BenQ W1070 : DLP Full HD, 3D Ready with lens-shift for 1000$ - Page 398 - AVS Forum | Home Theater Discussions And Reviews
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post #11911 of 12131 Old 01-22-2017, 09:40 AM
 
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Originally Posted by teddy0890 View Post
Hello! I have the w1070 and I'm thinking of using w1070 to project on a 175" inch white screen. Is it any good? I'm worried that the brightness wouldn't be enough with a normal white screen.
Definitely not. You need something with 3000-4000 lumens minimum for that. Or a super high gain screen which is expensive and has other problems usually (hotspotting? I don't know, I just keep hearing people complain about that). And don't forget, because of the lamp, after about 3000 hours the brightness starts to drop significantly. There's a chart somewhere of how fast it decays. How fast it dims over time increases the more hours you have, until the bulb pops.
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post #11912 of 12131 Old 01-22-2017, 02:20 PM
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Originally Posted by teddy0890 View Post
Hello! I have the w1070 and I'm thinking of using w1070 to project on a 175" inch white screen. Is it any good? I'm worried that the brightness wouldn't be enough with a normal white screen.
If you already have a W1070, use it to project a 175" image on a plain white painted wall, which will approximate a 1.0 gain white screen. See with your own eyes how bright the image is and whether or not it satisfies you.
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post #11913 of 12131 Old 01-23-2017, 02:36 AM
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Originally Posted by RLBURNSIDE View Post
Definitely not. You need something with 3000-4000 lumens minimum for that. Or a super high gain screen which is expensive and has other problems usually (hotspotting?
Why would you say that ? A 175" image is 91sf. At 16 foot lamberts you need 1450 lumens. A new lamp in a W1070 produces more than that according to ProjectorReviews (although ProjectorCentral measured much lower lumens). White screens in 1.1 or 1.3 gain are common and makes it even more acceptable. Of course that is in a perfect room with all dark surfaces and no ambient light, but your categorical "definitely not" seems a bit hasty. I am watching mine with a cheap knockoff lamp that produces less than 700 lumens and it is enough in a dark room for my 122" (45sf) screen.
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post #11914 of 12131 Old 01-23-2017, 05:51 AM
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Quote:
Originally Posted by teddy0890 View Post
Hello! I have the w1070 and I'm thinking of using w1070 to project on a 175" inch white screen. Is it any good? I'm worried that the brightness wouldn't be enough with a normal white screen.


AVIntegrated runs his W1070 on a 161" screen quite happily with only a little bit of gain (1.3).

I do think 175" is pushing it a bit (especially if you want sufficiently bright 3D), but this will vary depending on personal taste.


Full thread is here:
https://www.avsforum.com/forum/68-dig...l#post28195074

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post #11915 of 12131 Old 01-23-2017, 06:09 AM
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Originally Posted by Dave in Green View Post
If you already have a W1070, use it to project a 175" image on a plain white painted wall, which will approximate a 1.0 gain white screen. See with your own eyes how bright the image is and whether or not it satisfies you.


Yes: This is exactly what I'd do.

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post #11916 of 12131 Old 01-23-2017, 08:15 AM
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Quote:
Originally Posted by teddy0890 View Post
Hello! I have the w1070 and I'm thinking of using w1070 to project on a 175" inch white screen. Is it any good? I'm worried that the brightness wouldn't be enough with a normal white screen.
https://www.avsforum.com/forum/68-dig...61-screen.html

Yes, I think you would be okay there. You may want to try it on your wall before you go that large to ensure you are happy with the results. It's also 'very' large by most standards, so unless you are sitting at the proper distance, and have a wall that is appropriate, you may find that it just doesn't work in your setup.

This would be best in a properly setup room.
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post #11917 of 12131 Old 01-23-2017, 10:17 AM
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I think it would be marginal on a 1.0 gain white screen at 175", but it will certainly be a case of personal preference where some can live with dimmer images than others.

It's important to factor in that AV_Integrated's 161" screen is 1.3 gain, which adds ~30% brightness over more common 1.0 gain white screens. The difference between 161" (77 square feet) and 175" (91 square feet) is also going to produce ~15% difference. So a 1.0 gain 175" white screen could produce a >40% dimmer image than a 1.3 gain 161" white screen.

