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Contrast - This will vary depending on the image. I have pointed out this review to you several times:

http://cine4home.de/benq-w5700-vs-epson-tw9400-das-grosse-duell-der-4k-hdr-wohnzimmerbeamer/

where the contrast of actual images, as seen by the viewer, are measured.

In brightly lit images there is no doubt that DLP has higher contrast and this will be true for even the most expensive JVC DLA projector. In darker scenes the TW9400 does better, but not that much better. Colour and overall IQ are again subjective but it will not always favour one projector over another. A properly exposed nature documentary, for example, will probably have higher per frame contrast on a DLP projector such, as the UHD50, than on a much more expensive, 3LCD or LCOS projector, simply due to the lower ANSI contrast of non-DLP displays.

Another DLP advantage is explained here:

The reason the Theo-Z65, which uses a DLP single chip, can equal or exceed the detail of the native JVC is the 3-chip alignment challenges, and a technical limitation of liquid crystal technology called “Fringe Field Effect.” Basically, the rise time or depth of modulation on a liquid crystal display is somewhat limited by the layer of liquid crystal which cannot turn on and off as cleanly as a digital DLP device.
https://www.tvspecialists.com/jvc-dla-nx7-vs-epson-pro-cinema-6050ub-vs-tvs-pro-theo-z65-part-i/


Are there areas that 3LCD or LCOS might do better? Yes, but again, in a properly setup projector and video source, the differences are likely to be subtle and if they're not subtle then something isn't setup correctly. This is why I always look for problems in setup when people complain about IQ.
The fact that you would suggest that differences between DLP and 3LCD/LCOS are subtle is ridicolus. For the sake of other users I'll try to explain as best I can.


The DLP projectors given in the examples are some of the best DLP models. The kind of 4K DLPs that people usually buy are of lower quality, like the one this thread is dedicated to.

In the cine4home article the W5700/HT5550 is tested against the TW9400 (6050UB) with the Epson's iris turned off. No iris is perfect, and reviews have noted issues with both models. The room is also not treated, which affects the Epson more than the Benq, in low ADL scenes.
This is not a fair comparison, so it's discounted.


Sharpness:

Most new users, towards which these budget machines are aimed at often choose smaller screen sizes and/or sit too far away. Not to repeat myself, but all of these units are sharper than 1080p, which makes the extra resolution of secondary importance.

Some might also look at that quote and think that the advantage claimed by the reviewers (even when sitting close enough) is somehow relevant to overall experience when compared to a creme de la creme projector like the NX7. That quote without context is disingenuous because it tries to elevate the importance of sharpness/details off the coattails of the comparison with the JVC, and to imply that even a lowly UHD50 can do what the Z65 does, i.e. compete with NX7.

It's disingenuous that you dedicated such a large portion to the post to this issue to a discredited issue, that of the need to have DLP level sharpness and that other tech is not good enough:
https://www.avsforum.com/forum/68-d...p/3100362-4k-pixel-shifting.html#post58821002



Contrast and black level:

Your post misrepresents the type of content that is generally consumed from the point of view of ADL, and as such the contrast performance.

From the article: http://projectiondream.com/en/movie-brightness-adl-contrast-measurements/
Definition: ADL= Average Display Luminance (on screen brightness after gamma correction of 2.2)

The average ADL with the black bars is 8.0%.
Our results (with black bars) show that the most important contrast values are the ones measured on patterns with a ADL luminance up to 20%. With this we have covered about 90% of all pictures found in movies!

It also means that between 20% and 100% ADL there are only 10% of all analysed picture! The ANSI contrast with 50% ADL does really not speak for the brightness reality that we observe in our favorite movies…

On the other hand, under 1% ADL we already have more than 11% of the analysed pictures, which is more than between 20% and 100% ADL all combined together!

We have 80% of all movie pictures below 13% ADL luminance and 50% of all pictures below EVEN 5% ADL luminance.



So to recap, 11% of scenes are under 1% ADL, 50% are under 5%. This is what 5.9% ADL (with black bars, as most movies have them) looks like:




So how does this relate to projector performance?

