OPTOMA GT760 : HD and 3D Ready short throw distance DLP projector - Page 3 - AVS Forum
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post #61 of 97 Old 01-15-2014, 04:50 AM
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Quote:
Originally Posted by Czilla9000 View Post



I'm having a geometry issue with the grid. Anyone have a similar issue? I'm firing about 5 feet away on a coffee table to my wall. Is this just the nature of a short throw projector? It's like this no matter what surface I fire on. Did I get a defective unit?
I will receive my unit tomorrow. Will check for this problem.

As to how to get 120 Hz (or 144 Hz) in 2D, check this tutorial: http://www.blurbusters.com/faq/120hz-pc-to-tv/
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post #62 of 97 Old 01-16-2014, 02:33 PM
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I can check mine when I get home tonight but I'm not exactly sure what your issue is. If you give me a better explanation I will see if mine is doing the same thing.

I've had mine for about a month now. My son uses it for his PS3 and I watch a lot of sports. So far so good. I have a cheap Accuscreen fixed 92" grey screen and it looks pretty good. I don't have the ideal room as the walls are beige, the ceiling is white and there are a couple of small windows but it still looks surprisingly good. It's much better with the lights off. I have it mounted on my ceiling but I've been waiting for some parts and short cables to get the install done properly and perfectly align it with the screen. I'm hoping to have some time to do that this weekend.

High definition sources look really good, standard definition not so much. The PS3 sometimes doesn't like to connect properly through my receiver but that might just be a setting that needs to be changed on the Playstation.

It's my first projector and budget was a factor but I can't really complain too much with the results.

Dino Z.
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post #63 of 97 Old 01-16-2014, 04:36 PM
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EDIT: My impressions of this projector - with calibration - have totally changed. See my next response after Elix. In short, it now rocks!

 

Isn't the geometry off? Shouldn't the left most squares be rectangles? It's the test grid that comes with the projector. 

 

I don't notice it at all with actual material, so maybe it's supposed to be like that. 

 

My quick impressions:

 

I have it running 116'' with an Xbox One and I'm sitting only 118'' inches away....so it's ridiculously huge. You can definitely see pixels at this distance. It makes Xbox One games look decidedly low res, lol. Still the space level in COD: Ghosts is ridiculously awesome to play at this size and is an awesome thing to show guests. At this size though rainbows are definitively a factor since small eye movements cover a lot of screen. 

 

I'm going to try a normal person image size (80'' or so) when I get home from work.

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post #64 of 97 Old 01-17-2014, 06:33 AM
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THIS IS FIRST IMPRESSIONS ONLY. You can find some updated info in later posts.

So, I received my Optoma GT760 yesterday and played with it for several hours. What can I say, it is everything that I imagined it to be. smile.gif There aren't any photos in this post as you can see, so, sorry for that. I will do pictures when I get my DSLR back.

Contrast Well, I'm not impressed but not disappointed either. I expected it to have just about this much contrast. It is a budget DLP, however, it has the fresh DC3 720p chip and ECO+ lamp. In its best calibrated mode the blacks are milky grey. But once I put on 3D glasses the situation improved greatly and blacks didn't bother me anymore.

Colors No surprise here either. The CIE xy triangle is quite a bit smaller than standard rec709. You get under-saturation and under-luminance. I can say that colors are quite dull compared to Mitsubishi HC5 and Mitsubishi 2070B CRT monitor. But I was also prepared for it. Previously I owned now highly regarded Sharp XV-Z30000 and THAT one was a disappointment in terms of colors. Because when you expect certain things from a mid-hi-level projector and it doesn't deliver — then you get disappointed. With Optoma GT760 I knew what I will get so didn't set my expectations high. Actually, I expected colors to be worse. I will cover calibration of Optoma GT760 in later posts.

RBE Now, this aspect of DLP is very personal. There are many subjective factors (both physiological an psychological) in this area. I am not very susceptible to RBE and not distracted by it so take my comment on this matter with a grain of whatever. I am not 100% positive but is has RGBCMY 2x speed color wheel. For me RBE is visible on some occasions but it's quite feint and not distracting. I have seen Optoma GT720 — that one was a rainbow feast even for me. GT760 is quite a lot better.