It should also be noted that when AccuCal performed instrumented measurement of screens they found that the less expensive white screens rated at 1.3 and 1.4 gain actually tested closer to 1.0. To be assured of getting a full advertised 1.3 gain may require moving up to a more expensive premium screen.

Another factor to consider is that at some point a really large image is going to require full lamp power to produce satisfactory brightness, which will result in more fan noise and more frequent lamp replacements. So it would certainly make sense to experiment with a number of different image sizes and find your own sweet spot before ordering a screen.
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post #11918 of 12131 Old 01-23-2017, 08:19 PM
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Quote:
Originally Posted by kreeturez View Post
AVIntegrated runs his W1070 on a 161" screen quite happily with only a little bit of gain (1.3).

I do think 175" is pushing it a bit (especially if you want sufficiently bright 3D), but this will vary depending on personal taste.


Full thread is here:
https://www.avsforum.com/forum/68-dig...l#post28195074
I mostly would just watch 2D movie. So it just need to be suffient for 2D content. I'm currently using a 100" screen and I barely watch 3D movie.
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post #11919 of 12131 Old 01-23-2017, 08:31 PM
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Originally Posted by AV_Integrated View Post
https://www.avsforum.com/forum/68-dig...61-screen.html

Yes, I think you would be okay there. You may want to try it on your wall before you go that large to ensure you are happy with the results. It's also 'very' large by most standards, so unless you are sitting at the proper distance, and have a wall that is appropriate, you may find that it just doesn't work in your setup.

This would be best in a properly setup room.
The size of the room that I'm gonna set up the new screen would be around 4m x 6m (meter) and there is no ambient light. Do you think it's good enough? Actually, I think 170" screen would be ok too but I just want to make it as big as it could be. So, the screen can be 170" or 175".
Also, I'm thinking of a few choices for the screen now:
- The Carl blackout cloth (White with gain 1.0)
- Some projector screen paint (No idea which one yet. Any suggestion for high gain paint?)
- The standard white screen (Around $800, gain around 1.0)
- The white screen with high gain 1.4 (Around $1100)
The two latter ones is available in some stores in my country. But they are too expensive.

Last edited by teddy0890; 01-23-2017 at 11:59 PM.
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post #11920 of 12131 Old 01-24-2017, 09:43 AM
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Originally Posted by teddy0890 View Post
The size of the room that I'm gonna set up the new screen would be around 4m x 6m (meter) and there is no ambient light. Do you think it's good enough? Actually, I think 170" screen would be ok too but I just want to make it as big as it could be. So, the screen can be 170" or 175".
Also, I'm thinking of a few choices for the screen now:
- The Carl blackout cloth (White with gain 1.0)
- Some projector screen paint (No idea which one yet. Any suggestion for high gain paint?)
- The standard white screen (Around $800, gain around 1.0)
- The white screen with high gain 1.4 (Around $1100)
The two latter ones is available in some stores in my country. But they are too expensive.
There really aren't 'better' projectors for the price point, so what size you are able to achieve is really going to depend on your space.

You also need to realize that if you are sitting too close to a large screen it's not a great experience. Generally you can get away with about 10" to 12" of diagonal for each foot of viewing distance. Some like more, some like less, but about 10" is really a good spot for many.

I would STRONLY suggest you get the projector first, then figure out a screen size. Just project it on your wall, watch a few movies, and figure out what you like. I've done screens that I personally found to be far too large, but the homeowner loved it. I've also seen many which I consider far too small.

But, you will need speakers and room for speakers. Video is HALF of the movie experience. Good sound matters a great deal, so filling your 4m wide wall with a screen, then having cruddy speakers isn't going to provide a great experience. It's a package deal. You also want the deep black border around the screen of several inches, and the room can't just be white with no lights on, it needs to be properly painted in dark colors for walls, ceiling, and dark carpet. I mean, I like my setup at my home on the 161" screen, but it's an unfinished space, and it's not at all the quality that I will get once I finish the basement and the entertainment space.

But, if I were you, I'd try different sizes first, THEN worry about the screen.

I don't have painted screen solutions, you would want to check the screens sub-forum for that information.
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post #11921 of 12131 Old 01-26-2017, 09:38 AM
 
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The only thing that's "wrong" with the w1070 is that it's noisy, and apparently more recent versions are much quieter. Also, using 5X colour wheel speed at 60hz instead of 6X.
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post #11922 of 12131 Old 01-26-2017, 10:08 AM
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I run my 1070 on a 148" home made screen in my man cave. The thing is awesome!