This article describes three projectors, with native contrast of ~1600:1 W1070, 4500:1 TW9200 (5030UB), and 12000:1 WV520ES. The dynamic iris value is not noted.
https://projectiondream.com/en/contrast-projector-environment/

However, this does not stop here. We can extrapolate the differences if dynamic lamp and iris were used. In this case the dynamic contrast of the W1070 would be ~4500:1, and of the TW9200 over 30 000:1.
So consider the W1070 with dynamic lamp mode instead of the TW9200 (in the chart), and the TW9200 as better performance than the Sony. After 5% ADL the differences are significant.

The average living room is not white walls, but far from perfect. Even in these conditions, the models with higher contrast show significant improvement vs. DLP after 5% ADL.

Not sure if there are more than 5 DLP projectors with active iris for sale right now. Dynamic lamp can be slow and not frame precise.

The UHD51A has a native contrast of ~475:1, with ~1000:1 with dynamic lamp and ~1700:1 in HDR.
Benq HT3550 has ~700:1 with ~1700:1 with iris.
HT5550 has ~1000:1 with ~5000:1 with iris.
HC3800 has ~1700:1 native contrast with ~32 000:1 with iris.
5050UB has ~4500:1 with 37 000 with iris.

It's not just about contrast, but also the black floor. JVCs are not overly bright, yet they are capable of high contrast.


So let me ask you this, where do those bright documentaries that you mentioned lie in this? How much content that a regular user would watch will be bright enough so that DLP will have at least from a technical standpoint a better value?

And are you saying that a 3LCD/LCOS projector does not look good with that type of content?

If someone were to get a low contrast DLP projector they would have an advantage, assuming general consumption patterns, in a small percentage. But if they were to get a model with better contrast, that feature will improve the image in a much larger percentage of content watched. And these models still look good with bright content.

Epsons in particular, even though they may have lower ANSI contrast than DLP, can behave better in an ambient light scenario because they are brighter and have higher color lumens. They also have longer throws that ALR screens require. And brightness uniformity, also for ALR.

Yet you still recommend these low contrast DLPs. I've even seen you recommend one in a thread where the user had a literal bat cave. How can a UHD51 belong in a bat cave? Especially since the user had a high contrast Sony?

So with all this being said, would you personally still prefer an UHD50 over a high contrast projector?
 

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The fact that you would suggest that differences between DLP and 3LCD/LCOS are subtle is ridicolus.

It's disingenuous that you dedicated such a large portion to the post to this issue to a discredited issue, that of the need to have DLP level sharpness and that other tech is not good enough

Contrast and black level:

Your post misrepresents the type of content that is generally consumed from the point of view of ADL, and as such the contrast performance.
As I carefully explained the real world differences between all projector technologies is subtle, when the projectors are properly setup, regardless of the room treatment.

It's disingenuous to suggest that personal preference for sharpness is not a valid preference. My reference to the fringe field effect isn't just about sharpness.

Contrast: My post didn't misrepresent anything, and I explained carefully what I was stating. Contrast is one of the most misunderstood and terribly misused stats regarding projectors. Under ideal conditions the average person cannot readily distinguish contrast between ratios exceeding about 500-1. Any scene that has a highlight in it, is going to look very similar on just about any reasonably decent projector when compared under similar conditions. Yes some will look better than others, depending on the user's viewing preferences, but the differences are not going to be dramatic as these videos show:



The ADL levels are misleading as well, because they make the assumption that you can take ADL levels in a movie and then compare that to a black and white test target; you can't and one of the authors of the Projectiondream website agreed with me:

https://www.avsforum.com/forum/24-d...eviews-comparison-thread-58.html#post58207686

https://www.avsforum.com/forum/24-d...eviews-comparison-thread-58.html#post58208406

https://www.avsforum.com/forum/24-d...eviews-comparison-thread-59.html#post58210168

Real world content, even at very low ADLs will not always exhibit such a wide range in contrast ratio.
 

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Pauldustler: The only reason I want framepacked in my uhd40 is to be able to watch 3D movies in mpc-hc and madvr which doesn’t work with frame sequential. Watching movies with madvr is like day and night differences to watching it without (with powerdvd for example). Maybe you have other solution for me? Does there another way watching movies with madvr in frame sequential ?
 

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As I carefully explained the real world differences between all projector technologies is subtle, when the projectors are properly setup, regardless of the room treatment.

It's disingenuous to suggest that personal preference for sharpness is not a valid preference. My reference to the fringe field effect isn't just about sharpness.

