Hi friends I will choose between optoma hd39hdr and gt1080hdr. Do you think there may be a difference in image quality between the brightness of the light and the difference between the devices I have specified different features of? My room can be in an arrangement that can accommodate 2 products. My screen will be 3.45 Diagonal. My viewing distance with my screen is between 3.80m and 4.0m! The most important reason I want to choose these products is the ability to play games in Full HD 120HZ. Also Which color should I use on my wall? Matt White or Contrast Gray? Mainly used for Football Game and Netflix

I'm waiting for your help with the election.

Thanks friends

HD39HDR GT1080HDR
Projection Lens F=2.43–2.78; F=21.6 F2.8; f=7.42, fixed lens
Brightness 4,000 ANSI lumens 3,800 ANSI lumens
Display Technology TI 0.65” 1080p DMD Single Texas Instruments 0.65” 1080p DMD

I forgot to write. The GT1080HDR, which is a Short Throw, says Single 0.65. Is the HD39HDR dual with 0.65 Chip? Are chips important?

@Alper AYKUT Don't mind the chips.

The difference between the two is throw ratio. Throw ratio is the distance the projector can be placed from the screen.
The HD39HDR throw range is 1.12 – 1.47:1.
GT1080HDR has 0.50:1.

Throw range x1.12-1.47 means the projector can be placed from a minimum of x1.12 image width to x1.47 image width - from the screen.
0.50 means it's distance is fixed to x0.5 (half) of the screen width.

A screen with a diagonal of 345cm is 135" diagonal, in 16:9 format. The width is ~300cm.
http://screen-size.info/

This website can be used for precise calculations. More projector models can selected from the top of the page.
https://www.projectorcentral.com/Opt...ulator-pro.htm


So the question is from what distance can the projector be mounted?
What are the room dimensions?
Is there going to be any ambient light in the room?
Any video games are going to be played? On what platform? What type?


Depending on the budget 4K projectors are available that can do 1080p in 120Hz.


Regarding the screen, do you want to buy a white/grey screen or want to paint a wall?

what distance can the projector be mounted?

Hi I'm going to mount the ceiling around 3.85m Meters.

What are the room dimensions?

My project will reflect the screen between 3.85m room 13 square meters


Is there going to be any ambient light in the room?

I plan to use a dim light. The environment will not be too dark. Could be a standing lamp.

Any video games are going to be played? On what platform? What type?

Mainly PES 2020, Forza Horizon, I don't play a lot of games except for it. Other than that, watch Netflix. PC platform will be.


Actually 1080p 120hz is very nice but I wish I had a Projector that could do 2k 120hz and above
My budget is $ 800


Regarding the screen, do you want to buy a white/grey screen or want to paint a wall?
I'm not thinking about the curtain. My goal is to solve it with Paint but which paint should use which color? I am not sure ?

Thank you for answer my friend.

I don't think there are any projectors that can do 120Hz at more than 1080p

What are the room dimensions, meaning length, width, and height?

Don't understand. What about the curtain?

Do you want to paint a wall to use as a screen or buy a separate screen?
Or to paint the walls of the room, that will not be used to project the image?

Lenght : 4 meter
width : 4 meter
height : 2,80 meter


I do not want to use projection screen (elite screen, etc.).

i want to paint a wall to

But Which Color ?


My English is not very good. I'm doing google translation.

thank you.

White matte paint can work.
Grey matte paint can work as well. It will give better contrast, but dim the image a bit. If it's a problem it depends on the size of the screen. Mounting the projector closer will help with brightness.
The grey paint needs to be neutral. I don't know what brands there are locally.
There is a sub forum for DIY paints:
https://www.avsforum.com/forum/110-diy-screen-section/



When mounting the projector the dimensions needs to be taken into consideration:
Dimensions (Widh x Height x Depth) 12.4(W) x 9.5 (D) x 4.5(H) inches
In cm it is: 31.49cm (W) x 24.13cm (D) x 11.43 (H)

Plus space from the cables at the back, 10-15cm.
Use this calculator:
https://www.projectorcentral.com/Opt...ulator-pro.htm

Is it enough to hang 30cm from the ceiling? If I take the Optoma short shot, the GT1080HDR is projected on a 1.55m diagonal display from 1.5 meters. There is a lumen difference between HD39HDR and HD39HDR 4000 lumen GT1080 3800 lumen

If I take the short-throw, would it be more accurate to use gray matte paint?

Thankyou.

