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VIVITEK QUMI LED 1280x800 - Page 56

post #1651 of 2165
Quote:
Originally Posted by 3DNewb View Post

What hardware are you able to make work via the HDMI connection and in what formats?

I managed it to work on awindows 7 pc with an ati card (hd6970) in 1024x768 and 1280x720 resolutions both at 120hz.
I'm using it for 3d movies playback (pageflipping) and gaming (iz3d 120hz).
post #1652 of 2165
Quote:
Originally Posted by holto View Post

Hey guys,

I was looking last night and noticed that I have a very tiny gap at the top of my front lens... is this present on any one else's? I love this thing, but have discovered I do have the floating focus issue. I really don't want to have to return through amazon, I'm probably a few days past now anyway. Ugh.

How difficult is it to take apart and would it be worth it to try and fix the lens?

Thanks guys.

Awaiting for brave people . I need the solution too.
post #1653 of 2165
Quote:
Originally Posted by snakeman View Post

guys-

please help me.

I need to get into the sevice menu to turn down the saturation and pull out the slight green tint from black /white movies.

do the pixels on the left of the screen have the exact same green tint as those on the right?
post #1654 of 2165
Quote:
Originally Posted by boyopo View Post

Awaiting for brave people . I need the solution too.

Perhaps a higher quality optic lens can be purchased and inserted. I am afraid the tolerances would be tough to meet! There is no way i'm opening up my qumi to find out i'm too afraid of throwing it off, somehow.

Would love to know however! Anyone?
post #1655 of 2165
Even on my "better" third try QUMI, the alignment (as i've come to consider it) of the green color is off a little on the right-hand side (which is so subtle as to be excusable). i hypothesize almost every qumi has the chromatic aberration problem, and the lens coating or alignment of the LEDs internally was ill engineered during production. Was their "yield" was so low (and such a loss) that they knowingly distributed projectors with misalignment? Am i paranoid? I am sorry to say I have a hard time recommending this projector (my first vivitek purchase) without some response from the manufacturer about it.
post #1656 of 2165
Quote:
Originally Posted by circlecycle View Post

Even on my "better" third try QUMI, the alignment (as i've come to consider it) of the green color is off a little on the right-hand side (which is so subtle as to be excusable). i hypothesize almost every qumi has the chromatic aberration problem, and the lens coating or alignment of the LEDs internally was ill engineered during production. Was their "yield" was so low (and such a loss) that they knowingly distributed projectors with misalignment? Am i paranoid? I am sorry to say I have a hard time recommending this projector (my first vivitek purchase) without some response from the manufacturer about it.

I think the saying....you get what you paid for here should hold true.

I doubt this was designed for actual home theater use in mind. Like many have said previously, it is for the road warrior.
post #1657 of 2165
However, that QUMI so badly shows?
Or the author of this video says lies?
(Excuse for computer transfer)

http://www.youtube.com/watch?v=YCYzu6IhbSc
post #1658 of 2165
Quote:
Originally Posted by PoisonWolf View Post

I think the saying....you get what you paid for here should hold true.

I doubt this was designed for actual home theater use in mind. Like many have said previously, it is for the road warrior.

and what, a road warrior doesn't need sharp text?
post #1659 of 2165
Quote:
Originally Posted by circlecycle View Post

Perhaps a higher quality optic lens can be purchased and inserted. I am afraid the tolerances would be tough to meet! There is no way i'm opening up my qumi to find out i'm too afraid of throwing it off, somehow.

Would love to know however! Anyone?

Hello circlecycle , I need your advise ,if i really want to open cover of qumi, i hv to remove the rubber under qumi before right? The rubber will damage or not?
post #1660 of 2165
Quote:
Originally Posted by viardo View Post

However, that QUMI so badly shows?
Or the author of this video says lies?
(Excuse for computer transfer)

http://www.youtube.com/watch?v=YCYzu6IhbSc

LG looks better, but who knows it's youtube.
post #1661 of 2165
Quote:
Originally Posted by viardo View Post

However, that QUMI so badly shows?
Or the author of this video says lies?
(Excuse for computer transfer)

http://www.youtube.com/watch?v=YCYzu6IhbSc


I think in youtube he set qumi in Movie mode ,too dark and low details ,choose use custom setting.
post #1662 of 2165
Quote:
Originally Posted by boyopo View Post

Hello circlecycle , I need your advise ,if i really want to open cover of qumi, i hv to remove the rubber under qumi before right? The rubber will damage or not?