Contrast: My post didn't misrepresent anything, and I explained carefully what I was stating. Contrast is one of the most misunderstood and terribly misused stats regarding projectors. Under ideal conditions the average person cannot readily distinguish contrast between ratios exceeding about 500-1. Any scene that has a highlight in it, is going to look very similar on just about any reasonably decent projector when compared under similar conditions. Yes some will look better than others, depending on the user's viewing preferences, but the differences are not going to be dramatic as these videos show:


The ADL levels are misleading as well, because they make the assumption that you can take ADL levels in a movie and then compare that to a black and white test target; you can't and one of the authors of the Projectiondream website agreed with me:

https://www.avsforum.com/forum/24-d...eviews-comparison-thread-58.html#post58207686

https://www.avsforum.com/forum/24-d...eviews-comparison-thread-58.html#post58208406

https://www.avsforum.com/forum/24-d...eviews-comparison-thread-59.html#post58210168

Real world content, even at very low ADLs will not always exhibit such a wide range in contrast ratio.

It's disingenuous that you've moved the goal post. It's not about you and your personal preference (regarding sharpness), but in general. I've written this two times already, yet you've ignored it:
For most users these 1080p+ models are sharp enough. Unless the screen is excessively large and or the seating position is close, resolution is not a problem. Additionally new users tend to be conservative when it comes to screen size.

This whole resolution is a red herring anyway, for the reason stated above. Resolution is a secondary or tertiary concern when it comes to picture quality.


Pretty sure regular users can distinguish between CRs higher than 500:1, or are you actually saying that folks cant' tell the difference between oled and lcd?
https://www.avsforum.com/forum/24-d...trast-measurements-thread-2.html#post56922262


I'm not going to dwelve into the details, including those in the links, but even your claim that he agreed with you is misleading, ESPECIALLY when compared to the point I was making:
High contrast projectors are de facto better at lower ADL content. Generally speaking.
50% of content in the study is under 5% ADL.
11% of content was under 1% ADL.
High ADL content on high contrast projectors has been described as good looking.

Therefore a projector capable of high contrast will be better than one that is capable of high ANSI contrast.

But I've written this before and you've just ignored it. I'm not even sure if it's worth continuing this conversation. I would like for this to be the last post of this reply chain since you refuse to acknowledge the facts.

More to the point: I have a W2000 which was referred to in that thread as the king of ANSI contrast. I've spent over 4000 hours on it. I don't have a good opinion of it. The largest issue by far is the very poor low ADL performance. Why? The elevated black floor. Those high contrast projectors are good at low ADL content precisely because of it (low black floor).

Where do you think that high contrast comes from? They are not super bright. It comes from the low black floor. It does not matter if in a low ADL scene the range is limited, it starts from the black floor upwards. And if the floor is elevated than as it's described in Case B, the picture looks grey, which is noticeable to most people.

I honestly fail to understand how you can't comprehend this.

Even in Case A with a starfield, I can clearly see the grey background, which does not appear black. If ANSI contrast would be so great it would improve these scenes, but it does not. If the starfield is more dense, a PJ with higher ANSI contrast would be more efficient, but these scenes regularly fall under 5% ADL or much lower.

I'd say that the poor milky dark parts of images are very prevalent, and distracting. On paper they might be less, but because they don't look good it becomes a bothersome issue. Case B is from memory much more prevalent.

A first time projector buyer recently got a W2000. Do you know what the first complaint was? It not resolution, but the elevated black floor. Grey blacks are far more of an issue in themselves, and when compared to resolution.

If you read this forum you should already know that there is a difference in low ADL scenes between projectors, and it's not subtle. Most people will notice it.

The black floor or some units with iris/dimming:
RS640 0.0007 nits
5050UB 0.0042 nits
HC3800 0.0055 nits
HC4010 0.0128 nits
HC2030 0.0435 nits
HT3550 0.0533 nits
TK850 0.0672 nits
HT3050 0.081 nits
UHD51A 0.1441 nits and 0.1308 in HDR

Previously I had a HD27 which had better blacks than the W2000 (HT3050). Many people have noticed the difference between the TK850 and HT3550. I can only imagine what a High Contrast unit could do.

Is Game of Thrones a popular show?



Many users who own high contrast units and low contrast ones (ON OFF) have commented that there is a substantial difference between the two in low ADL, and this is the general consensus.