Regardless of sub-par contrast and color performance Optoma GT760 is quite watchable in 2D. At least I, being a videophile perfectionist, am not repelled by the picture. And I expect that watching it for extended periods of time will make me appreciate my other projector's 2D performance even more. smile.gif

Now we move towards this PJ's strong points. smile.gif

Input lag WOW NO LAG SO TRUE biggrin.gif Yes, having a CRT projector side-by-side and moving a mouse I can't feel the difference. In this aspect, this projector is UNIQUE!!! As well as previous models, GT720 and GT750. It makes soooo much difference in gaming, especially in 3D! The absence of input lag adds much more enjoyment to gaming. For me, at least. I will do tests with DSLR later when I get it back.

Motion resolution My NVIDIA card automatically detected 720p 120 Hz mode. Testing motion resolution on this test I can clearly see details on the upper UFO. This is due to BFI-like effect in 120 Hz granting 50% less motion blur than other DLP projectors that can't output 120 Hz. This is a great asset for gaming, especially in 3D, and shouldn't be underestimated.

*to be continued*
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post #65 of 97 Old 01-19-2014, 01:06 PM
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Wow! My opinion of this projector has totally changed!

 

I found out what was causing the pixelation and rainbow issues - setting the XBox One to "RGB Full" and 36-bit color. This projector can't handle or support either - it was over-saturating and over-contrasting images (crushing blacks and colors) making creating conditions for RBE and pixels to be seen.

 

Turning the Xbox One back to RGB Limited and 24 bit color fixed the problem. The rainbows largely went away and things look largely non-pixelated and natural. 

 

I also calibrated the projector - I started with Movie mode and Eco+ and turned BrilliantColor down to 1 (the lowest setting allowable). Huge difference! Turn Brilliant Color off - this projector doesn't need it! It's bright enough as it.

 

I also set skintones to Medium and lowered the brightness and contrast ratios in line with the XBox Ones built-in image calibration tutorial. The tutorial wasn't working when I had RGB Full selected. 

 

Overall these changes had a huge effect - The T-Rex in JP on Blu-Ray (in his first scene) now has blacks on back instead of weird purply grey that Brilliant Color was causing. Skin tones look great. 

 

I'm now viewing at 116'' at 118'' inches and the screen door effect is very low. And this is a 720p projector. I can't imagine what 1080p and 4K must look like. 

 

Forza 5 is so immersive at that screen size. 

 

And Elix is right, no detectible input lag at all. 

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post #66 of 97 Old 01-24-2014, 08:17 PM
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Alternatively I found these on amazon http://www.amazon.com/Rechargeable-Dlp-link-Projector-Mitsubishi-BG-ZD301/dp/B00GHB5MA4/ref=sr_1_2?s=electronics&ie=UTF8&qid=1390618222&sr=1-2&keywords=Optoma+BG-ZD301  but I am not sure if they work the same. The description and title claims they do though.

 

Price? 22.99 a pair!!!

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post #67 of 97 Old 01-29-2014, 01:24 AM
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I wanted to post some new findings regarding this PJ. Firstly, about color and contrast. When I talked about it earlier I was watching the PJ at 120 Hz. Why does it matter? I found out that in this mode the PJ thinks it works in stereoscopic mode and activates white flash! This lowers contrast and muddens the colors considerably! When I first switched to 720p24/48/72/96 (yes, you can make these custom resolutions) I couldn't believe the improvement in contrast and colors. I went from C-- to B-. It's a pity because now I have to choose between contrast/color and motion clarity. I wonder if it's possible to deactivate white flash in 120 Hz.

Also, unfortunately, I noticed crosstalk in 3D. I use Dimensional Optics 3ACTIVE glasses. They're comfortable. I don't know if the problem lies with them or with the PJ but I do see crosstalk. I use a test pattern found here (the best pattern there is IMO). I'm going to try out different glasses as well as try setting different timings for 3D in nVidia control panel. Will keep you updated.

