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Post by stridsvognen on Mar 22, 2019 17:52:47 GMT -5
If you can run 2160I 48hz ill guess around 230Mhz pixel clock, you have a projector that will smoothly run 1080P 72hz, you dont have tube or optical resolution capabilities above the 1920 horisontal pixels as it is, so its a little hard for me to understand the need to up the bandwidth load for something that wont add any resolution, heat up the projector and make it look softer than any 1080P you can trow at it.
4K is easy and trouble less downscaled to 1080P, the HDR to SDR convertion is a mess and will never be a hit.
Dont know what kind of light output you run on the barko, but all the tests i have done with 48hz was very very bad flickering on bright scenes, 60hz is almost flicker free, and 72hz have no flicker, but introduces other issues due to bandwidh limitations.
I thought the neckboard limitations on the Barcos was impossible to get around, are you running Gabors Marquee neckboard / DB board mods in the Barco.?
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Post by Casethecorvetteman on Mar 23, 2019 0:55:52 GMT -5
No im using Gregstv modded boards in my Barco and Eisemann sim tubes, which improved things considerably.
I havent measured light in ft/l so i dont know.
Flicker at 48Hz is very minor and hardly noticed, 60Hz there is none, and 72Hz looks basically identical to 60Hz.
2560x1600 @48hz still shows scanlines, so its not beyond the scope of being usable, and Windows text is still readable. It is softer than 1920x1080 though, youre right there.
Ive posted pics of 2560x1440 on here before and you can see theyre still quite sharp enough to be watchable.
Hows life been anyway Kurt? I had a really good laugh at you arguing with a bunch of guys on another forum about the HD Fury 4, funniest part was you were dead right and i dont know what they were thinking but they seemed to think it was the best device around... Lucky if you can even get the damn thing to work half the time.
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Post by stridsvognen on Mar 23, 2019 5:39:00 GMT -5
The HFQ900/ HD10E lenses dont resolve a 1080P image, and can not keep up with tube resolution, and its hard enough to get videochain speed up to do a decent 1:1 on off, scanlines are obviously doable, but what do it help to have scanlines if the videochain is not fast enought to modulate the signal. Another thing is how the videochain responds to gain and resolution, the pattern below is very good to evaluate that. To evaluate a mod ill say its a must to always know your light output, so can establish a reference level, as the performance will vary a lot depending how you drive the videochain and tubes.  |
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Post by Casethecorvetteman on Mar 23, 2019 10:14:37 GMT -5
Yeah but i dont go that far into it, i care more about how it looks to my eyes, and im tellin ya, 2560x1440 certainly looked better for 720p material, it was much nicer.
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Post by stridsvognen on Mar 23, 2019 10:35:02 GMT -5
Have you tested 720P 72hz and then overfocus the tubes so your spot fill out the scanline gap, or even 96 or 120hz to soften up the image, and your projector will run colder and more stable.?
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Post by Casethecorvetteman on Mar 23, 2019 12:13:09 GMT -5
No i cant say i have
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