The GT1080HDR is probably going to be more bright because it's closer.
It can do an 135" screen from 149cm.
https://www.projectorcentral.com/Opt...ulator-pro.htm

Specifications:
https://www.optoma.com/us/product/gt1080hdr/

This projector has:
Offset 116% ±5%

This means that the top of the visible part of the screen will be 16% (of the height of the screen) below the center of the lens.
For an 135" screen in 16:9 format the height is 168.1cm. 16% is 26.89cm. (http://screen-size.info/)

In the image below, the offset is where it says 27cm above the screen. This is for 135" screen. If the screen is another dimension then the offset will be different.






The entire wall can be painted so you can have the liberty to choose the size desired.

Attached Thumbnails

 

As a general rule, eye level needs to be about 1/3rd from the bottom of the screen.
The average height of the human eye level is 50 inches (127cm) seated and 60 inches (152.4cm) standing.




As an example:
The room is 280cm high. 135" screen height is 168.1cm. 1/3rd is 56cm.
Human eye level seated 127cm.
127-56=71cm This is where the screen would start.
71+168.1=239.1‬cm This is the top of the screen.
239.1+26.89 (16% offset)=265.99cm This is the center of the lens.

Projector height is 11.43cm. Center of lens is half, so ~6cm.

265.99+6=271.99cm
280-271.99=8.01cm

This is the distance from ceiling to top of the projector.

If you cannot find a mount this thin the screen can be lowered.

Thank you for information my friend.

A couple of screenshots using the HD39HDR.... Alita: Battle Angel 1080p .... With PJ set to HDR SIM

This PJ is growing on me in a major way. It took me some time to become more acquainted with the settings and how they work. However it's been about a month of tweaking & I am really enjoying the HDR features of the PJ.... Even at a native 1080p, the HDR adds such an additional pop to the image.

It can display a native HDR image or it can simulate an HDR image using the included settings.

Ideally I'd like to go 4K for my Theater Room (just as I have for all other normal displays in the house), but not until they sort out the input lag issues.

Attached Thumbnails

   

Some Epsons have 20-30ms lag with 4K.

How is everyone who bought the hd39hdr liking it so far? I'm on the fence about buying one of these to use till the 5050ub refurbs come out. Pro's, cons? Any bugs? Tuan, what about the new fw that's supposed to be coming?

I received my HD39HDR on Monday and played around with the settings for a few hours. Just for reference and the only projector I can compare it to is an Optoma 141x in a dedicated/light controlled room projecting 100” from 10’8” going through an Onkyo 646. We are about 80% gaming (Xbox one x), 10% sports (DIrecTV Sunday Ticket) and 10% movies mostly streamed from Amazon/Disney+/HBO.

So far I’m very pleased with the projector. The low input lag and 120hz has been a very smooth and enjoyable experience playing games so far. Perhaps it’s placebo but it certainly feels better. The projector is much quieter than I anticipated while running in Eco+ mode and doesn’t seem to run hot. I’ve had a couple of handshake issues but they’ve mostly work themselves out.

My biggest issue so far with the settings is I cannot get the “closed eye” to show up in the Xbox calibration settings. I’ve read that setting both the Xbox and projector to Full RGB or both to Limited is best however, I’m getting the more appealing picture when setting the Xbox to Standard (Limited) and the projector to RGB 0-255 (Full). I don’t know why.

I’ve got about 6 hrs of gaming in using the 1080p 120hz enhanced gaming mode. This is a huge improvement over the 141x and even feels snappier than playing on my Samsung KS9000. I was not able to get 1080p60 with HDR working properly. When enabling the “Allow 4K” option in the Xbox the projector automatically switches to HDR 3840x2160 @ 60hz even though the Xbox is set to display at 1080p60 with HDR enabled. When the projector switches it takes you out of game mode then has a 33ms input lag which starts to feel a little laggy in multiplayer games.

I’ve watched 3 episodes of The Mandalorian, Thursday Night Football and an episode of Jack Ryan. The Mandalorian and Jack Ryan were both viewed using the Cinema default settings with HDR. Since most of my time has been in 1080p game mode without HDR and I have not dialed in the HDR settings yet. Honestly for the price of the unit I’m not expecting HDR miracles. I will say everything I’ve viewed so far is a noticeable improvement over the 141x. I plan to test a few UHD disks over the next few days.

I’m waiting for a call back from Optoma regarding the 1080p60HDR (firmware?) not displaying properly. I know there are better projectors available for movie watching for a little more money but the gaming features were too important for my situation and in that area I’m pretty happy.