And on the bright side, I don't know how anybody missed it, this projector has horizontal and vertical lens shift! And a great amount of it (for such a cheap PJ). Will post pictures later.
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post #68 of 97 Old 02-07-2014, 12:19 PM
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Any idea how good the image will look if I sit 6ft away from the screen? Image size would be 80 to 100 inches.
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post #69 of 97 Old 02-07-2014, 01:59 PM
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I am sitting just 8 feet from 84" screen. At this distance I am not bothered by pixels. Add another couple of feet and it looks almost as good as 1080p smile.gif
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post #70 of 97 Old 02-26-2014, 06:35 PM
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https://www.youtube.com/watch?v=AKyI96-c1gA
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post #71 of 97 Old 02-26-2014, 06:35 PM
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post #72 of 97 Old 02-26-2014, 09:08 PM
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Meaningless video.
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post #73 of 97 Old 03-14-2014, 08:40 AM
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I am a newbie and looking at getting the GT760 as my first projector and would like to get some opinions on a screen that would be a good fit. I am looking at fixed frame because the wall is not totally flat and I won't be able to place speakers behind it so AT is not an issue. We will primary use it for movies and video games, but not in a dedicated room. There will be some ambient light (basement windows) and some lights on when the kids play Kinect, but not directly on the screen, movies will have minimal lights on.
I will most likely be a 106" screen and sitting about 12.5' away. I will be doing this on the somewhat cheap and I am currently looking at this or this from Antra

I am having a hard time deciding is should the screen be white or grey.

Thanks in advance for any input.

first post - woo hoo!
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post #74 of 97 Old 03-14-2014, 11:59 AM
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Quote:
Originally Posted by WDTV003 View Post

I am a newbie and looking at getting the GT760 as my first projector and would like to get some opinions on a screen that would be a good fit. I am looking at fixed frame because the wall is not totally flat and I won't be able to place speakers behind it so AT is not an issue. We will primary use it for movies and video games, but not in a dedicated room. There will be some ambient light (basement windows) and some lights on when the kids play Kinect, but not directly on the screen, movies will have minimal lights on.
I will most likely be a 106" screen and sitting about 12.5' away. I will be doing this on the somewhat cheap and I am currently looking at this or this from Antra

I am having a hard time deciding is should the screen be white or grey.

Thanks in advance for any input.

first post - woo hoo!

both screens you pointed out seem decent. And not really bad for the money.

I would always go with a grey screen if given the chance though. i went a completely different route with my screen. Got a massive quarter inch thick plywood board, cut it to size to accommodate a 100" diag screen while giving around a quarter inch space on all sides for the border. then got this paint kit from here .

Its practically a black paint of sorts, best to go to the site and watch the vids to see it for yourself. Its ideal being that this is a short throw projector.
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post #75 of 97 Old 03-14-2014, 01:28 PM
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Quote:
Originally Posted by Lorddeff07 View Post

i went a completely different route with my screen. Got a massive quarter inch thick plywood board, cut it to size to accommodate a 100" diag screen while giving around a quarter inch space on all sides for the border. then got this paint kit from here .

I was going to go the DIY route, and do a Beginners Delight mix. Once I priced out all the MDF, paint, rollers, edging, ect I was only about 75.00 off of a finished 106 screen, and I don't have to do any painting. With three young kids time is always a challange, and the less paint out in the open the better. smile.gif Thanks for the link though I will look at it more.
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post #76 of 97 Old 03-14-2014, 02:46 PM
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Has anybody tried this projector with a Nvidia 3D vision 2 kit?

This one is definitely on my short list.
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post #77 of 97 Old 03-15-2014, 07:31 AM
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Optoma GT760 only supports DLP Link glasses. There's no input for an IR receiver.
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post #78 of 97 Old 03-15-2014, 09:05 AM
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Quote:
Originally Posted by Elix View Post

Optoma GT760 only supports DLP Link glasses. There's no input for an IR receiver.

Thanks man.
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post #79 of 97 Old 03-25-2014, 01:46 AM
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Hi I am new to this website but im considering between buying the optoma gt760 and the Acer 6510bd. I am leaning towards the optoma but I'm wondering if I'll miss out on the 1080p. I really like the short throw feature but I was wondering if you run a test for me. If u move the optoma back further away from the wall and use the digital zoom in the menu will shrinking the size of the window somewhat close to the size you had it before you moved it back give you a more dense image or more of an HD image?
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post #80 of 97 Old 03-25-2014, 03:14 AM
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Quote:
Originally Posted by cbudz View Post

Hi I am new to this website but im considering between buying the optoma gt760 and the Acer 6510bd. I am leaning towards the optoma but I'm wondering if I'll miss out on the 1080p. I really like the short throw feature but I was wondering if you run a test for me. If u move the optoma back further away from the wall and use the digital zoom in the menu will shrinking the size of the window somewhat close to the size you had it before you moved it back give you a more dense image or more of an HD image?
Considering 720p vs. 1080p, re-read my post. 720p gaming is non-objectionable on this projector. Very small input lag certainly helps (smaller than other 1080p projectors). The further you will sit from the screen, the less noticeable the difference will be. Of course, there will still be the difference in a direct AB comparison but not as noticeable if you sit further. But I'd recommend against using digital zoom - the image will be interpolated and not as sharp anymore.

