Looking for Screen Paint Solution

[mechman]

Harp,

What's really interesting to me is the big difference in a and b values for each. But yeah the curves are somewhat similar.

mech

[cynical2]

Panny82 wrote:

I got a 2 tracking numbers one for the mount the other for the projector. They left the same place at the same time going to the same place. But only one came today the mount. I go another question for someone. I am trying to figure out wheir I am going to put the projector. I wondering is it best to use as little of zoom as possiable. I have about a 35 foot room so I have alot of room to work with. How close do you guys think I should mount it. Here is a link of a project calculator that calculates fL also for my projector. Let me know if you guys think this is lagit, thanks.

http://www.projectorcentral.com/Pana...ulator-pro.htm

The rule of thumb for a projector with adjustable zoom (like yours), when projecting the same sized image from different distances: The closer you mount it to the screen, the brighter the image...the further away that you mount the screen, the better the contrast ratio.

I can't comment directly on how much difference it really makes...but that is the rule of thumb (at least as I understand things).

I would strongly encourage you to set up something temporary (I have a bookcase that I emptied and moved it to different locations) that you can sit the projector on and view the resulting image. Don't be in a hurry to get the ceiling mount permanently affixed...take the time to study your options (and you have lots of options given your room size).

Try the Kilz for a while, try different screen sizes, sit in the front and back row to make sure the screen is appropriately sized for all seating positions, move the projector towards and away from the screen, etc.

If you take the time to try your options out first, before mounting anything permanently, you'll KNOW that you've done things the best you know how. Otherwise, if you just pick a screen size, paint color, and mounting location based on what you know now (in the absence of the actual equipment and any real data)...you'll always wonder..."I wonder if it would look better if I had minimized (or maximized) the zoom when I mounted the pj." Eliminate those "I wonder if"s by trying lots of different scenarios before nailing things down (literally).

Personally, as far as distance from the screen, I ended up somewhere in between the min and max allowable zoom for my screen size. That enables me to go up or down a bit in screen size (should I later wish to do so), while compromising on the brightness/contrast ratio question.

BTW, sorry your pj is "misplaced"...that stinks! Don't you wish they'd lost the ceiling mount? Never seems to work that way...

As far as the pjcentral calculator is concerned, to my knowledge it's perfectly legit. But, they obviously make some assumptions in their model. Compared to my own calculations, their calculated light level at the screen was a bit low. They probably use lower lumen output than what they measure "out of the box" to account for aging of the bulb. In my calculations, I used the "real lumens" that they reported in their review of my pj, rather than the manufacturer's claimed output, so I know that didn't cause the discrepancy (in case anyone is wondering).

[wbassett]

cynical2 wrote:

As far as the pjcentral calculator is concerned, to my knowledge it's perfectly legit. But, they obviously make some assumptions in their model. Compared to my own calculations, their calculated light level at the screen was a bit low. They probably use lower lumen output than what they measure "out of the box" to account for aging of the bulb. In my calculations, I used the "real lumens" that they reported in their review of my pj, rather than the manufacturer's claimed output, so I know that didn't cause the discrepancy (in case anyone is wondering).

Jim it is low, remember I talked to them about it and they explained it takes into consideration an aged bulb, not end of life but not brand new either. You can add 20-25% to their values. I have the exact amount but have to look it up, but I think that's close.

[cynical2]

wbassett wrote:

Jim it is low, remember I talked to them about it and they explained it takes into consideration an aged bulb, not end of life but not brand new either. You can add 20-25% to their values. I have the exact amount but have to look it up, but I think that's close.

Yep, that's about what I got, as I recall...20-25% difference. Sorry I didn't remember you talked to them (I do remember it, now)...in the depths of my mind, that's probably where I got the correct idea that the difference was from them accounting for light reduction due to bulb age.

Man, I was hoping I was smart for a second there...instead, I was just subconsciously regurgitating info you already knew.

[Panny82]

Its a good day got my paint up 4 coats and got my projector a couple hours ago. It is killing me not to be able to set it up right now. I have to finish cutting up my deer before I start with the projector. I will keep you guys updated after I give her a try.

