo even if it downgrades the suburb lens quality of the Z1 a tiny bit?
i must say that in overall quality to my  eye i have a better looking picture.

[AVSCraig]

This is probably a silly question, but what's YOUR technique for focusing?  I simply try to get the spaces between pixels to show up (which obviously are very small so when you see the spaces it means the pixels aren't blurred). 

If this is not the optimum way to do it, I'd love to hear what is.

That was my technique. With the test pattern though, you have the entire screen covered in a grid of " dots " and it's really easy to see them tighten up in focus ! Far easier than looking at the pixels alone. At least to my eyes.

[Madfloyd]

It has been a while that I had the time to both play with my Z1 and reading and writing here, but today I had some time to do some more experimenting.
I still had an Isco 2 anamorphic lens but did not yet tested it with the Z1, to be honest t thought it would down grade a bit the excellent sharpness of the Z1 lens.
But oh boy, im I gad I spend some time putting it up in front of the beast, I was on max zoom because of the screen versus projector distance so now I just got a few cm more wich is great but not the reason why am so exited.
The image with the Isco just looks awesome, I have more light, picture looks sharper because I am not at max zoom of the Z1 lens. Only shame is the tiny bit distortion on top an bottom because I am now at the edge of the Isco lens, you can see it on test patterns but the way the image looks when watching movies makes you instantly forget about that.
Wist the firmware update of the laser dimming, the update on the Panasonic to adjust the clipping of the HDR, and now the iso, I am very pleased with the results.

Is anyone else using an Anamorphic lens in combination with the Z1, and if so do you also find it a good combo even if it downgrades the suburb lens quality of the Z1 a tiny bit?
I must say that in overall quality to my  eye I had a better looking picture.

I have an ISCO II installed and use it - not all the time - I still zoom sometimes, but as long I as back off the aperture a couple notches when I use the lens, it looks great.   I'm not sure I've truly a/b tested with lens vs zooming for 4k material yet (I probably should).  Anyways, I agree that the lens looks great and it sure is much faster than zooming.  Also, the second mode of the Anamorphic feature derives 16x9 with the anamorphic lens in place - so if you quickly need to see a 16x9 (e.g. for menus etc) it's even faster than my Cineslide!

[Madfloyd]

That was my technique. With the test pattern though, you have the entire screen covered in a grid of " dots " and it's really easy to see them tighten up in focus ! Far easier than looking at the pixels alone. At least to my eyes.

Cool, thanks for the reply, Craig.

[AVSMike]

It has been a while that I had the time to both play with my Z1 and reading and writing here, but today i had some time to do some more experimenting.
I still had an Isco 2 anamorphic lens but did not yet tested it with the Z1, to be honest i thought it would down grade a bit the excellent sharpness of the Z1 lens.
But oh boy, im i glad i spend some time putting it up in front of the beast, i was on max zoom because of the screen versus projector distance so now i just got a few cm more wich is great but not the reason why am so exited.
The image with the Isco just looks awesome, i have more light, picture looks sharper because i am not at max zoom of the Z1 lens. Only shame is the tiny bit distortion on top an bottom because i am now at the edge of the Isco lens, you can see it on test patterns but the way the image looks when watching movies makes you instantly forget about that.
With the firmware update of the laser dimming, the update on the Panasonic to adjust the clipping of the HDR, and now the iso, i am very pleased with the results.

Is anyone else using an Anamorphic lens in combination with the Z1, and if so do you also find it a good combo even if it downgrades the suburb lens quality of the Z1 a tiny bit?
i must say that in overall quality to my  eye i have a better looking picture.

I use an A-lens with my RS4500. Happy with the image I am getting.

[AVSMike]

I have an ISCO II installed and use it - not all the time - I still zoom sometimes, but as long I as back off the aperture a couple notches when I use the lens, it looks great.   I'm not sure I've truly a/b tested with lens vs zooming for 4k material yet (I probably should).  Anyways, I agree that the lens looks great and it sure is much faster than zooming.  Also, the second mode of the Anamorphic feature derives 16x9 with the anamorphic lens in place - so if you quickly need to see a 16x9 (e.g. for menus etc) it's even faster than my Cineslide!

Yeah, I use the anamorphic B setting for the same reason, to quickly see a menu.

[AVSCraig]

This is probably a silly question, but what's YOUR technique for focusing?  I simply try to get the spaces between pixels to show up (which obviously are very small so when you see the spaces it means the pixels aren't blurred). 

If this is not the optimum way to do it, I'd love to hear what is.

By the way, I did a little experiment last night to see if my RS4500 kept perfect focus shifting from my 2.35:1 lens memory, back to my 16:9 lens memory, and then back to the 2.35:1 lens memory. My conclusion is you should probably re-focus if you want it tack sharp. I just keep Ray Masciola's UHD /HDR - 10 test patterns on a thumb drive plugged into the front USB port on my Panasonic UB900.  Pretty fast to pull up that focusing pattern ( Resolution Pattern under Misc. Patterns - #09, Black Pixels Single ) and fine tune it to perfection !

[DavidHir]

By the way, I did a little experiment last night to see if my RS4500 kept perfect focus shifting from my 2.35:1 lens memory, back to my 16:9 lens memory, and then back to the 2.35:1 lens memory. My conclusion is you should probably re-focus if you want it tack sharp. I just keep Ray Masciola's UHD /HDR - 10 test patterns on a thumb drive plugged into the front USB port on my Panasonic UB900.  Pretty fast to pull up that focusing pattern ( Resolution Pattern under Misc. Patterns - #09, Black Pixels Single ) and fine tune it to perfection !

Sounds similar to previous JVCs.  When I owned the LS10000, the defocus was really bad when shifting to another memory.  So bad that  I could see it on content from my seated position!

[AVSCraig]

Sounds similar to previous JVCs.  When I owned the LS10000, the defocus was really bad when shifting to another memory.  So bad that  I could see it on content from my seated position!

No sooner did I say this, and after watching " Birdman " with my wife ( she'd never seen it ) I switched the screen to the 2.35:1 screen, since I have friends coming tomorrow that have never seen " John Wick " ( the first one ). I test the focus with the focus pattern and it's dead nuts on ! The moral of the story is just check it and make sure for best results !

[mark_h]

It does seem quite random - I can go multiple films with it fine, and then it drifts.  I check every film out of habit now.  Wish I didn't have to, but hey ho.

[AVSMike]

It does seem quite random - I can go multiple films with it fine, and then it drifts.  I check every film out of habit now.  Wish I didn't have to, but hey ho.

You guys are making me appreciate my A-lens even more.

[AVSCraig]

You guys are making me appreciate my A-lens even more.

I wish I had a longer throw so I could use one, but my throw distance presents distortion problems. Oh well.