If I were to choose between this one and a 1080p DLP I might consider Optoma HD25 (not 25e) with a slight shift towards movies in mind. You gain larger resolution, better colors and RF 3D (more contrast in 3D). But you pay with more input lag and interpolated 720p60 (720p will look sharper on a native 720p projector). It's your call.
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post #81 of 97 Old 03-25-2014, 12:59 PM
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Thanks for the speedy reply Elix, and I have just a few more questions before I make my decision. I heard one of the other guys say that he was sitting about 6 feet away with the gt760 but stlll noticed some pixelation, do you experience this too? Also, please check out "projectorreviews" website on the review of the 6510BD, look at the full screens of the James Bond: Casino Royal images under "skin tones" and compare them (side to side) to the ones on the gt760 review under "picture quality 2". There are only two common images between them... the one with the close-up on his face looks more detailed on the 6510BD, but the one with the plane looks more/equally detailed on the gt760... How is that so? I have to admit that the colours on the gt760 look better though. Finally I just want to verify what you were saying about the 720p content looking better on 720p display... is that for gaming or movies? I ask because I remember having a laptop with 1080p display and running games in 720p to which it looked good, when I got a different laptop with a 720p display running these same games it was actually a sharper image, albeit a bit too sharp that on games you could see more "jaggies" (I never tested out movies, so I cant comment). So even though the 1080p display was interpolated apparently it was smoother on the edges, I always thought that was because of the finer pixels??         

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post #82 of 97 Old 03-25-2014, 09:16 PM
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Question for those who have used this Optoma GT760 in 3D mode on a PC with an Nvidia GPU. Is it using the 3D Vision driver or the 3DTV driver? I'm assuming it can be both but I hope someone has tried it with the 3D Vision driver if you are using it at 120Hz and frame sequencing 3D.

The reason I want to confirm it is I'm thinking of making an investment into a projector for gaming (mainly sim racing in iRacing) and movies. My goal one day is to do triple projector setup. I had originally thought of going with the Acer H6510BD because its 1080p native at a great price. Unfortunately I read that it only supports Nvidia 3DTV and not the Vision driver. Looks like the Acer doesn't do 120hz nor frame sequencing. That makes it a problem for a triple projector setup because the 3DTV play driver doesn't support Nvidia 3D Surround (multi-screen) from what I've read. So I started looking again at 720p projectors because I would like to have the option to do 3D in triple projectors down the road if I can save up enough money for it. I like the GT760 because of the short throw because I will be using it in a 9' x 10' room and that it has minimal input lag plus it can do 120/144 hz in 2D mode.

Thanks for any feedback.
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post #83 of 97 Old 03-25-2014, 11:52 PM
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Hi. It can't do 144 Hz in 2D. At least when I try to set a custom resolution 1280x720p144 the PJ doesn't find the signal.
I use 3DTV Play as a driver. If you can describe how one can test for 3D Vision compatibility, I'll give it a shot.

What's 120 Hz frame sequencing? Isn't it the same as 60 Hz frame-packed?
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post #84 of 97 Old 03-26-2014, 08:06 PM
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Frame Sequential and Frame Packet are 2 different standards. Frame Sequencing requires 120Hz. It alternates 60hz frames to each eye. Its the standard on the Acer 5360 and Optoma GT720 and other 720p projectors before HDMI 1.4 came out I believe.

I think for a triple projector setup for 3D I am only left with is the Optoma GT720 which was their last model to support Nvidia 3D Vision I believe. Because right now Nvidia 3DTV Play doesn't support Nvidia 3D Surround (multiple monitor/projectors) that I can find. And no telling if they ever will.

