My '04 mitsubishi CRT tv just went out 2 day's ago.I've been looking to get a projector I'm opting for a digital projector because of convergence issue's with CRT projector's.What convergence issue's if any are most common on digital projector's? also what technology would have a better gaming picture.

Welcome to the digital projector forum. Now please be prepared to never stop reading. :)

Basically the only thing that guarantees no convergence issues is a single chip DLP. Why? Single chip, so no alignment. Other than that...DILA, SXRD, LCD, etc...all have the potential. We offer a service called Premium Service that does 2 things. First, we check over for common issues...such as convergence...before we ship it. Pending it checks out okay, we then calibrate it fully. I only mention this because whereever you go to get one, this is about the only way you'll know for sure there aren't any major problems.

Regardless of any pj purchase fix the mits and keep it. Mits are excellent CRT's.

The best convergence on any three panel device I've ever seen is the SIM HT 5000.

Here is one of the corners. Nowhere is it off by more than 1/4 pixel.

http://i127.photobucket.com/albums/p146/CarlosMeat/Focus08a.jpg

Art

Hope all this helpful to you. :)

The best convergence on any three panel device I've ever seen is the SIM HT 5000.

Here is one of the corners. Nowhere is it off by more than 1/4 pixel.

http://i127.photobucket.com/albums/p146/CarlosMeat/Focus08a.jpg

Art

For $50,000 it better be that good this will be my first projector right now I'm looking at the sony VPL-VW60 & other projector's around that price range but not higher.My biggest worry is convergence because I just can't stand warping,bowing ect..Another worry I have is input lag I play a lot of video game's & also a blurred image while playing game's any recommendation's within my price range would be appreciated.

Since your stated requirements doesn't includes attributes such as CR, accurate color, 1080p or such I suggest that you save your money and get yourself a pj like Optoma 72.
It is a good pj for the money and great for gaming. Read its dedicated thread in sub forum if interested.

Since your stated requirements doesn't includes attributes such as CR, accurate color, 1080p or such I suggest that you save your money and get yourself a pj like Optoma 72.
It is a good pj for the money and great for gaming. Read its dedicated thread in sub forum if interested.

My biggest concern is convergence but the attributes you mentioned are also a high concern you can't have a good picture without good convergence

My biggest concern is convergence but the attributes you mentioned are also a high concern you can't have a good picture without good convergence

Optoma 72 is one chip DLP and should not have convergence issue. And it is bright. It is a favorite pj for gamers. And it is cheap. If you are RBE sensitive then Sony VW60 would make an excellent choice. Talk to Jason and he will cherry pick one for you.

What about the Optoma HD8000 any feedback on this model?

What about the Optoma HD8000 any feedback on this model?

The best advice I can give is to see each of the different technologies for yourself. Typically DLP has the least issues with motion blur and if you're not sensitive to RBE (rainbow effect) then give them a whirl. I would suggest that you try to do an extended demo (at least 30 min of continuous watching) and see if you feel that your eyes are strained. Some people have complained about eye fatigue from DLP, thankfully I'm not one of them.

If black levels are paramount, then the market leaders are LCoS/SXRD at the moment (a very general statement!). If price is the biggest concern then I believe LCD has the lead there with some good budget projectors. There have been several posts about using the different technologies for video games, give the forum a search and you'll turn up a few posts on the topic. I think you'll be interested in the experience of current owners and their favorite tech and why.

My personal favorites at the moment: Planar 8150 (DLP); JVC RS-1X (LCoS); Panasonic 2000 (LCD). There are pluses and minuses to each; good luck with the search and definitely let us know how it's coming along the way!

~Andrew

What about the Optoma HD8000 any feedback on this model?

Here is the link to Optoma'd pj's. There is no 8000.

http://www.optomausa.com/productcategory.asp?productsubcat=3&productcategory=Home%20Theater

The best advice I can give is to see each of the different technologies for yourself. Typically DLP has the least issues with motion blur and if you're not sensitive to RBE (rainbow effect) then give them a whirl. I would suggest that you try to do an extended demo (at least 30 min of continuous watching) and see if you feel that your eyes are strained. Some people have complained about eye fatigue from DLP, thankfully I'm not one of them.

If black levels are paramount, then the market leaders are LCoS/SXRD at the moment (a very general statement!). If price is the biggest concern then I believe LCD has the lead there with some good budget projectors. There have been several posts about using the different technologies for video games, give the forum a search and you'll turn up a few posts on the topic. I think you'll be interested in the experience of current owners and their favorite tech and why.

My personal favorites at the moment: Planar 8150 (DLP); JVC RS-1X (LCoS); Panasonic 2000 (LCD). There are pluses and minuses to each; good luck with the search and definitely let us know how it's coming along the way!

~Andrew
+1

One thing to keep in mind with single chip DLP is that it can't have convergence issues, but can have chromatic aberration issues, which can look similar.

--Darin

One thing to keep in mind with single chip DLP is that it can't have convergence issues, but can have chromatic aberration issues, which can look similar.