I had stated earlier that I thought it was the LED's that were off, but now I think it more likely that the lenses or prism are the problem and cause a prismatic separation of color. I wish I knew! I have not taken apart my QUMI so I can't help you, I'm sorry. Someone in this thread DID do that, however, and I would email/ask him.

Good luck and please write (even briefly) or post pictures of what you see and find out!
post #1663 of 2165
Quote:
Originally Posted by circlecycle View Post

I had stated earlier that I thought it was the LED's that were off, but now I think it more likely that the lenses or prism are the problem and cause a prismatic separation of color. I wish I knew! I have not taken apart my QUMI so I can't help you, I'm sorry. Someone in this thread DID do that, however, and I would email/ask him.

Good luck and please write (even briefly) or post pictures of what you see and find out!

Oh ,Thank I will write e-mail him.

NOw I already removed 4 screws but still cannot open the cover ,Very hard and very tight. Just open a little bit and see only some gap but still get stuck.

Anybody know please suggest point for unlock the cover.
post #1664 of 2165
Quote:
Originally Posted by hz1 View Post

I also have a popcornhour but the original A-100 model. Output set to "Auto" it will default to 1280x800. I returned my Qumi due to the light leakage. They're replacing my unit and should have on friday. Will post any changes. positive or negative. I'm hoping that this batch will be better than the first one that i got 6 weeks ago.

Do you have a news on this subject ?
post #1665 of 2165
I had Qumi for several days. One-third of the image was always out of focus so I returned the projector and I'm so glad I did that. After Sony HMZ-T1 announcement, the idea of dealing with projectors suddenly seemed silly anyway.
post #1666 of 2165
Sorry for the delay. I received my replacement qumi on the 3rd of september. And i have to say there is no difference at all. Same light leakage, warm-up time, focus and convergence issues as before. Apparently these are defects of this product and not just a bad apple. i recorded a couple samples that you can check out here.http://www.youtube.com/watch?v=PzC9fB7wy-c After some time and tweaks it looks pretty good in auto mode 1280x800.
post #1667 of 2165
Sorry, mine IS perfect, so it's not just "all bad apples", but, truly, a stink bomb of production values. The two people here with working QUMI's are in luck, but everyone else?
post #1668 of 2165
Is this your 1st projector Circlecycle? I find it hard to believe that your unit doesn't require warm-up time, doesn't have any light leakage and focus or convergence issue to any degree. This is my second LED projector and 4th projector in the last eight years. the lg-hs201 did not have any of these issues. Why don't you make a vid and demostrate how perfect your unit is.
post #1669 of 2165
Quote:
Originally Posted by hz1 View Post

Is this your 1st projector Circlecycle? I find it hard to believe that your unit doesn't require warm-up time, doesn't have any light leakage and focus or convergence issue to any degree. This is my second LED projector and 4th projector in the last eight years. the lg-hs201 did not have any of these issues. Why don't you make a vid and demostrate how perfect your unit is.

as my previous posts in this thread covered, it took three projectors to get one good one. Let me state that once I got a "good" one, i fell in love with this projector, but angry that QA issues are so rampant. I use this QUMI 8 hours a day to make my living, programming, so i am very sensitive to it's text-mode operation! I still have light leakage, and i still have warm up focus drift - but those are acceptable (to me). What I don't have is the uniformity-of-focus issue. that would otherwise prevent all text from being in focus at the same time. Not any error on my part, believe me, I now know what "chromatic aberration" is!**

you don't need a video demonstration, just the facts: the unit i have has a warm-up focus drift (ALL units seem to), an issue with light leakage around the projected image (ALL units seem to), and NO issue with convergence or uniform focus. Two that I had first had convergence issues (deal killer! I want to see code!). Because I use the qumi to write code, trust that my previous posts are accurate and detailed. If I couldn't have got sharp focus i would have never kept the unit!

My daily usage (semi-dark room, shaded window w/no overhead lighting, projector in "eco" mode @ 60 inches) doesn't reveal visible light leakage, and I live with the focus warm up drift. Since I have a "good" unit in terms of focus i am VERY happy with my purchase. Ridiculously so -- i am only worried that the horrible variance we see in quality will bite others, and that's why i post here so much.

Bottom line: I dearly hope vivitek acknowledges the problem and ships better units so I can recommend it, which I still do... But the reality is that they may fix it, but never acknowledge it, so let the buyer beware. So long as you buy from a store you can easily return it to to obtain one good one it should be okay. I shopped at a local store and made two returns, in quick succession, to get the one I kept (their last one in stock, thankfully, as they had only three... whew!)