It can get washed out if the can lights are on, but it is still watchable. With the lights off it is excellent at that size. I built my screen using Carl's Place grey fabric and black edge tape. They grey helps with the light a bit and I don't use the projector for 3D so it's good for me.
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post #11923 of 12131 Old 01-26-2017, 04:17 PM
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What's the current conventional wisdom on replacement bulbs for the W1070? There seem to be a huge range of bulbs offered at a huge range of prices. I'm curious for recommendations both on what bulb to purchase and where to purchase it.

My W1070 is going strong, and has less than a thousand hours on the bulb, but it's also a few years old, so I wouldn't be surprised if I have to replace the bulb in the not too distant future. Only quibble with the projector is the dreaded fan bearing rattle, am living with it for now, and down the road undecided about whether to attempt the surgery to replace it myself or send it back to Benq (who would presumably put in a new, but not higher-quality, bearing).

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post #11924 of 12131 Old 01-26-2017, 05:39 PM
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What's the current conventional wisdom on replacement bulbs for the W1070? There seem to be a huge range of bulbs offered at a huge range of prices. I'm curious for recommendations both on what bulb to purchase and where to purchase it.
There is one conventional wisdom on lamps: Buy from the manufacturer. Right from their website.

They offer minimal discounts to 3rd party sellers who tend to have very close pricing, and anything cheap is often just that... cheap.

There is no world which currently exists where I wouldn't just go here and drop the $245.

https://www.benqdirect.com/accessori...0-w1080st.html

(edit: fixed typo!)

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Last edited by AV_Integrated; 02-15-2017 at 03:37 PM. Reason: Fixed Typo
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post #11925 of 12131 Old 01-26-2017, 08:07 PM
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I can't tell any difference from the original bulb and the 43 dollar (cheap) replacement. Same brightness, same quality. So far I've got over 1300 hours on it too. But you should buy whatever makes you feel comfortable.

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post #11926 of 12131 Old 01-30-2017, 07:02 AM
 
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I can't tell any difference from the original bulb and the 43 dollar (cheap) replacement. Same brightness, same quality. So far I've got over 1300 hours on it too. But you should buy whatever makes you feel comfortable.
Ya I got the exact same lifespan and original + decayed brightness over time in my replacement 80 dollar bulb as I did on my original, 5500+ hours. My second one is due to blow any time now.

Can you tell me the exact seller you found for yours? I'll order it right away.
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post #11927 of 12131 Old 01-30-2017, 07:31 AM
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Ya I got the exact same lifespan and original + decayed brightness over time in my replacement 80 dollar bulb as I did on my original, 5500+ hours. My second one is due to blow any time now.

Can you tell me the exact seller you found for yours? I'll order it right away.
This one. It's 54.00 now. I kept the original housing from original bulb just in case I need it at some point, but so far I haven't had any trouble with the housing on this one or the bulb. The reviews are pretty harsh but I took a chance on it. I'll post a review on Amazon once the bulb goes.

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post #11928 of 12131 Old 01-30-2017, 08:08 AM
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Hi tomtastic,

How long have you had the replacement for?

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post #11929 of 12131 Old 01-30-2017, 12:26 PM
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I've been using it since August, counter shows 1373 hours now, my original bulb lasted about 3600. Looks like they have a 30 day return and 180 day warranty.

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post #11930 of 12131 Old 01-30-2017, 03:43 PM
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The only thing that's "wrong" with the w1070 is that it's noisy, and apparently more recent versions are much quieter. Also, using 5X colour wheel speed at 60hz instead of 6X.
I thought that was with 24Hz only.

I thought they were all 4X with 60Hz material, even the HT2050.
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post #11931 of 12131 Old 02-09-2017, 08:34 PM
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Originally Posted by teddy0890 View Post
Hello! I have the w1070 and I'm thinking of using w1070 to project on a 175" inch white screen. Is it any good? I'm worried that the brightness wouldn't be enough with a normal white screen.
I'm a bit late in your question but I have the 86x153 inch which is 175 inch diagonal 1.1 gain flexiwhite from Carl. Minus 2 inches off of each edge which gives me a useable 172 inch projected image for the W1070 is, imo, fine even with a 3D movie.