While there is a difference is what people watch, what they are able to observe, it's safe to say that a majority will notice the poor ADL performance of some units and will also notice the difference to a model with good ADL performance. Units that can deliver good low ADL performance can be had for a good price, like the 5040UB.

Even the claim that I've seen you made several times that HDR is better with a bright DLP like a PX747 is countered by someone which I trust more than you:
https://www.avsforum.com/forum/24-d...trast-measurements-thread-5.html#post59591402
This also applies to your comment about highlights:
Any scene that has a highlight in it, is going to look very similar on just about any reasonably decent projector when compared under similar conditions. Yes some will look better than others, depending on the user's viewing preferences, but the differences are not going to be dramatic as these videos show:

But if you want to tell people that they're blind I will have to disagree.

Are there areas that 3LCD or LCOS might do better? Yes, but again, in a properly setup projector and video source, the differences are likely to be subtle and if they're not subtle then something isn't setup correctly. This is why I always look for problems in setup when people complain about IQ.
 

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I said I would not dwelve into it but I will.

In post 1737 (link) it's suggested that (low ADL) scenes with bright/white and dark/black pixels benefit from a projector with high on/off contrast, with regular content at this ADL having a smaller CR. It's an indirect implication that even projectors with low CR could handle these scenes.

However, even if the dynamic range in a low ADL scene is low, what is important in these scenes is the black floor.

Projectors with low CR don't have a low black floor, as it was noted in the post above. In fact, something like the UHD51A, and all 4K DLPs without an iris have higher black floors than the previous generation 1080p DLPs. This is a well established fact.

How do these high CR models reach a high CR value? They are not overly bright, and as it was mentioned in the last linked post, increasing the brightness usually raises the black floor as well. They do it by having low black floors.

A projector with high CR, in low ADL, even though it may not use it's entire range in most scenes, will do better because it's black floor is low.
 

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@noob00224

Now you've gone from discussing projectors to simply being insulting. I have stated time and again, that we all have our personal preferences, and we should respect that we're all individuals. There's no one size fits all solution.

I've stated and restated that I use a large, low gain grey screen. Using small, high gain screens is going to cause problems in terms of apparent black levels and contrast for many projectors. I've tested my setups with a variety of different projectors and shared the results in this forum with numerous screen shots, to illustrate the effects of different settings, and different BD players.

What projector do you actually use?
 

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@noob00224

Now you've gone from discussing projectors to simply being insulting. I have stated time and again, that we all have our personal preferences, and we should respect that we're all individuals. There's no one size fits all solution.

I've stated and restated that I use a large, low gain grey screen. Using small, high gain screens is going to cause problems in terms of apparent black levels and contrast for many projectors. I've tested my setups with a variety of different projectors and shared the results in this forum with numerous screen shots, to illustrate the effects of different settings, and different BD players.

What projector do you actually use?
I never said it's a one size fits all. The topics are discussed in general.
It's not about you and your setup. But if that is the conclusion you came to (regarding low ADL and poor CR projectors), then that goes against what has been known over many year and many experienced users. Soulnight described it in the last link, one which you liked.

My experience is one, but the general consensus on this forum is that high contrast projectors do improve quality in low ADL, including in not perfect rooms. It's not subtle and most people will notice it and be bothered by a grey areas that are supposed to be black. It happens often, and it sticking out increases the perception of the problem.

Again, the study showed under 1% ADL is 11%. Average is 8%. Game of Thrones is the most popular TV show ever, at least in terms of streaming. General content is pretty dark. Not everyone will consume the same content, notice or care about the poor blacks. But if given a choice most will probably choose a model that does better with low ADL.

Of course if someone has a setup that deviates from what is generally used, from screen size to content type, etc. , then the proper equipment must be selected.

How is what I've described with my DLP any different from what has been said in every review? It's not controversial that DLP has poor blacks. I'm not going to go into my setup as not to distract from the two topics, resolution and picture quality in low ADL with different CR projectors. There's not much for me to say.
 

