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INFOCUS H8606HD New DLP Full hd 3D Ready ISFccc - Page 3

post #61 of 125
Got two questions for you, what about fan noise and shelf placement. will it work thanks. I forgot to ask do you see RBE.
Edited by jsil - 11/24/13 at 8:42am
post #62 of 125
Fan noise is pretty low. I turned down the sound on my movie and can hear the fan when I can't make out the dialogue in the movie. I would say at normal sound levels in viewing the fan is very low. When there is no sound in the movie, I hear the fan but it is a lower frequency hum.

I have seen RBE in the HC1500 Mit but nothing since. I try to see RBE by turning my eyes side to side fast and cannot pick RBE in the IN8606HD. I was not very sensitive to RBE however.

The IN8606 has a longer throw like the PJ's of the early 2000's. I set up a ceiling outlet and mount at 18 feet 6 inches so I was having to use horizontal pipe to mount the HD66. I don't think one needs to spend more than $1000 to get a very good image these days.

Shelf placement may work. The air vents are front and left of lens when setup table top or shelf. No issue with anything right behind the PJ like a wall. The shelf may have to be 12" for the feet to rest on the shelf because of the power cord and HDMI going out the back.
post #63 of 125
Could you take some pictures of the image at all ? smile.gif
post #64 of 125
Thanks kevivoe for the reply. I'm looking at a throw of 16' to 110" screen.
post #65 of 125
On sale at Besy Buy for $799.99.
post #66 of 125
@ kevivoe

did you get to activate ISf day/night?

I just sold mine for $1100,and the guy who bought the projector keep's asking me that,I checked the online manual which say's that the isf technician will do that,is there any workaround ?
thanks
sorry guys,the guy was at my house when the projector was delivered,and he asked me wither I'M willing to sell for $100 more,I said why not?
so I had about 10-15 minutes to check it out,it looked really good.
Edited by 3dprojector - 11/29/13 at 10:40am
post #67 of 125
Hello everyone,

Just so this thread doesn't get bogged down with rumors and other hear say trivia here are some real world numbers and facts regarding the InFocus IN8606HD. This projector may not be the choice for someone with a fully tricked out, high end, bat cave home theatre but for most people just wanting big screen entertainment at a more affordable cost than a large flat panel this is a viable candidate.

In today’s projector world there are a handful of huge, mostly Taiwanese companies who manufacture their products in mainland China and whose projector business is but a small segment of their product portfolios. To maximize the ROI of their engineering costs they design projectors with the idea of creating a base platform then leveraging it into multiple models for multiple applications and brand names, including InFocus. Some previous poster already pointed out IN8606HD looks identical to a certain Vivitek model only with a black enclosure. Some astute observer once said, “The devil is in the details.” so for those more technically savvy here are the details from InFocus IN8606HD product engineer, me. By the end of this post I hope you will see that because InFocus does not simply accept without question what the Chinese factories produce, IN8606HD is not just a Vivitek in a black case.

IN8606HD is a home entertainment projector with emphasis placed on achieving Rec 709 color specifications and providing the user with connections and color management controls needed for ISFccc endorsement, and enjoy a good home entertainment experience. Because of the IN8606HD’s base platform's multiple configuration capability IN8606HD shares some components with a business enhanced version expected to be released in the near future.

IN8606HD employs a 0.65 inch DC3 1920x1080 pixel DMD imager driven with a DDP4422 processor. Illumination source is a 240W UHP Osram lamp supporting eco lamp dimming technology. In BRIGHT projection mode light output averages about 2500 lumens. Full on/full off contrast ratio is a little over 6800:1 with eco lamp dimming but its true native contrast ratio is more like 1725:1. No DLP projector with a DC3 or less DMD measured by honest, no marketing spin yields anywhere near the ridiculous contrast ratios often published. ANSI contrast is about 123:1. When a black image is displayed eco lamp dimming causes the lamp to reduce power to 30% of maximum. If white is measured at full lamp power and black is measured at 30% lamp power you can see how the contrast ratio can easily be overstated from real world conditions. If the user chooses low or eco lamp power output will be reduced to 80% of maximum of full power.

The colorwheel’s six segments are 0.7mm thick and arranged in this sequence and size starting with the timing index mark placed 60° from the red/yellow boundary or "spoke" as it is referred to in DLP terminology: Red 102°, green 84°, blue 76°, cyan 36°, magenta 24° and yellow 38°. The colorwheel spins at 7200rpm which corresponds to two color cycles per video frame at 60Hz. In other words 2X.