Edit: Forgot to mention my room is well controlled for light. Image does get washed out a bit even with just one table lamp on. I much prefer to be sitting in total darkness (other than the projector screen image brightness) while watching a movie anyway to get that being in a real theater feel.
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post #11932 of 12131 Old 02-12-2017, 05:18 PM
 
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I finally got my new lamp from Amazon installed, plus a wide colour gamut filter! The one from Epson projectors, costs 20 bucks.

Colours are stunning with only a rudimentary recalibration although I'm sure what I've done isn't accurate / appropriate. Reds look deeeeep red now, not orange. But man, is it dim. Even though I've got a brand new bulb in there it looks about as dim as my old 4500 hours one. So the measurements on the Epsons are accurate: about a 50% drop in lumens from these filters. I really wonder how JVC gets to P3 on a lamp-based projector with only a 12% drop. This is to be investigated further.

All I did to get WCG on my w1070 was unscrew the metal lip holding in the front glass on the new lamp assembly and place the Epson filter glass on top then screw it back on, and voila.

Super cheap, easily reversible. I tried putting the entire CF (cinema filter) assembly including frame in the light path but that shattered the glass due to some rattling of the blower fan when I had it on my table (no rattling when the projector is mounted upside down thankfully). I managed to use the remaining glass piece which was big enough, to fit perfectly under the metal clip I mentioned.

I'll share some pics of the procedure if any are interested. Gonna try some rec 2020 / P3 content soon and hack away at some tone mapping operators in order to give me unmolested / pure colours. Sadly my GTX 970 isn't fast enough to decode HEVC Main10 profile (HDR10) content without choking. Gonna have to upgrade soon.

Also, I wrote a shadertoy demo to get 120 fps working in 2D on my w1070: simply activate SBS mode after putting this shader in fullscreen:

https://www.shadertoy.com/view/4sfcR8

I got the idea from blurbusters.com who discovered some Optoma 720p projectors effectively have a low-persistence mode while 3D is activated. I got the same working on the w1070 (enable the BFI frag colour line: lumens cut in half but motion blur is too). It should be do-able to have a DX11 wrapper to get 120fps working in 2D games.

What's even more interesting is the possibility of the same thing working for 4K / 120hz on the new 4K DLPs coming out:

https://www.shadertoy.com/view/lslcRr

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post #11933 of 12131 Old 02-12-2017, 06:52 PM
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Please post pictures of how you installed the filter and where did you get it from thanks.

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post #11934 of 12131 Old 02-14-2017, 07:53 AM
 
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Update: don't buy these lamps from Amazon!

They are dim out of the box. I thought my image was dark due to the Epson cinema filter being in there but when I took it back out it was still dim.

I also will have to open up my projector to clean dust specks off the mirrors inside the light cavity. Doh. And also, while fudging around trying to stick the WCG filter right behind the metal sheet of the colour wheel, I managed to warp it a bit and now the right side of the screen has a different colour tint. Pretty sure I can undo this mistake and fix it though.

Fun in DIY land!! That all said, the black level on this new lamp seems incredible, even with the CF filter out which I thought was responsible for the darkness originally. Contrast is better than I've ever seen it on the w1070, looks almost HDR like. I watched the old movie FX and there's lots of rainy night scenes in New York and it all looked just stunning. Even the reds on AVS forum looked actually red not orange like they do on my monitor right now. No wonder some JVC fans are enamoured with the manual iris, black level is king.

What I've learned through all this is that the projector's capabilities are largely held back by the light source and colour wheel, and that yes, definitely 1080p is enough and what we really need are mega contrast projectors doing HDR and WCG.

With the WCG filter in the projector looks better than I've ever seen it and that's with only basic colour calibration. Of course that's without even using native P3 material (yet). I definitely give mad props to JVC for getting WCG to work at only 12% lumens cut. That's probably due to decent P3 coverage even without the filter, so the filter needs to do less to bridge the gap from rec 709. However I definitely don't think it's worth an extra 3 grand.

Here's a pic of the lamp with WCG filter jimmied in there:



Yeah, the glass cracked AGAIN (I have a spare filter anyway), but I think it's easily still big enough to stick the remaining piece and in front of the collimating rod instead. I don't believe it matters whether you put the filter before or after the colour wheel (I could be wrong about this). Anyway, if I do it that way, I definitely want to stick it on some kind of lever so I can put it in the light path or out using a metal pushrod poking out of the projector. I have some more pics but the above one shows the basic "hack" which requires no projector mod whatsoever. I even have a spare lamp assembly so I could put one lamp for WCG and one for rec 709.

