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The new C3X1080 review. - Page 2

post #31 of 877
Quote:
Originally Posted by Free View Post

Has the vertical lens shift been improved at all? I mount on a high rear shelf in the upright position, and have to use keystone correction due to the limited shift on Sim2 projectors.

Hopefully Alan R. will give more detail on this, but what I was told is that the vertical LS is "less than that available on the 5K." (The 5K allows lens placement at the very top, or very bottom of the screen image (100% off center), so the C3X will be something short of that, assuming what I've been told is correct).

Jim
post #32 of 877
The problem is that I put the projector in a hush box right side up. If I mount it upside down, there is no problem, but I didn't design the box that way.

I have no problem with my RS1 or my Sharp 20K because they have plenty of lens shift, but with the Sim2 projectors I have used, it was necessary to raise the rear with a block of wood, and there were keystone issues.
post #33 of 877
Quote:
Originally Posted by McCall View Post

Can anyone at CEDIA tell me if the screen at the demos for the Sim2 is an SMX screen by any chance? Ruben said they might be using one.

Sim2 was using a Stewart Firehawk cinemascope screen. Looked great.
post #34 of 877
Quote:
Originally Posted by Free View Post

Question for Alan Roser. Does the new C3X use the same variable lamp intensity setting as the old one?

I experienced bulb flicker with a C3X I owned, and experienced it in a 3000e that I demoed. It appears to be an issue related to the variable lamp output adjustment, and the lamp ballast. Adjusting the output, can make the problem go away, at least temporarily.

Has anything been changed to adress the issue of bulb flicker in this new projector, and the 3000e?

Flicker is generally related to the movement of the arc and usually settles down after some hours, if it persists then the usual remedy to to replace the lamp.

The latest generation of lamps in use appear to be exceptionally stable and yes the lamp is adjustable in 10 watt increments from 200 watt to 250.
post #35 of 877
Thanks for that information Alan. Can you comment on what you have measured the C3X 1080 at, in terms of CR, with the iris closed?

I think I read you said "Over 10000:1 at 2000 Lumens".

With the iris closed, I think I also read that the brightness was around 1000 lumens. Does it approach 15000:1 with the iris closed, and bulb on low, and what would be the expected lumens in that configuration?
post #36 of 877
Quote:
Originally Posted by Free View Post

Thanks for that information Alan. Can you comment on what you have measured the C3X 1080 at, in terms of CR, with the iris closed?

I think I read you said "Over 10000:1 at 2000 Lumens".

With the iris closed, I think I also read that the brightness was around 1000 lumens. Does it approach 15000:1 with the iris closed, and bulb on low, and what would be the expected lumens in that configuration?

To be honest Phil, the units used at the show are engineering samples and we know there will be further improvements and additional measurements will be taken so I'd rather not comment on anything further until I see the final specs.
post #37 of 877
OK, I understand. Thanks very much for participating here, and providing straight answers to all our questions.
post #38 of 877
Phil,

The Iris in the C3X 1080 is not dynamic (no open/close).
post #39 of 877
I see, that is too bad. Some people, like myself, might prefer a little more contrast and less brightness, so it is too bad it is not adjustable.
post #40 of 877
Quote:
Originally Posted by Free View Post

I see, that is too bad. Some people, like myself, might prefer a little more contrast and less brightness, so it is too bad it is not adjustable.

It IS adjustable. Its not dynamic. It is 1000-2500 iris dependant
post #41 of 877
Well... that is good news now. So just to summarize, the bulb is variable between 200-250w, and the iris can be manually adjusted as well. With the Bulb set to 200w, and the Iris clamped down all the way, the projector is rated at 1000 lumens, probably quite a bit less at D65?
post #42 of 877
Quote:
Originally Posted by Free View Post

Well... that is good news now. So just to summarize, the bulb is variable between 200-250w, and the iris can be manually adjusted as well. With the Bulb set to 200w, and the Iris clamped down all the way, the projector is rated at 1000 lumens, probably quite a bit less at D65?

probably 700-800 lumens with 11000-12000 CR.
post #43 of 877
Quote:
Originally Posted by Free View Post

Well... that is good news now. So just to summarize, the bulb is variable between 200-250w, and the iris can be manually adjusted as well. With the Bulb set to 200w, and the Iris clamped down all the way, the projector is rated at 1000 lumens, probably quite a bit less at D65?

I've been led to believe the production models will be 1000-2500 iris dependant @ D65. Time will tell
post #44 of 877
Quote:
Originally Posted by MC6 View Post

probably 700-800 lumens with 11000-12000 CR.

Out of interest, on your HT3000e when you are dialed in on the CIE what figures do you get for the parameters?

Thanks
post #45 of 877
Quote:
Originally Posted by coldmachine View Post

Out of interest, on your HT3000e when you are dialed in on the CIE what figures do you get for the parameters?

Thanks

I set my white point to
x -->0.313
Y -->0.329
D6500k
Duv=0

is this the figures you were looking for?

thanks
Mike
post #46 of 877
Quote:
Originally Posted by MC6 View Post

I set my white point to
x -->0.313
Y -->0.329
D6500k
Duv=0

is this the figures you were looking for?

thanks
Mike

Yes. I was wondering how accurately dialed everyone was getting dialed in. I'd got a few pm's regarding white points and the new CMS.
post #47 of 877
Just one point but the original spec on the HT 5000 was 2000 lumens but it is right around 1200 at D65.This is even before working with the CMS which will likely further reduce the actual lumens.