BRIGHT (sometimes called NATIVE) mode in any projector illuminated with a UHP lamp always has too much green and yellow because it is in that spectra where light output is the greatest. IN8606HD is not unusual in this regard. Its native white point y coordinate is 0.355 meaning a coordinated color temperature well below the 6500K Rec 709 standard. It must be no greater than 0.329. BRIGHT projection mode is nice for getting the extra lumens if you really need it or giving marketing people something to crow about but I am more concerned of what happens in MOVIE projection mode; the mode I suspect most readers of this forum would use.

MOVIE mode uses the red, green and blue colorwheel segments only meaning color lumens will be 100% of full on white lumens when measured in MOVIE mode. Brilliant Color is off. The sum of red, green and blue segments is 214° equating to 60% colorwheel usage and that means there is no light output during 40% per colorwheel revolution. That 2500 lumens of BRIGHT mode is now about 1500 lumens and the white point is still far from the standard x 0.3127 and y 0.329. Adjusting RGB gain and offset will get to Rec709 white point but will sacrifice more lumens in the process. And even more lumens will be lost calibrating hue, saturation and gain of primary and secondary colors to Rec709. Fully calibrated IN8606HD will yield almost 700 lens lumens. Even at that IN8606HD green hue still doesn’t come as close to Rec709 as neither I or Joel Silver from ISF would like. But remember IN8606HD’s base platform can be configured for business use where lumens are more valuable than accurate color hence the green hue compromise. In all honesty though I doubt most users will notice the error. If we absolutely insisted on a colorwheel designed for an accurate green point (i.e., RGBRGB) like we did for the older IN8602 for which I was also product engineer, it could not be sold at the attractive price at which it is being offered since its base platform appeal to business customers would be negatively impacted.

After calibrating our reference IN8606HD with Chromapure I made the resulting settings for Brightness, Contrast, Sharpness, Gamma, White Balance and Color Management the factory defaults for MOVIE projection mode. By doing so I believe the customer will enjoy the best out-of-box blu-ray movie viewing experience during the initial hours of operation. This is not the equivalent of an ISF calibration. For continued long term enjoyment after 100 hours or so of operation an on-site ISF certified calibration is the best way to go. ISF Day/Night modes do not appear in the menu structure and are completely inert until activated by an ISF certified calibrator. I'll look in on this thread from time to time and try to answer questions as best I can.

Best regards,
Dennis
post #68 of 125
Thanks for all the info Dennis. BUT a 2X color wheel speed is a deal breaker for a lot of people.
Edited by Jim McC - 12/1/13 at 6:19pm
post #69 of 125
Indeed IN8606HD colorwheel speed is 2X but when I made that statement I said it applied to a 1080p60 input. It also applies to 1080i30. However at the slower blu-ray movie 24 fps rate colorwheel speed is 4X with 2D material and 6X for 3D. And that brings up another point. You must use 3D glasses compatible with 144HZ left eye right eye switching. I agree if your main interest is gaming and your game box or PC is set for 60fps and you are sensitive to RBE 2X might be problematic for you.

Dennis
post #70 of 125
Dennis,

Really appreciate your input into this thread. I am very interested in this projector as a replacement for my HD65, which to my eyes is pretty ropey with black levels and contrast when set for maximum black levels (does anyone know the native contrast/ansi for it as a comparison?)

I have 2 questions ..

1) is the H8606HD a worthwhile upgrade on the HD65 for black levels/contrast ? ( i am not a rich man so cost effective quality upgrade is a main factor).

2) Dennis, you mention that a qualified ISF calibration is the way to go, but is there enough scope in the PJ for someone to get a really nice result themselves using a calibration DVD?

Many thanks for any help in advance.

Dan.
Edited by DanHorse - 12/12/13 at 6:37am
post #71 of 125
Thread has gone quiet.. i am surprised there isn't more interest in this when i think of Infocus's track record of getting the most out of a projector at any particular price point..

I wonder how this one performs in comparison to the BenQW1070 and Optoma HD131xe/25.
post #72 of 125
Quote:
Originally Posted by DanHorse View Post

Thread has gone quiet.. i am surprised there isn't more interest in this when i think of Infocus's track record of getting the most out of a projector at any particular price point..

