LG PA70G LED 1280x800 700 Lumens. - Page 59

Ok guys now the thread is going Off Topic, please start a new thread if you wish for the eye strain/sickness related stuff.

I had it back when I first bought my InFocus 4805 so it's not only related to the PA70G.

Jason

http://www.monoprice.com/products/subdepartment.asp?c_id=102&cp_id=10235&cs_id=1023503

Jason

Do you know for a fact that this cable works with the pa70? I have tried these RGB cables on several older sanyo projectors and they do nothing. You need a converter to make it happen.

thanks

Bohanna

I don't know for certain, but in the description, it states this is for projectors that have vga connection that accept RGB as input. And there is in manual a device like this. Now I don't think you can plug it into just any VGA port, but only for PJ's that have that feature. The PA70G I would think would fit the bill. But I don't know, so don't get it and blame me if it doesn't work. There are a number of user reviews on monoprice for this product. Maybe read them , maybe someone did buy it and can tell us for sure.

You are right about making sure you get the right one, I looked at amazon's collection like this and they DID NOT GET GOOD reviews.

Look on page 55 of the PA70G owners manual, it accepts Component over the VGA (15 pin Dsub) so yes these cables should work if they are wired properly (which they should be since that is exactly what they are designed to do).

People not getting them to work were under the impression they could use them with any device, the function must be built in otherwise a transcoder is required.

Jason

tanx

Bohanna

Thx will check links.... Thank God I have never had an illness or even broken a bone. I just remember reading years ago about projectors causing seizures in some people. Never experienced an episode on HDTV panels but then again I didn't experience symptoms in a theater. Only noticed a sensitivity with this product

DLP projectors are known to give some people eye strain and headaches, that's indisputable, but these LED projectors are not nearly as bad as the ones that use a color wheel. I never noticed any rainbows on any of the LG LED projectors I've owned, but I saw tons of rainbows and suffered eye strain when I had my old mitsubishi HC1500 a while back.

I would like to try the lens mod for my PA70G even i paid 1k $ for it. Can someone please tell what lens i would need and where to buy it? Preferable it should have zoom and fokus and persists of glass not cheap plastic since after reading and evaluating the posts here it might be the reason for the lower sharpness compared to the Acer K330. I agree that the overall picture specially when it comes to contrast and blacks is better on the PA70G it still has the worse sharpness and this even on the better units out there.

To add some informations i found it is not only the plastic lens but the fact that it might be too small for the lightpath to collect the whole picture and therefor loses sharpness on either side.
When i disassembled the lens and tried to set it as perfect as possible either the right or the left side was slightly more out of focus than the other. This is in my opinion because of the too small lens that cannot be adjusted perfectly infront of the lightpath.

So i would like to try a better/bigger quality glass lens and also cut some holes for the zoom/focus sliders into the plastic case. I only need the information where to get spare parts other than ebay cause i checked this and it doesnt provide me enough info if it would fit or not. Thats the point where i rely on your help in this forum who have more technical knowledge about this than i have. Im more the Notebook Modder type than beamer type.

Every helpful information for this mod is welcome. Results in return will be posted with pics of course.
Edited by thomask1979 - 2/20/13 at 6:50am

thomask,

The admittance that you cannot obtain uniform focus (even after tweaking) shows that you do not have an 'awesome' sample as my current unit has no such issue.

My first of three units did have exactly that issue and while its image was good it did not match the image of my current (third) unit which is about 98% uniform side to side & top to bottom (and if you have been around projection long enough you know this is excellent especially at this price point, meaning full msrp).

I know the frustration of obtaining projectors that do not live up to expectation but I have always exchanged (or returned) until I was satisfied. It sounds to me like you are bitter because you happen to be stuck with no alternative other than an attempt to send to LG and hope for something that is not likely to be fixed and probably considered within spec for this model. So again I see your frustration, I sympathize and wish you the best of luck.

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While I have the utmost respect for those that venture down the modding path, as I used to do so, the real world success rate of 'frankenstein' projectors is very low (other than maybe CRT) and just not worth it for the vast majority.

So while it is of interest to a select few it is not really something to directly discuss in a thread such as this that focuses on the model as it comes from the factory (even when unsatisfactory ), a link in this thread to a new thread on the subject would be the right way to approach it (much like the eye strain issue which is far from being limited to this particular model as there have been many discussions on it here at AVS over the years).