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This is a nice video review of the UHD40, which appears identical to the North American UHD50. When the reviewer mentions the UHD50 he's actually referring to the EU only UHD51. Also he reviews a very well designed wall mount:

 

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Pauldustler: The only reason I want framepacked in my uhd40 is to be able to watch 3D movies in mpc-hc and madvr which doesn’t work with frame sequential. Watching movies with madvr is like day and night differences to watching it without (with powerdvd for example). Maybe you have other solution for me? Does there another way watching movies with madvr in frame sequential ?
You can watch 3d movies with stereoscopic player or the nvidia 3d player, that's how I watch them - stereoscopic player with nvidia 3d player licence update. You don't need frame packed to watch movies, frame sequential works just fine. You need the nvidia 3d vision `pyramid` though and will need the 3d hacks to enable 3d with windows 10 (for the latest build) as mentioned earlier or win 7.
 

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"Best Selling 4K UHD Home Entertainment Projectors 11/19

Projector Comments
#1 Optoma UHD50 2400 lumens, PC 3D ready, $1299 street price
#2 Optoma UHD60 Link to our First Look Review below
#3 BenQ HT3550 Link to our full review below - Hot Product Award winner
#4 BenQ TK800M Best Bright Room Home Entertainment Award Winner 2019-2020. Review link below.
#5 Viewsonic PX747-4K Link to our First Look Review below"
https://www.projectorreviews.com/th...e-Laser-Projectors-November-2019-January-2020


As we've discussed here, the UHD50 can be upgraded via firmware to be fully BD 3D ready - it's a bit of a nail biting process however.
 

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Also Immersion - how is madvr better?
As I said earlier when you compare the results of the picture quality after the rendering of madvr - you never want to watch movies without it. The picture is way more sharp and its upscaling to 4K is superb. You will need killer GPU and cpu and it’s gonna squeeze every drop of power from it.

Paul, does stereoscopic player / Nvidia player work with madvr?
 

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As I said earlier when you compare the results of the picture quality after the rendering of madvr - you never want to watch movies without it. The picture is way more sharp and its upscaling to 4K is superb. You will need killer GPU and cpu and it’s gonna squeeze every drop of power from it.

Paul, does stereoscopic player / Nvidia player work with madvr?
madvr does not necessarily require a high end gpu, it depends on what features are being used.
 

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Hi Guys, Newbie here...I own a UHD50 for less than a month and impressed with the video display from the projector. I also updated the firmware for the 3D capability to the latest one.

Below is my FW version looks like :
MCU: C04
System:C09

I had a chat with Optoma representative to ensure above firmware version supports 3D and they do confirmed the same.
Few days ago i bought few 3D bluray movies(Avatar, The Wall, Gravity and Best of 3D movies) from Amazon.com along with DLP active shutter supported 3D glasses.

3D glasses i bought from amazon.com : BOBLOV DLP Link 3D Glasses Active Shutter 144Hz Rechargeable for All DLP-Link 3D Projectors, Can't Used for TVs, Compatible with BenQ, Optoma, Dell, Acer, Viewsonic DLP Projector

Im trying to play 3d movies via my old PS4( Not ps4 slim or pro version) and im having hard time in getting/seeing 3D.

Below is my 3D configuration in the projector settings

Menu-->display-->3d-->
3d Mode = ON
3d Sync insert = ON
3d Format = Frame packing

First i tried playing Best of 3D movie disc. When selected Play 3D via ps4 the movie gets played. i tried above settings and also other 3D format combinations i'm not able to see or feel the 3D through my DLP glasses even though my DLP glasses were receiving signal.(Please note this 3D glass supports DLP technology)

Then i tried playing Avatar movie, when i select play 3d movie from PS4, im getting a message saying "This feature requires a Blu Ray 3D Player connected to 3D Display. Your Blu Ray 3D player has not detected that it is connected to a 3D display"

Can some one please throw some light on the settings i need to do in my projector. Also can someone provide me a reference to a 3D glass to buy as im thinking of getting new one if the problem is with the glass.

I searched nearby and also in internet i dont see Optoma Z302 DLP glasses been sold anywhere as everywhere its showing OOS.

Thanks
 

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Hi Guys, Newbie here...I own a UHD50 for less than a month and impressed with the video display from the projector. I also updated the firmware for the 3D capability to the latest one.

Below is my FW version looks like :
MCU: C04
System:C09

I had a chat with Optoma representative to ensure above firmware version supports 3D and they do confirmed the same.
Few days ago i bought few 3D bluray movies(Avatar, The Wall, Gravity and Best of 3D movies) from Amazon.com along with DLP active shutter supported 3D glasses.