I wonder how this one performs in comparison to the BenQW1070 and Optoma HD131xe/25.
I think it died once the color wheel speed was revealed.
post #73 of 125
Quote:
Originally Posted by sodaboy581 View Post

I think it died once the color wheel speed was revealed.

Yep. That's why it's priced so low.
post #74 of 125
Quote:
Originally Posted by sodaboy581 View Post

I think it died once the color wheel speed was revealed.

Wasn't that because they thought it was 2x for normal bluray 24fps? That's now been put right at 4x so it should have some legs again. maybe its the 3D wheel speed putting the skids on - shame, i have no interest in 3D, sometimes i wish the forums where split into 2D and 3D discussions, be a shame if this lost out if its a great 2D machine. This machine could be a real viable alternative to the Hd25 or W1070. No im not affiliated in any way, just know the pedigree of Infocus, and would love to get some info on comparisons against the aforementioned PJs or any others.
post #75 of 125
I personally think RBE gets overblown around here at AVS. Yes some people can see rainbows, but I have owned a variety of DLP TV's and projectors and my wife and I have never seen a rainbow. I have a number of family members and friends who have watched countless movies and TV shows with us on our DLP projectors and have yet to see a single person mention it.

Just because something has a 2x or 4x speed color wheel does not make it immediately unwatchable. In fact the vast majority would most likely never know the difference nor care. For those that are sensitive the W1070 is $799-899 street and is reported as having a 6x color wheel.
post #76 of 125
It's not overblown when it affects you. I tried 2 projectors with a 2x color wheel speed, and 3 out of the 5 of us saw rainbows on them both. After we switched to a 4x color wheel, no rainbows. The fact that they're still making projectors with a 2x color wheel speed is ridiculous.
post #77 of 125
I bought one of these a couple of weeks ago and I had to return it. The RBE was terrible. I've had 2 dlp projectors prior to this one, an IN72 and an X10, and I've never seen a rainbow before.

The 3d was great on this, I didn't see any rainbows. However everything else non 3d had RBE like crazy. Cable, blu-ray, xbox/playstation, even using the menu with no signal fed to it. I also got major eye fatigue watching the projector in 2d. I hooked my X10 back up just to make sure it wasn't something with my source or my eyes or whatever. Like I said I've never experienced this issue before. I just unplugged the cable going to the 8606 and put it in to X10 and no more rainbows.

I've been completely satisfied with my previous infocus products. It saddens me that I've got to try a different brand now, but this projector just won't work for me.
post #78 of 125
2x color wheel speed is the easy way to the get brightness, hence the reason business/presentation projectors are 2x wheel speed. RBE isn't really an issue in that application as they are usually being used in a room with some lights on.

But in a dark HT environment it's asking for trouble.
post #79 of 125
DanHorse,

IN8606HD black level is not what I would call spectacular in absolute terms but is typical of lower cost single chip DLP projectors. It might even be about the same as the projector you were comparing it to because of IN8606HD's brighter 240W lamp. On the other hand because of the brighter lamp the maximum white level is higher and that results in a higher native contrast ratio.

For sure best results will be realized by having an ISF calibration done but the ISF calibrator won't have any more controls or adjustments at his/her disposal than you would. What the calibrator will have is some instruments and software that will yield better, more accurate settings than you could ever do by yourself and then the means to lock those settings preventing them from accidentally being changed. If you want to try yourself simply choose the USER projection mode and tweak to your heart's content. You can't do any harm.

Best regards,
Dennis
post #80 of 125
I had hoped that after this many years of evolving DLP technology more AVS forum people would have a better understanding of how it works. From some of the recent comments on this thread I see that is not the case. It was probably a mistake that I revealed some IN8606HD colorwheel details such as its spin factor. Many if not most of the DLP projectors discussed in this forum use the same basic 2X colorwheel design but their marketing literature doesn't disclose that because it would bring up all the RBE horror stories whether real or imagined. A 2X colorwheel is not the cheap way to make a projector brighter and really doesn't make a projector any brighter. If you want brighter use a higher wattage lamp, a larger DMD imager, a faster lens, and then kiss your sub $1000 projector goodbye.