Jason

What is the best way for a novice (me) to test for "uniform focus" on this projector? Is there a test pattern provided in the PA70g menu (I didn't see it mentioned in the PDF manual) or are you using something from a connected PC? Also, is there an ideal distance from which to test (say 10 feet?).

And 98% uniform...is that saying there could be a blurry edge (extreme top, left, etc) or is this a case when projecting an all black image, there could be lighter black levels in the corners?

If I get this PJ I would have no problem exchanging it until I got a good one - I would just like to know what you all used to reject previous units.

Thanks folks!

David,

If you get right up at the screen with a solid light color it's pretty easy to make out the pixel structure if you have a solid unit and have optimized the focus.

Text works well at 1280x720 or 1280x800 but don't try it at 1920x1080 due to the suspect scaling it will not look sharp.

If you find yourself pushing the sharpness setting above the mid-range area then you likely have a poor lens or you like looking at an over-processed image with EE and ringing (lol, not trying to be mean here but I have seen some displays in homes that had me saying WTF).

Dark/Light corners is not something I have seen on any of the three units that I had so I'll guess that is of no concern here. I tested each of the three in their full 16:10 mode by sending 1280x800 and having the ratio set to Full and did not see any black or color uniformity issues. You may notice the slight extra green in the out of the box image but this can be mostly tweaked/calibrated away (obviously proper calibration gear goes a long way in that regard and I realize most are not going to pay for a pro-level calibration on such an inexpensive unit... although it certainly does benefit from it by a decent margin).

You have the right attitude in approaching this unit by being willing to exchange until you are satisfied as my gut feeling tells me that the majority simply will not land a solid performer on the initial unit (I sure hope you all do but I am just being honest based upon this thread and what my own PA70G experience tells me).


* Oh an one other suggestion to ThomasK, try a Darbee Darblet... you may find the added clarity enhancement + perceived sharpness a worthwhile investment.

Best of luck everyone !!!
Jason
Edited by DaGamePimp - 2/20/13 at 11:38pm

I am thinking of maybe exchanging this for LG PB60G and getting a bit of money back. Does anyone know if the PB60G has an even focus and less RBE?

My one time viewing a PB60 did show slightly better focus versus a solid PA70G but as always YMMV.

You may have less RBE with the PB60 due to less lumen's/contrast but nobody can tell you for sure one way or the other how you will see it as it is a perceptual anomaly that varies per individual. Meaning you could take 5 people that are RBE sensitive and show them the same 5 DLP projectors and you would likely have different reports on the level of RBE from each person for each projector. I have a friend that cannot even watch a <300 lumen D65 5x 7 segment (RGBRGB+ND) colorwheel DLP without RBE but he viewed the PA70G and had no RBE issues.

Best of luck,
Jason

As i already stated twice i can see even a more precise pixel structure than you who is claiming to have an "awesome one" on the 3rd attempt. I think im just more picky and of course frustrated for having payed so much without possiblity to give it back now. I also dont want to exchange it for a unit that is maybe even worse and doubtful much better than my current.

To help me finding a fitting glass lens would be much more appreciated than anything else. And thanks btw for the info. After i was suspious about the plastic or glass issue i looked more precisley and it really seems to be cheap plastic. What a shock... these ******** really use plastic on a beamer for the lens. I mean how greedy and low can a company be? Even the SP-F10M which was cheaper than the PA70G had a HD zoom glass lens of really good quality. Too bad its now double in price than 1 year ago.
It sells for 1325 $ now.


I read about it and watched some vids. Thats a really good idea and i thank you for this hint. But the Darblet Darbee is minimum 424 $ + 40 $ for shipping in Germany which is a bit expensive in my opinion. But i guess its the price we pay here for voting for Chancelor Merkel again lol. Anyway i watch the price of this interesting toy if it ever comes down to at least 300 $ i might just try it.

The PA70G has come down in price now in Germany to only 661 $ which is not that much higher than in the USA. Seems for me like they are throwing it away now to have room for a new product who knows. Few days ago i saw it for 860 $ at lowest price but the 661 $ are constant on every online shop now. Hopefully LG or better another brand will publish a better more solid product soon.

In hope for that im ready for a "Frankenstein Beamer" experiment on my PA70G. Please support me with the info on what kind of lens i have to watch out. After that ill start a new thread with the steps and pics and result.