[cynical2]

Panny82 wrote:

Its a good day got my paint up 4 coats and got my projector a couple hours ago. It is killing me not to be able to set it up right now. I have to finish cutting up my deer before I start with the projector. I will keep you guys updated after I give her a try.

Sounds like you and mech should get together...

Minnesota...
Hunting...
Gutting deer...
Projectors...
DIY screens...

Y'all could be best buds!

[mechman]

I expect some sausage!!

mech

[cynical2]

mechman wrote:

I expect some sausage!!

mech

[Panny82]

I watched a couple movies with it last night and was not real impressed till I messed with the settings. I watched Flushed away with the boy witch is a animated movie and then watched Mr. Brooks with my wife. I found the colors of the projector to be dull out of the box. I don't know if it was the projector or the screen making them appear that way. So I put my calibration dvd in (Avia2) and calibrated the contrast and brightness. Which helped alot. Next I wanted to calibrate the colors (RGB) but I could not find anywhere on the disk that I could do that. All I found was differnt pictures of color, so I ended up calibrating to one of them. I then found the image to have that pop per say. I am also wondering on the title screen of some dvds they are very pixely and my white lettering is sorta blur and pixely. Any ideas on this? As for the blacks a thought they were ok and the whites where almost to bright sometimes. But like I said above I am not sure what is all entailed in calibrating one. Could someone please let me know.

Thanks
Mike

[mechman]

Mike,

Where are you at in Minny? By the title screen do you mean the player generated text or text on the actual DVD? Is it a upconverting DVD player? I'm going to go back now and read what's transpired up till now just to get back up to speed.

mech

[Panny82]

I live in Lake City Minnesota. It only the text like on the main title page for dvd's. I just have a cheap DVD player I am using now with a video rca. Probably the worste connection I could be using. I just picked up a s-video cable becasue I hear they are a little better than rca. Let me know what you guys think to use to get my colors calibrated.

[mechman]

Well resolution wise I'd guess it's because of the signal. Color wise, the best anyone can do without getting a professional calibration done is the Avia and the DVE dvds. I know that I had found someone on AVS that had theirs professionally done with a setup similar to mine and I had just used their settings and it worked fine. I think Jim (cynical2) has done something similar. But that really is luck more than anything else - I know Leonard (lcaillo) shudders when folks say these types of things!

So in summary, outside of the Avia and DVE, you're looking at a professional calibration. I'm slowly learning the ins and outs of this though as I do have a spectrophotometer. If I ever get it down I'd be happy to come down and attempt it for you. But I don't want to wreck anyone else's $$$$ projector.

mech

[Panny82]

I hooked my computer up to it today and used the VGA hook up instead of the rca. All I can say is wow that really made a big diffrence. I also used a program that came with my video card to calibrate the RGB gamma and that helped alot also. I pretty happy with the Kilz2 white, but I think I want to try a light grey to make sure I am not cutting myself short. Any suggestions you guys think i should try first. I think I am going to just try some panels and hang them on the screen so i have a side by side view. Let em know what you guys think. Thanks Mike. Mech where do you live in MN?

[cynical2]

Good news, Stryker!

Can you describe the program you used to adjust individual colors/gamma values? What exactly is the procedure?

Thanks, Jim

[Panny82]

It is made by nvidia but I know ATI makes one too. All it does is make you match the RGB untill the color by it blends together. Pretty easy and helped.

[mechman]

Panny82 wrote:

I hooked my computer up to it today and used the VGA hook up instead of the rca. All I can say is wow that really made a big diffrence. I also used a program that came with my video card to calibrate the RGB gamma and that helped alot also. I pretty happy with the Kilz2 white, but I think I want to try a light grey to make sure I am not cutting myself short. Any suggestions you guys think i should try first. I think I am going to just try some panels and hang them on the screen so i have a side by side view. Let em know what you guys think. Thanks Mike. Mech where do you live in MN?

Empire Township.

mech