---
**: (Okay i do have chromatic aberration but it is so minor i kept this unit. I just got lucky that the 'misaligned' component is better aligned here then on the others. That's why i believe it's an engineering issue: they forgot to tell somebody about the needed tolerance. It's doesn't seem that most are right and only a few are off (as evidenced by my own experience AND the experiences of the people here) but that the amount of aberration which i take to be the positioning of some component is freely variable amongst all units produced! Was it considered when building the projectors in the factory? Was the issue a terrible omission from spec? Following this logic, I further deduce that vivitek received a bulk shipment of units like this and they know they are misaligned but the financial penalty and bad press -- they already delayed shipment once (gee, i wonder why?) -- meant that they'd just ship 'em and see how many never noticed, since many-to-most would only use it for movies anyway, where that sharpness is far less noticeable then editing text. If i take my theory to be true, and it's hard to imagine they don't realize these a significant portion of these units can't focus text properly, then my little rants here make more sense. I am frustrated that it appears vivitek knowingly shipped bad units on a projector I would otherwise say is perfect, and that I bought the very moment I saw the specifications on.
post #1670 of 2165
Greetings for you, and thanks this topic for helping.

I created a wikipedia article for Qumi, and worked over a week, but I could not finish yet:

http://en.wikipedia.org/wiki/Wikiped...n/Vivitek_Qumi

I'd like to ask this forum, please help to finish Qumi article. Last message was from moderator: "This suggestion doesn't sufficiently explain the importance or significance of the subject. Please provide more information on why the subject is worthy of inclusion in an encyclopedia. Thank you."

So any helping is appropriate. Thank you.

Update:
Moderators accepted the article:
http://en.wikipedia.org/wiki/Vivitek_Qumi
post #1671 of 2165
ote: Originally Posted by viardo
However, that QUMI so badly shows?
Or the author of this video says lies?
(Excuse for computer transfer)
-----------
http://www.youtube.com/watch?v=YCYzu6IhbSc
Quote:
Originally Posted by boyopo View Post

I think in youtube he set qumi in Movie mode ,too dark and low details ,choose use custom setting.

ore the Lg is simply better!!! I see no reason for the author to lie
besides they sell both projectors, it would be poor business

pity Lg has aspect issue if I am correct
post #1672 of 2165
Except 5 minutes warm up time focus, there is no any problem with Qumi.

I use like a TV, 12-14 hours per a day, on a simple 50" colour wall, semi light room.

This is far the best performance / price ratio projector at the moment.
Don't worry, it's amazing product.
post #1673 of 2165
Quote:
Originally Posted by tataniko View Post

Except 5 minutes warm up time focus, there is no any problem with Qumi.

I use like a TV, 12-14 hours per a day, on a simple 50" colour wall, semi light room.

This is far the best performance / price ratio projector at the moment.
Don't worry, it's amazing product.

how many Vivitek shares do you own
just kidding
post #1674 of 2165
My Qumi is more like 15 min. warm up for it to really be sharp, and the bottom 1/4 or so of the screen still isn't AS sharp, but I still love this thing too. I've had people over to check it out and they really enjoyed our "movie night." For me, for now, this was an awesome way for me to enter the projector arena at a decent price.
post #1675 of 2165
Quote:
Originally Posted by tataniko View Post

http://en.wikipedia.org/wiki/Wikiped...n/Vivitek_Qumi

Update:
Moderators accepted the article:
http://en.wikipedia.org/wiki/Vivitek_Qumi

Hi there! I saw and vastly updated the article. Hope you like my edits and additions!
post #1676 of 2165
is it stupid to ask why you're writing a wikipedia to me it sounds more like
advertisement. QUOTE "last magnitudes longer" I guess we wont know before
you wikipedia is outdated
post #1677 of 2165
Quote:
Originally Posted by oriel View Post

is it stupid to ask why you're writing a wikipedia to me it sounds more like
advertisement. QUOTE "last magnitudes longer" I guess we wont know before
you wikipedia is outdated

you're right, it's "a" magnitude longer not magnitudes. Except for that it's all true. Care to refute any of it? Didn't think so!
post #1678 of 2165
no its your wikipedia
post #1679 of 2165
native res is wrong on the wiki-i forget what it is-odd native res
post #1680 of 2165
my QUMI does not have is the uniformity-of-focus issue !


yeeaaaa haaaaaa
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