Anamorphic Lens for Sony VPL-VW1000ES - Page 2 - AVS Forum
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post #31 of 39 Old 04-24-2013, 09:32 AM
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Quote:
Originally Posted by d.j. View Post

A funny thing is, that on the Sony 84" UHD tv the RC does work with a native 4K signal (adding text - its on a 3840x2160P signal ) - but it does almost nothing to the picture (and picture is already so good, that there is really NO need for sharpness manipulation etc.) only a very almost invisible change to gamma and sharpness - which I can live happy without, but I really would like motionflow to work, because it working very good IMO on 2K stuff.

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No chance for a software update for motionflow at 4K. The beast doesn't have anywhere near the computational power to do this at 4K.

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post #32 of 39 Old 04-25-2013, 03:38 AM
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Quote:
Originally Posted by mark haflich View Post

No chance for a software update for motionflow at 4K. The beast doesn't have anywhere near the computational power to do this at 4K.



I know, I just wish that they had implanted the same passive 3D system in the 1000ES, that would have made it perfect in 3D and overcome the two most annoying things with it IMO : the realtive heavy glasses and the big light output loss !

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post #33 of 39 Old 09-16-2013, 07:06 AM
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Anyone know if the upgrade will add 4k aspect controls for anamorphic lenses?
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post #34 of 39 Old 09-16-2013, 06:52 PM
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Don't know, but shortly, you will be able to go with a 4K lumagen.

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post #35 of 39 Old 01-03-2014, 05:56 PM
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Originally Posted by imobus View Post

Yes, I have Sony 4K projector and feeding it from PC with 4K signal. Also I am using ISCO 1.33 anamorphic lens.

Projector has all anamorphic support under 1080 resolutions, when you switch to 4K resolution the option is gone.

That sucks, I prefer the lens (ISCO lll) you can switch back and forth between the movie and menu for example in under a second, try that zooming. When you use the zoom method isn't the image 80% larger? that will reduce brightness considerably, with my lens the brightness doesn't change much at all. and it's razor sharp.

imo

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post #36 of 39 Old 01-03-2014, 05:58 PM
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Originally Posted by mark haflich View Post

Not yet, but lumagen will have one within a year.

Are are you going to feed a 4HD or 4K signal in? Are you doing it now? There are two anamorphic stretch settings one can select in the 1000ES. The one for 4K is the 1.25 one or close to that I don't remember exactly. Everything thing is different because the native chip aspect is 1.89 not 1.78. For 1.78 one uses the 1.33 stretch. A true 1.24 anamorphic will set you back a lot. Rather than zooming by the projector, that lens does a horizontal zoom leaving the 1.24 stretch alone. So with an anamorphic you are still zooming, but the zooming is done by the second lens. One lens is better than two stacked and very special set up requirements are imposed to keep the first lens exit image small to use the sweet spot of the anamorphic. With a 4K projector having the projector zoom which it does both vertically and horizontally is not a bad solution. You really don't gain a hugh amount of light with the vertical strech and avoid other nasties. Also a lot lot cheaper.

Are you sure the stretch function won't work with an HDMI in 4K?

I think if your lens is 1.33 then you use 1.33 regardless of resolution. it is the stretch ratio you are using.
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post #37 of 39 Old 01-03-2014, 06:07 PM
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The stretch functions in the Sony are disabled if you feed in at UHD or 4K. I do not use an anamorphic lens but if you set the Sony to normal aspect (1.78 for UHD), the stretch would be 1.32 or 1.33 provided externally for a UHD or 4K feed.. Unless you get the top of the line 4K Isco for $15K or whatever, which indeed is a 1.25 horizontal optical stretch, I would not use an anamorphic.

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post #38 of 39 Old 01-03-2014, 06:32 PM
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HI Mark,

Widescreen 4K will probably be UHD, still 1.78:1 so a 1.33 lens is still valid. I know Sony used the true 4K chip resolution but the masses won't, so unfortunately the content wont. Also according to Schneider Optics the ISCO lll is fully 4K capable in lens resolving power. (that is what they told me by email)
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post #39 of 39 Old 01-07-2014, 07:03 AM
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Due to the 1.9 native aspect and difference in zoom when using a 1.33 lens, the brightness change is pretty much a wash between stretch mode and 2.35 mode.

I had a UH480 lens but sold it.

Here's what I saw, aside from the neutral brightness change:
1) Significantly increased on/off contrast, due to the difference in zoom reducing the aperture.
2) Significantly decreased ANSI contrast, particularly when using a closer throw and more of the lens, but this was improved when using a longer throw.
3) Very slightly reduced pixel sharpness. This could be improved by tuning the color registration with the lens in place (at the expense of color registration with the lens removed). I'm talking about a fraction of a pixel, not something you could see at normal viewing distances, but you could see it when you walk up to the screen.
4) Significantly reduced effectiveness of upscaling sharpening, when used with the internal stretch. This disappeared when I switched the JRiver/MadVR as my source and used it for vertical stretch. This also improved the 2.35 scaling mode without a lens. This was all with 1920x1080 output. I don't have a 4k video card.
5) Typical a-lens geometric distortions and other headaches.

So, assuming you are using a good external source and scaler like JRiver/MadVR, trading ANSI contrast for on/off contrast was the biggest difference I saw. In my judgement, it wasn't worth the a-lens cost or headaches.
A 1.25 lens would give a significant brightness boost, but good ones are really expensive, and the brightness boost would be only half of what you get with a 1.78 native aspect projector.

I'm curious how one of the variable aspect Prismasonics would work out when set to 1.25, but not curious enough to buy one. It might be a good combination for a long throw, with the projector in the back of the room.
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