For those who want the best color fidelity look for a projector with a six segment colorwheel using only red, green and blue segments. Are there any sub $1000 projectors like this on the market? I am not a marketing guy so I really don't know but I doubt it. Such a projector's colorwheel would have two segments each of red, green and blue and be sure the big yellow spike in the lamp output is filtered out otherwise red and green won't hit Rec 709. This colorwheel would make two revolutions for each frame of video. At 60 fps you would have a 4X colorwheel and no discernible RBE for all but the most sensitive observers. You also would not have a whole lot of lumens; certainly not enough for 3D.

Now we start making compromises to stay below $1000 MSRP and still have an image acceptable to most people. More lumens would be desirable so lets reduce the red, green and blue segment sizes to make room to add a clear segment. Yes, lumens are up but color saturation is reduced by the introduction of unfiltered light. That's a compromise. There are a lot of lumens in that yellow spike we previously filtered out so lets add some of it back in. Again, more lumens but red is not as red and green is not as green as it used to be and to make matters worse what should be yellow will look more like a dirty brown. Another compromise. OK, maybe we can fix that by adding a yellow segment to the colorwheel. But to make room for it red, green and blue segments must give up a little more. We can do the same thing again for cyan and magenta and each time we give up a little more of red, green, and blue. One good thing though is that being a entertainment projector we can eliminate the clear segment which will cost some lumens but allow the remaining RGBCYM segments to be larger.

Now we run into a big problem. Even with eliminating the clear segment the addition of cyan, yellow and magenta segments means it is no longer possible to have multiple segments of each color. If we did their sizes would be so small each one could not be in the illumination path long enough time to load all the data into the DMD imager. Those little microscopic mirrors are fast but not that fast especially when you have a 1920X1080 pixel array. Too many pixels, not enough time. This is why there is only one colorwheel segment for each color and that means the best we can do is spin the colorwheel twice for each frame of 60 fps video and hence, 2X.

So I ask you to be fair and don't criticize IN8606HD for having a 2X colorwheel (for 2D 60fps video only) when every other manufacturer of single chip DLP projectors faces the same issues and makes the same compromises with the only exception being a projector with a true six segment RGBRGB colorwheel.

Best regards,
Dennis
post #81 of 125
Actually, there are two sub $1000 DLP projectors that have RGBRGB color wheels. The BenQ W1070 and the Mitsubishi HC7900DW. Mits is only cheap now at $899 since Mits pulled out of the Projection game.
post #82 of 125

Hi Dennis (and everybody else).

 

I would have a different type of question. I have owned a home cinema projector before (it sadly died on me) and got used to its quietness.

 

I think 29 dB in ECO mode will still be too loud for my taste as the projector is mounted just directly above my head (and under the ceiling) in the room.

 

I know that messing with the projector's fan would void any warranty but I still need to know - is it possible to change the fan with a more silent one or drop its rpm (with a resistor)? Will this affect PJs cooling performance much (how many CFMs are required so it does not overheat in ECO mode)?

 

Or what would you do if noise was the most important thing? I plan to run the projector in ECO mode the whole time, still its 80% lamp light output is considered too high (could do with less easily).

 

Can these "issues" be addressed by myself or should I just look elsewhere?

 

I have spent 3000 USD on projector before, this time round I would like not to do so if I can get decent results with this model ...

post #83 of 125
Quote:
Originally Posted by tibia View Post

I had hoped that after this many years of evolving DLP technology more AVS forum people would have a better understanding of how it works. From some of the recent comments on this thread I see that is not the case. It was probably a mistake that I revealed some IN8606HD colorwheel details such as its spin factor. Many if not most of the DLP projectors discussed in this forum use the same basic 2X colorwheel design but their marketing literature doesn't disclose that because it would bring up all the RBE horror stories whether real or imagined. A 2X colorwheel is not the cheap way to make a projector brighter and really doesn't make a projector any brighter. If you want brighter use a higher wattage lamp, a larger DMD imager, a faster lens, and then kiss your sub $1000 projector goodbye.

For those who want the best color fidelity look for a projector with a six segment colorwheel using only red, green and blue segments. Are there any sub $1000 projectors like this on the market? I am not a marketing guy so I really don't know but I doubt it. Such a projector's colorwheel would have two segments each of red, green and blue and be sure the big yellow spike in the lamp output is filtered out otherwise red and green won't hit Rec 709. This colorwheel would make two revolutions for each frame of video. At 60 fps you would have a 4X colorwheel and no discernible RBE for all but the most sensitive observers. You also would not have a whole lot of lumens; certainly not enough for 3D.