Thanks for the feedback.


http://www.best-3dtvs.com/guides/3d-format-guide/
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post #85 of 97 Old 03-27-2014, 12:42 AM
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I've seen Optoma GT720 and the rainbow effect was horrible. I'm not particularly sensitive but even for me it was intolerable.
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post #86 of 97 Old 03-27-2014, 08:06 PM
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I thought a little more about this. My goal was eventually to do a triple projector gaming rig and this or some other projector be the first one I would get. I would use it for movies and gaming while saving for other projectors. Well my wife and son love the thought of watching movies and my son gaming on a projector that when I buy one, I won't be able to just repurpose it to a gaming rig that isn't conducive to watching movies as a family smile.gif

So now the goal is to find the best projector for gaming (PC, PS4, PS3, 360) in both 2D and 3D as well as watching movies. I'll worry about the triple projector rig down the road and maybe finding a cheaper projector alternative where I can get 3.

So right now I'm leaning heavily toward the Viewsonic PJD7820HD. Its 1080p and does 2D @ 120Hz plus low to no input lag according to posts in its thread on here. And only about $100 more than the GT760. The throw isn't short but at 9' it works out almost perfect to what I want to do going by the Calculator at Projector Central. I was considering the Acer H6510BD but its at the bottom of the list now that I saw it can only do 96Hz.

GT760 is still in strong consideration though. I like the short throw and zero input lag for gaming. And in 3D it seems to work really going the posts and links in this thread. 2D 1080p @ 120Hz for gaming in particular is hard to pass up though.

Father's Day is the plan for the projector purchase so I've got time to research and think about it.
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post #87 of 97 Old 03-27-2014, 08:26 PM
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Quote:
Originally Posted by BK_NC View Post

So now the goal is to find the best projector for gaming (PC, PS4, PS3, 360) in both 2D and 3D as well as watching movies.
Part of the reason I bought this projector is for the gaming and my kids. They are younger but love the kinect games. With the short throw they can stand and play the games and not block the image. The other reasons are all the same as yours, multi purpose. The 3d is pretty decent as well. I've only had it a week but so far I am pretty happy with it.
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post #88 of 97 Old 03-29-2014, 01:58 PM
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Has anyone moved from a 1080p projector to this 720p one? I know as you get further away from a screen the perceivable difference in the 2 resolutions grows smaller to non-existent. My eyes will be about 9' from the screen. It's the only option I have for it. I'm thinking that is so close for a 84" to 106" (the size range I'm thinking of) screen that there would be a big perceivable difference between 720p and 1080p in 2D. Short throw is very appealing though.
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post #89 of 97 Old 03-29-2014, 03:54 PM
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I use this projector with a 1080p projector on a daily basis. I have a 84" screen and from around 7' onwards I'm not bothered by pixelation or lack of resolution. You get used to it if you watch it daily. The contrast isn't horrible (I measured around 2000:1 in Eco+ lamp mode). The colors aren't something to write home about. But I think I already wrote all that.

Really, for this price this projector is great. Maybe not best bang for the buck but it serves its purpose (3D gaming, yay!).
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post #90 of 97 Old 05-12-2014, 02:43 PM
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I did some sharpness "tests" out of fun. Just to prove my point I earlier that a 720p projector is better for 720p native content (most PS3 games, for example) than a 1080p projector. It is better to view these images in separate tabs.

In the first set of images I'm comparing an Optoma GT760 ultra-short throw 720p DLP projector to a high-end Planar PD8150 1080p projector.

Optoma GT760 on a 720p image close-up: http://imgur.com/nPrJj5i
Except for some minor chromatic aberrations, a very sharp image!

Now, Planar PD8150 on a 720p image close-up: http://imgur.com/mT70KjL
You can obviously see interpolation effects here. Disregard chromatic aberrations... It is so much more pronounced on photos. Must be the camera lens is adding some of its own. And I took the photo off-center where CA performance is less stellar.

Funny how I have to defend a 7000$ PJ vs. a 600$ PJ, huh? biggrin.gif
And for the sake of justice I'll feed both projectors the same picture with 1080p signal.

Optoma GT760 on a 1080p image close-up: http://imgur.com/e3zHZAO

Planar PD8150 on a 1080p image close-up: http://imgur.com/qWL2RGw
You can still see aberrations on the picture while the eye barely sees them from a distance of a reached-out hand.

Planar PD8150 is the sharpest 1080p projector I've seen. And yet for 720p content a native 720p projector will be sharper.
Elix is offline  
Reply Digital Projectors - Under $3,000 USD MSRP

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