Art
post #48 of 877
Quote:
Originally Posted by Art Sonneborn View Post

Just one point but the original spec on the HT 5000 was 2000 lumens but it is right around 1200 at D65.This is even before working with the CMS which will likely further reduce the actual lumens.

Art

My own experience is similar on the 5K.

I was told that (lamp ageing aside) that the production models wont dip below 1000 at D65 with the iris down. The original spec was to have been 1200-2500 but due to the single chippers maintaining high brightness at D65 then they'd spec the D65 figures on new 3 chippers. There was word that the CR spec was being raised as well as that of the HT380.
post #49 of 877
Quote:
Originally Posted by Art Sonneborn View Post

Just one point but the original spec on the HT 5000 was 2000 lumens but it is right around 1200 at D65.This is even before working with the CMS which will likely further reduce the actual lumens.

Art

Art

Did you ever measure the CR of the HT 5000? BTW your new scope setup looks stunning.

Mike
post #50 of 877
Quote:
Originally Posted by Art Sonneborn View Post

Just one point but the original spec on the HT 5000 was 2000 lumens but it is right around 1200 at D65.This is even before working with the CMS which will likely further reduce the actual lumens.

Art

2500 should have been imho. given the price of the machine, one would want an accordingly large screen to project on 13-15ft wide
I and i'm not alone make a direct corelation between lumens and screen size and budget.

i hope the C3X can "keep" 1500ansi lumens at 6500k
but at least SIM2 tries, as the marantz sharp benq jvc sony etc are stuck at 300-650lumens. the C3X has been clocked various presses from 990 to 1700ansi at 6500K
post #51 of 877
Quote:
Originally Posted by coldmachine View Post

Yes. I was wondering how accurately dialed everyone was getting dialed in. I'd got a few pm's regarding white points and the new CMS.


How does this work? Do you measure the native primaries and white and enter those values as reference or is that done at the factory? If it's done at the factory, how do you compensate for spectral shift of the screen and port glass, if glass is used?
post #52 of 877
Quote:
Originally Posted by odyssey View Post

How does this work? Do you measure the native primaries and white and enter those values as reference or is that done at the factory? If it’s done at the factory, how do you compensate for spectral shift of the screen and port glass, if glass is used?

The measurements of the native gamut are initially done at the factory; however, you can measure them yourself and enter these values into the CMS and the system will then use your measured values as the reference.
post #53 of 877
The white point is set using the user menu. It's like a colored 3D CIE chart. There is a cross hair you move vertically or horizontally to set temp,x,y and Duv.

If using the CMS its as 4444 stated. Look here
http://www.avsforum.com/avs-vb/showthread.php?t=889102
post #54 of 877
Quote:
Originally Posted by Citation4444 View Post

The measurements of the native gamut are initially done at the factory; however, you can measure them yourself and enter these values into the CMS and the system will then use your measured values as the reference.

Do they measure each unit or assume that there is insignificant variation?

I wonder how many installers have instruments that can accurately measure primaries from the screen?
post #55 of 877
Quote:
Originally Posted by odyssey View Post

Do they measure each unit or assume that there is insignificant variation?.......

To my knowledge they measure each unit and these measurements are saved by Sim2 by serial number. I know because I've had a couple of occasions where Sim2 gave me the initial measurements so I could determine if a customer had been messing around in the service menu.
post #56 of 877
Quote:
Originally Posted by Citation4444 View Post

To my knowledge they measure each unit and these measurements are saved by Sim2 by serial number. I know because I've had a couple of occasions where Sim2 gave me the initial measurements so I could determine if a customer had been messing around in the service menu.

Correct. Every machine gets a "Birth certificate"
post #57 of 877
Quote:
Originally Posted by coldmachine View Post

Correct. Every machine gets a "Birth certificate"

I am sorry but there is no such thing as Birth Certificate and pre calibration possible in 3 chip dlp. You have to account for the screen/room/porthole effect.
post #58 of 877
Quote:
Originally Posted by ygoh View Post

The DLP DarkChip 4 Theater features a 3 chip, 1080p DLP projector featuring the new chipset producing trillions of colors combined with a native contrast ratio of 15,000:1. '

That is totally untrue 8k maximum, which is double what is needed. That was a great looking cx-3 dc4 unit with no* green blooming issues BTW.

* not more than the minimum occasionally acceptable as evidednced cross manufacturers.
post #59 of 877
Quote:
Originally Posted by odyssey View Post

I wonder how many installers have instruments that can accurately measure primaries from the screen?

Certainly not as affordable to them as to certain Medical Imaging mavens that have hundreds of thousands of dollars in instrumentation laying around...
post #60 of 877
Quote:
Originally Posted by MC6 View Post

Art

Did you ever measure the CR of the HT 5000? BTW your new scope setup looks stunning.

Mike

Rough number using the L3 was 5000:1.


Art
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