Now we start making compromises to stay below $1000 MSRP and still have an image acceptable to most people. More lumens would be desirable so lets reduce the red, green and blue segment sizes to make room to add a clear segment. Yes, lumens are up but color saturation is reduced by the introduction of unfiltered light. That's a compromise. There are a lot of lumens in that yellow spike we previously filtered out so lets add some of it back in. Again, more lumens but red is not as red and green is not as green as it used to be and to make matters worse what should be yellow will look more like a dirty brown. Another compromise. OK, maybe we can fix that by adding a yellow segment to the colorwheel. But to make room for it red, green and blue segments must give up a little more. We can do the same thing again for cyan and magenta and each time we give up a little more of red, green, and blue. One good thing though is that being a entertainment projector we can eliminate the clear segment which will cost some lumens but allow the remaining RGBCYM segments to be larger.

Now we run into a big problem. Even with eliminating the clear segment the addition of cyan, yellow and magenta segments means it is no longer possible to have multiple segments of each color. If we did their sizes would be so small each one could not be in the illumination path long enough time to load all the data into the DMD imager. Those little microscopic mirrors are fast but not that fast especially when you have a 1920X1080 pixel array. Too many pixels, not enough time. This is why there is only one colorwheel segment for each color and that means the best we can do is spin the colorwheel twice for each frame of 60 fps video and hence, 2X.

So I ask you to be fair and don't criticize IN8606HD for having a 2X colorwheel (for 2D 60fps video only) when every other manufacturer of single chip DLP projectors faces the same issues and makes the same compromises with the only exception being a projector with a true six segment RGBRGB colorwheel.

Best regards,
Dennis

Dennis,

Thanks for that in depth reply there to previous comments. I for one very much appreciate learning more, i do not have time to stay on forums much so cannot always take in what info there may be scattered around - so technical explanations like this really help me understand the tech more. you definitely should post what you have!

I mean, as far as i understand, bluray is 24fps in 2D, so a PJ running at 4x is fine for me. So the 60fps in 2D is not making sense to me... guys here are more knowledgeable than i so i will defer there. But i think the issue is 3D spin rate for some. I do wish 3D discussion had its own forum, so many of us are not interested in it and to see products getting derailed on threads because of 3D concerns is galling. TBH so many threads are getting bogged down in what 3D glasses to use.... how things change....
post #84 of 125
Quote:
Originally Posted by DanHorse View Post


I mean, as far as i understand, bluray is 24fps in 2D, so a PJ running at 4x is fine for me. So the 60fps in 2D is not making sense to me... guys here are more knowledgeable than i so i will defer there. ..

Speaking for 2D, 24fps is actually doubled to 48hz refresh rate before being projected. So 60HZ refresh rate is not that much higher of a refresh rate. Either way, if the PJ is a 4x wheel, it will still be 4x at 24fps or 60hz.
And usually a blu ray player will output 60hz with blu rays. To get it to play at 24fps (48HZ), you will usually have to change the default setting in your player.

I can't speak for 3D.
Edited by fleaman - 12/28/13 at 11:23am
post #85 of 125
Quote:
Originally Posted by tibia View Post

So I ask you to be fair and don't criticize IN8606HD for having a 2X colorwheel (for 2D 60fps video only) when every other manufacturer of single chip DLP projectors faces the same issues and makes the same compromises with the only exception being a projector with a true six segment RGBRGB colorwheel.

Best regards,
Dennis

Most all HT projectors are 6 segment RGBRGB for an effective rate of 4x wheel speed.

Most 2x wheel speed projectors tend to be presentation/business projectors, and yes, they are usually not RGBRGB, but tend to have a segment setup that enhances brightness. But being 2x wheel/refresh, they're a bad choice for dark room home theater work (RBE), not to mention the usual high black level and low contrast performance that tends to be the norm.
post #86 of 125
Quote:
Originally Posted by fleaman View Post

Most all HT projectors are 6 segment RGBRGB for an effective rate of 4x wheel speed.

I am not disputing what you say about HT projectors. I would be the first to agree with you and acknowledged in my first post that IN8606HD may not be the choice of those who have a light controlled environment fully dedicated to HT activities. We knew that from the get go. That is why we are making a distinction and marketing IN8606HD as a home entertainment product, and, by the way, it is selling quite well in both the US and Europe.