Greetings to the cheaper shopping country^^
Edited by thomask1979 - 2/21/13 at 12:45am

ThomasK,

Can you see the pivot dimple in the middle of each diamond pixel across most of your screen?

I can on mine and this certainly has it fitting into an 'awesome' category for such an inexpensive front projector.

I think you would get more enjoyment out of your PA70G with the Darblet in the chain but yes that is indeed expensive over there, I paid $269 shipped before the price increase and it was worth every penny. I do not use it exclusive on the PA70G, it often resides in my HT on my AE4000.

I don't think anyone in this thread knows of a proper lens alternative for the PA70G or has ventured down that path so far as to actually attempt something, so we are not withholding information from you (I think it's simply that nobody knows or takes trying it seriously).

Best of luck and be sure to keep us posted if you discover something interesting, I know I would click that link with interest even though I would not do the mod (well maybe a few years down the road).

Jason

Thanks, I don't really care if it is slightly soft focus. As long as the focus is consistent over the screen. I am just afraid that I may waste energy/time/money to exchange it for the PB60G and also get an uneven focus or even worse focus...The PB60G thread is too short to get any good info on it

Sorry i dont understand what you mean with pivot dimple but i can see the diamond fields very good and slightly better than on your pic. I tried to capture them but i dont have a zoom cam.

Its not inexpensive world wide only for US and maybe one or two other countrys. In most countrys it has or had a much higher price so of course the expectations are also higher. Problem is the lamp based projectors with way better picture quality are also way more expensive here so thats not really a better option. Specially not considering the lamp exchange and energy costs. 1kwh costs now 23 EU Cents + and it may raise next year.

I will definetly wait for a price drop and buy it then. sounds and looks very promising.

Ok i understand. Im coming from Notebook Forums where modding was more involved and seeing Pawel is going into this direction in this thread gave me some hope. Anyway without infos that obviously nobody has i cant do this mod. I wish LG would post more infos about the parts and specially lens even its a cheap plastic one :P.

Here are some pics of my screen while daylight on the southside of the house with blackout drape covering most of the windows. Maybe it helps you to figure out if i got a good / awesome or really crap unit.



Avenger at daylight with blackout drape at 3 meter distance.



Same as above but closeup.



Same Movie Closeup of a not so ugly face

For Comparison here is an old Picture of my SP-F10M in the evening few months ago.



As you can see it is superior in brightness and colours lacks a bit in blacks but the sharpness is clearly better. Only problem was i had to mask the upper and lower part of the wall cause of the native 4:3 Epsons LCD Panels. Cause of my experience with these 2 projectors i do favour LCD over DLP anytime. Its brighter, has way better colours and the square pixels combined with a good lens are giving an awesome sharpness even at lower resolutions.
Edited by thomask1979 - 2/21/13 at 3:11am

Based on the pictures above, if you only use this for movies only and nothing more, you've got a good one, I don't know why are you saying that this Pj is a waste of money. Did you able to connect this pj with your HTPC?
Mine also is a led pj but not LG and suffers from unsharp projected images, but when I use my HTPC with power dvd 12 player its a lot of improvements in overall image, only that have a low lumens, that's why I am going to upgade into this Particular model.

Good day, someone here bought this month February projector pa 70g and how's the situation of focus?

I looked at a few merchants online who sell projector lens and the cheapest I saw was way more than what 2 or 3 of these projectors are worth:(

Then I went to Ebays and saw a motorised Mitsubishi lens for $ 50

Don't know if a Mitsubishi or a old Infocus lens would work but anyone where with a little money to spare and experiment could try.

I just saw a old Runco CL-610 Reflection DLP Projector Lens for $ 9 on Ebay.

I wonder if ? as long as the screw holes line up and has basically the same light path would a old better quality glass lens would work ?

I don't know yet what kind of used DLP projector lens would works in a retro-Frankenstein projector experiment because I at this time don’t' have the money to buy a LGPA70G until I can fix a few more things on my car and pay off some medical bills.

One person here who has some knowledge is Pawel.

Hey Pawel ? have not heard from you lately, how are you buddie ?

I guess light physics is light physics no matter what brand the projector is.

I am just guessing so as long as the optical path physics are the same and the screw holes and the lens mount holes line up ?