3D glasses i bought from amazon.com : BOBLOV DLP Link 3D Glasses Active Shutter 144Hz Rechargeable for All DLP-Link 3D Projectors, Can't Used for TVs, Compatible with BenQ, Optoma, Dell, Acer, Viewsonic DLP Projector

Im trying to play 3d movies via my old PS4( Not ps4 slim or pro version) and im having hard time in getting/seeing 3D.

Below is my 3D configuration in the projector settings

Menu-->display-->3d-->
3d Mode = ON
3d Sync insert = ON
3d Format = Frame packing

First i tried playing Best of 3D movie disc. When selected Play 3D via ps4 the movie gets played. i tried above settings and also other 3D format combinations i'm not able to see or feel the 3D through my DLP glasses even though my DLP glasses were receiving signal.(Please note this 3D glass supports DLP technology)

Then i tried playing Avatar movie, when i select play 3d movie from PS4, im getting a message saying "This feature requires a Blu Ray 3D Player connected to 3D Display. Your Blu Ray 3D player has not detected that it is connected to a 3D display"

Can some one please throw some light on the settings i need to do in my projector. Also can someone provide me a reference to a 3D glass to buy as im thinking of getting new one if the problem is with the glass.

I searched nearby and also in internet i dont see Optoma Z302 DLP glasses been sold anywhere as everywhere its showing OOS.

Thanks
Hi, do you have a UHD50 or a UHD51A? I installed the latest UHD50 firmware update and it shows:

System: C07
MCU:C03

I tested my UHD50 with a Sony X700 and a Panasonic UB420 and both worked fine with my Boblov 3D glasses. I can't help with the Xbox, sorry.
 

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Hi, do you have a UHD50 or a UHD51A? I installed the latest UHD50 firmware update and it shows:

System: C07
MCU:C03

I tested my UHD50 with a Sony X700 and a Panasonic UB420 and both worked fine with my Boblov 3D glasses. I can't help with the Xbox, sorry.
@DunMunro - Thanks for your quick response. I own UHD50 not UHD51A.

I do have below FW version showing under the information of projector menu.

Attached pic for your reference.

Can you tel me which 3D glass you are using ?

Also what is the below setting under Menu-->display-->3d showing for you when you play 3D movies?

3d Mode = ?
3d Sync insert = ?
3d Format = ?
 

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@DunMunro - Thanks for your quick response. I own UHD50 not UHD51A.

I do have below FW version showing under the information of projector menu.

Attached pic for your reference.

Can you tel me which 3D glass you are using ?

Also what is the below setting under Menu-->display-->3d showing for you when you play 3D movies?

3d Mode = ?
3d Sync insert = ?
3d Format = ?
I think they're the same 3D glasses that you have:

https://www.amazon.ca/gp/product/B07BMQ36DD

Where did you download the firmware from? The Optoma UHD50 website only shows C07 firmware for download, but the UHD51A website shows a C09 available.

My UHD50 doesn't show all three items under Menu->display->3D. It shows:

3d Mode = on
3d Sync insert = off
3d Format = (not on the menu)

I'm playing the Passengers (2016) 3D BD via my Sony X700.
 

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I think they're the same 3D glasses that you have:

Where did you download the firmware from? The Optoma UHD50 website only shows C07 firmware for download, but the UHD51A website shows a C09 available.

My UHD50 doesn't show all three items under Menu->display->3D. It shows:

3d Mode = on
3d Sync insert = off
3d Format = (not on the menu)

I'm playing the Passengers (2016) 3D BD via my Sony X700.

@DunMunro - i bought this UHD50 as a refurb unit from buydig.com. By default i got the projector with MCU: C04 and System:C09 as FW version.

Do you think the firmware update messed up the 3d capabilities of the projector?
 

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@DunMunro - i bought this UHD50 as a refurb unit from buydig.com. By default i got the projector with MCU: C04 and System:C09 as FW version.

Do you think the firmware update messed up the 3d capabilities of the projector?
What colour is the projector case?

Can you test it with a BD player?
 

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What colour is the projector case?

Can you test it with a BD player?
@DunMunro - its a white case(and not Black case) and also checked in the menu --> information ..it says UHD50 only not UHD51A.

I have to try with Blu Ray player...

Im thinking, since this projector is refurb unit, the person who owned/bought this before might have done the firmware update of UHD51A for this UHD50 unit.
 
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