I might buy a new lamp anyway. I wonder if it's possible to use a higher watt bulb instead of the default, for more lumens. Has anyone tried that? If I can get bright WCG I will be in heaven and maybe not have to upgrade this year.

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post #11935 of 12131 Old 02-14-2017, 09:57 AM
 
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Has anyone tried putting in a more powerful lamp from another projector to boost lumens?

http://hometheaterhifi.com/reviews/v...jector-review/

The lamp is 240W which is the same as the w1070's and costs $200 bucks retail:

https://www.bhphotovideo.com/c/produ...for_mu686.html

or for Canadians:

http://www.pc-canada.com/item/5J.JFM05.001.html

If I don't buy a new PJ I will definitely consider getting this.

Of course it might overheat and lamps are non-refundable...Maybe I'll try to do a contrast mod first (secondary DLP in the light path with a relay lens, or maybe just a lower res greyscale LCD with a high aperture ratio for luma attenuation only).

To get HDR you need to boost both contrast and peak brightness so extra lumens would come in handy definitely. Not to mention for WCG filter on its own.

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post #11936 of 12131 Old 02-15-2017, 03:01 PM
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Quote:
Originally Posted by AV_Integrated View Post
There is one conventional wisdom on lamps: Buy from the manufacturer. Right from their website.

They offer minimal discounts to 3rd party sellers who tend to have very close pricing, and anything cheap is often just that... cheap.

There is no world which currently exists where I would just go here and drop the $245.

https://www.benqdirect.com/accessori...0-w1080st.html
I'm confused by your response, what are you recommending? On the one hand, you seem to suggest anything other than manufacturer-purchased bulbs are not good quality. And you also say there's no way you'd spend the price for a bulb from the manufacturer. Appreciate your input!

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post #11937 of 12131 Old 02-15-2017, 03:38 PM
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Quote:
Originally Posted by niccolo View Post
I'm confused by your response, what are you recommending? On the one hand, you seem to suggest anything other than manufacturer-purchased bulbs are not good quality. And you also say there's no way you'd spend the price for a bulb from the manufacturer. Appreciate your input!
That was a typo. I just fixed it. Should read: "There is no world which currently exists where I wouldn't just go here and drop the $245."

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post #11938 of 12131 Old 02-15-2017, 03:54 PM
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Not very scientific to install a cheap non-OEM lamp at the same time you're installing a WCG filter for the first time and compare performance to an older OEM lamp without the filter.

But doing it the right way by first installing a new genuine OEM replacement lamp without the WCG filter, watching for a few hundred hours and then installing the WCG filter and measuring the difference in performance would certainly be an interesting experiment.
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post #11939 of 12131 Old 02-15-2017, 04:10 PM
 
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I did it both ways and yeah I agree it wasn't scientific the way I described it. However I don't have a lumens meter anyway (yet) so no matter what I see subjectively will be suspect.

Actually the drop in lumens seems to be partially due to the reflecting mirror inside the optical cavity of the projector being partially disintegrated! I used some kind of screen cleaning fluid two years ago. When I took the WCG filter out to try the new lamp on its own it was still very dark, and that's when I opened up the optical cavity to discover a nasty surprise. It must have been disintegrating slowly over time and putting in a new / brighter lamp didn't substantially improve things. Anyway, I've got a glass cutter and some small mirror samples coming in the next few days so I should be able to carve out a replacement mirror. The part # in question seems to not be orderable by anyone except repair centers.

On the plus side, I did clean out the entire optical assembly, including the lens, so it's pristine and hopefully will work properly soon. If it does, then I'll re-evaluate how bright this particular lamp is. My last replacement lamp from China (still working) lasted 4500 hours on SmartEco, so I think that's a good value for 80 bucks.
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post #11940 of 12131 Old 02-15-2017, 05:19 PM
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You are one of the lucky ones with cheap replacement lamps. Lots of stories on the forum recently of early catastrophic failures. Also the cheap replacement lamps are not likely to be as color balanced as the genuine OEM replacement lamps. But if you don't have equipment to measure color accuracy it may not matter to you.
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