I'll leave all the math involved to Pawel

Would be nice if someone were to buy a used inexpensive lens with a motor that would work nicely with the LGPA70G.

The reason why I mentioned about using a old DLP projector case is that you would have more room inside the case to experiment.

The Acer K330 case is to small for what it is and creates heat inside the case because one of the LEDS is not cooled properly and I saw where they put the DLP chip near the power supply , a big no no.

The venting path in the Acer K330 is not well thought out either.

If anything someone with the funds could just drop the LGPA70G inside a larger bulb based DLP projector without even taking the LAPA70G apart and use the lens path of the old DLP projector so as long as there is proper venting for the heat.

The lens is very interesting, but looking for something more to say, you need to have a description of the optical parameters for both lenses, but I do not think it will improve the image quality can improve a little sharpening, but the quality remains the same, because at it also affects many other factors, alone the fact, diamond arrangement of pixels, much worse display and image recorded in a traditional arrangement pixels, twozenie such dziwolongow pozabwione is the smallest Sesué and surprised me with a projector manufacturers decide to use them.

Prostokonty and straight lines in such a system will never have a sharp edge, and will be blurred, it is as if hit your triangular block in the square hole, well, I just can not be .

PA70G if you buy it with confidence, improve focusing lens is nothing complicated and gives astonishing effect, but it is always some, can not be done so that the image had every pixel in Focus Ideally there will always be some small area, which did not affects the feeling while watching, can be observed closely and exclusively only on images of control

In my humble opinion, only get rid of prisms and mirrors to insert, can somehow influence the effect of the aberration.

But Pact DMD pixel in the matrix, unfortunately, can not be changed so always, the text written in small print in advertisements dietary supplements will not be readable. A LCD TV the same text can be freely read.

You can find another projector with the brightness if you hit a square arrangement of pixels is chosen I would like that!

I am happy with PA70G although it could be better, as we have no influence.

However advanced picture settings to customize the factory modes do not meet me completely, I set myself one of the expert mode, so the image of the HDTV is both a contrast that and visible detail in dark areas.
Ideal for the viewing of the maximum energy saving.

Recent times, I have a lot of work, and quite heavy conditions , so I practically take a shower, eat dinner and half I go to sleep I do not have the strength even on a 3D printer folding but sometimes peeks here: P

Trai this http://www.komputerswiat.pl/media/1158183/ObrazKontrolny.jpg

Jason,

Thank you for the thorough explanation.
Seems simple enough.

...edit - spelling
Edited by David44 - 2/21/13 at 12:40pm

Pawel,

Ha! Now that looks like a test most projectors would struggle with!!
My guess is that I need to sync my PC screen size to the projector display so as not to skew the image?

Thanks for your help!

1080p patterns are of little use to test sharpness due to the LG's internal scaling (their 'just scan' ratio option).

Send 1280x800 via pc for best results on testing focal sharpness by eliminating as much scaling error as possible.

This is only if you are a purist and want to see the unit at its best, if you have no intention on using a pc your best option is sending 720p.

Here is a nice 1280x720p native pattern courtesy of TigerDave... (makes sure it is at full size if you plan to save it and use it)

http://tigerdave.kicks-ass.net/forum/testpatterns/1280x720_overscan.gif

Here is a nice little set of calibration patterns that I have used for years courtesy of Colorfacts...

CFTestPatterns.zip 257k .zip file

Here is one for setting tracking/phase if you use VGA (set to desktop background as Tile)...



Jason


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Edited by DaGamePimp - 2/21/13 at 2:53pm

The pivot dimple is a small dot that can be seen in the middle of each pixel on DLP projectors if you have capable focus. It's where the micro-mirror is connected, it's pivot point.

** Oh and a suggestion would be to try some darker material above your screen temporarily and see how much your image improves since it looks like you are probably washing out partially from all that ceiling reflection (since the screen is so close to your light colored ceiling). My ceiling is light colored as well but it is the 'popcorn' style texture which is less reflective and it is also several feet above the top of my screen.


I'll let you judge that one for yourself...









Jason


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Edited by DaGamePimp - 2/22/13 at 12:28am

These are great images compared to "thomask1979 posts". I don't know because of his camera? or in his environment? there are many factors to consider, but definitely you've got an awesome pj,
DaGamePimp, just wondering if you are using your "Darbee Darblet" for this images? Thanks