Best regards,
Dennis
post #87 of 125
You mentioned that CW speed with 24fps blu ray is 4X, but 2X at 1080p60 input>>
Quote:
Originally Posted by tibia View Post

Indeed IN8606HD colorwheel speed is 2X but when I made that statement I said it applied to a 1080p60 input. It also applies to 1080i30. However at the slower blu-ray movie 24 fps rate colorwheel speed is 4X with 2D material and 6X for 3D.

Dennis

That doesn't make sense to me.

With the 1080p60 input (blu player output), the PJ should project 60hz at 2D (or is it 120hz? I can't remember)

With the player set to 24fps the projector should project 48hz, so a slightly slower wheel speed in theory, at least with a normal HT PJ with RGBRGB segments (2D).

Can you elaborate how the 8606 is achieving a double refresh rate at the 24fps player setting?

Perhaps I'm forgetting what happens at 60hz. I can't remember if DLP doubles that to 120hz to project. I thought with my Mits HC3800 the CW slows down slightly to 48hz on the 24fps player setting.
post #88 of 125
dvorjan,

projector fan and blower speeds are determined by thermal tolerances of critical components the two most important being the lamp, DMD and their power supplies. Some components such as the DMD have temperature sensors mounted on their respective circuit boards. In fact blowers usually have a tach output where system firmware can monitor rpm. If you were to put a resistor in series with a fan it would indeed run slower and quieter but temperatures would rise. The system firmware would sense that and increase supply voltage to that particular fan to compensate. So you really haven't gained anything. Rather you will have lost some valuable cooling headroom that might be needed in a higher ambient temperature or altitude environment.

fleaman,

I referenced my comments about colorwheel spin factors to original source material. In that reference I can say 24fps film sources result in a 3X spin factor. But you are right that 24fps source material is doubled to 48fps. By that definition both 48fps and 60fps result in a 2X spin factor in IN8606HD. Film projectors accomplish the same thing by flashing each frame of film twice. You are also correct about there being a difference in colorwheel speed in relation to refresh rate. DLP colorwheels frame lock and therefore change speed, to any frame rate between 48 and 52 fps and between 58 and 62 fps. The two speed ranges come about to address the 60Hz frame rate of American TV and the 50Hz frame rate of European and some other countries.

Best regards,
Dennis
post #89 of 125

A few points from a newbie owner (previously owned an Infocus X10) :

- Why has no-one mentioned the massive throw ratio range of this projector 1.39 to 2.09, Its pretty unique in budget models, and the real reason I bought it (I have a big room)

- Rainbow effect, I see it sometimes on high contract areas like subtitles and status messages, its present on this projector but difficult for me to see it and not to a degree that bothers me, plus everyone else who has seen the projector says to me "rainbows what rainbows", but sure they affect some people and if you're affected don't buy a single chip DLP. I also saw them on my old X10.

- Fan noise, its excellent for me, so long as Eco mode is enabled ... do not use "Normal" mode, unless you are deaf or hard of hearing.

- You MUST tweak the picture settings to your tastes, defaults are a disaster, once tweaked it out shines my TV and has almost (but yes, not quite) the detail in the dark scenes, that the TV has. TV is a Panasonic Viera. I used brightness 53, contract 70, bright colour 9, individual colour saturations 60 ... but each to his own.

- 3D fine, frame seqential, frame packed, side by side, above and below all present, tested blu-ray , satellite and PS3, I don't expect to use much so bought budget SainSonic ones, they seem fine with this unit.

- There is some light escaping through the grills, although not like the photo further up this thread, not enough to cause me a problem.

 

To summarise - stands out from the budget crowd on its massive throw range, this is the killer feature, and one that I needed !


Edited by swedish cook - 1/13/14 at 11:33pm
post #90 of 125

Hi Denis

 

I have just recently bought 8606 and i was wandering if you can explain something that i have noticed while projecting.

Firs time it was two white round shadows size of the coin, projector was in focus and screen was black, once i have turned it out of focus it looked like piece of hair.

This was not visible while watching movie or tv only once screen was totally black.

I have contacted shop and they have exchanged unit saying that it was probably dust and it was unlucky as it was my first projector.

They will send unit back to infocus for further investigation.

New unit however has more tiny white spots visible on the black screen only when out of the focus and more annoyingly kind of dirt mark once the screen is completely white.

Please let me know what is the reason for this and is it avoidable.

 

Thanks

 

 

Martin

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