--Darin
I hope that is just with DLP's!:)

One thing to keep in mind with single chip DLP is that it can't have convergence issues, but can have chromatic aberration issues, which can look similar.

--Darin

Does it develop over time? or a projector either has it or doesn't

chromatic aberration comes from the lens. It does not develop over time. Most projectors have rather cheap lenses.

Lens shift often has a big influence on the amount of chromatic aberration.

You ask a question. You want to minimize misconvergence. Then later you state how GEOMETRY (such as bowing) issues on a CRT bother you. Two different things. None of the digital projectors will have geometry issues providing you set them up physically in the correct relationship to the screen and the screen is nice and flat without bows etc in the frame alignment.

Convergence involves overlaying the red, green, and blue grids from. in a CRT, three different guns and in 3 chip digital machine, three chips, each chip handling a primary color (red, green, or blue). Unlike a CRT, where one can bend the electron path of the beam hitting the tube phosphers, there really is no way to bend the light reflecting off or through each chip. One would have to be able to adjust each chip's position precisely and minutely and the lens would have to have no CA. No three chip machines have owner or dealer adjustable chip positioning. The best, from the factory, the HT5000 is over $60K now,

To eliminate misconvergence, go for a one chip DLP machine. There is nothing to convege. Although there could be the appearance of some misconvergence type errors due to lens CA. Geometry issues should not be a problem with proper set up, something only possible with a proper set up om site of your projector and screen.

Generally, the more expensive the projector, the better the lens will be and the less or elimination of CA. Keeping the image centered in the lens is important to eliminate CA. Once again, a physical mounting of the projector in relationship to the screen issue.

On some digital projectors, images can be moved up or down or side to side on the red and blue grids by units of one grid line. Thus if convergence is off by more than one line, it can be shifted. Unfortunately, misconvergence often varies depending on where you are looking on the screen. Some projectors use tricks to mask misconvergence. Allowing grids to be moved in tenths of grid lines either across the entire grid or by grid zones. This is done by generating the grid lines by combining pixels, costing you sharpness and resolution where done. Look Ma, no more misconvergence complaints. Ugh. A terrible idea of a fix.

Bottom line for recommendations. What's you projector budget? What are you set up conditions and room environment. How large a screen. Yada Yada.

For $50,000 it better be that good this .

I'd like to point out one of your questions was about digital projector convergence. I'd also like to mention that I've seen many three chip projectors (SXRD,DILA and DLP) with much poorer panel alignment than I show with the HT 5000 and many of them cost more, sometimes mutiples of the cost of the HT 5000.

Art

The reason for the great convergence on the HT500 is that the chips are adjustable at the factory on the x, y axises. Most three chipmachines are soldered or cemented into place at the time of manufacturer of the light engine, usually an OEM piece. The Sim2 engine is not manufactured by Sim2 but it is highly specified by them including the ability at the Sim2 factory to adjust the chips. because the machine can be used with about 7 or so different lenses, chip alignment is done independently of the specific lens that will be used. These equires very accurate adjustment of the chips so that tight alignment will be there regardless of the lens chosen.

Hey Mark your right I was asking the wrong question geometry is what I was trying to say.So your saying no digital projector's should have geometry issue's provided you set up the screen & projector properly.My budget is $4,000,room size 16x16,light controlled room,100inch+screen

Providing you screen is set up correctly, no bows in the frame, level, perpendicular, with the right vertical offset or within the limits of any available lens shift, and the lens front is parallel to the screen, geometry should be perfect If you don't get a perfect rectangle, you have done something wrong in the physical set up. Do not ever use the trapezoidal adjustment if available on the projector. Set it up right.

If you gowith a single chip DLP, you will not have misconvegence as there is nothing to converge. If you see grid lines not overlaying, this with a one chip machine would be due to CA of the lewns. Minimize this by minimize the use of lens shift. Lenses are best from a CA point of view when the image is centered in the lens. Set up again.

At a $4K price point, the lens used in your projector will most likely perform well but not great from a CA view point.

Considering that you are coming froma CRT, if you are willing to live with some misconvergence, I would go with a three chip non DLP machine, to get blacks closer to what you know have.

There are lots of projector choices after discounts at or not too much above your price point. I personally like the Sony VPL-vw60. Many like the JVC RS1,but tome the lens quality is not acceptable, soft with significant CA. But many ae not botheed by the lens deficiencies or the oversaturated colors of this machine.

There are many choices. If you want to discuss, pleasePM me or call me at 240 876 2536. I have a CRT as my primary projector but also use one and three chip digital projectors as well.

What about the Optoma HD8000 any feedback on this model?

do yourself a favor, stay away from their latest 1080p dlp offerings, nothing but trouble and the company is slow to deliver any effective solution, I suggest you read for yourself a thread totally dedicated to the Optoma HD81 and see for yourself.

I hope that is just with DLP's!:)

It isn't. CA is causd by the lens, not the technology. EVERY projector has some CA...how much depends on the quality of the lens used on a particular model.