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post #181 of 2476 Old 09-19-2006, 03:12 PM
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Can anyone see if there is any gaming lag with the resolution set to 720p?

I will test with my HTPC when I test the 720p apple movie trailers.
EDIT: I just realized... you didn't specify PC gaming, console gaming, which console, etc. I will test with a PC at 1280x720. I know with my PS2 on the H27 it was great. I am expecting the same performance with the 720p resolution with the HD70. I will post when I try.

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Originally Posted by cyberheater View Post

Has anyone got confirmation on the offset on this projector? Ta.

my calculations based on the UK Optoma HD70 PDF Manual specs gave a result of 40%, though I was told 33% via email from Optoma. I have again asked them about my calculations, so we will see. I am also getting the Projector when I get home tonight. And then I will do some of my own testing and post some more info.
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post #182 of 2476 Old 09-19-2006, 03:19 PM - Thread Starter
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Thanks. I'm going to be getting this PJ as well but need to know if it will fit in my tv room.

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Originally Posted by xenon2000 View Post

my calculations based on the UK Optoma HD70 PDF Manual specs gave a result of 40%, though I was told 33% via email from Optoma. I have again asked them about my calculations, so we will see. I am also getting the Projector when I get home tonight. And then I will do some of my own testing and post some more info.

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post #183 of 2476 Old 09-19-2006, 03:44 PM
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Quote:
Originally Posted by xenon2000 View Post

I will test with my HTPC when I test the 720p apple movie trailers.
EDIT: I just realized... you didn't specify PC gaming, console gaming, which console, etc. I will test with a PC at 1280x720. I know with my PS2 on the H27 it was great. I am expecting the same performance with the 720p resolution with the HD70. I will post when I try.



my calculations based on the UK Optoma HD70 PDF Manual specs gave a result of 40%, though I was told 33% via email from Optoma. I have again asked them about my calculations, so we will see. I am also getting the Projector when I get home tonight. And then I will do some of my own testing and post some more info.

Sorry, PC gaming only. Thx!!!!
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post #184 of 2476 Old 09-19-2006, 04:18 PM
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Quote:
Originally Posted by xenon2000 View Post

I tried the 4805 back when it was $1400 and was not happy with the loud fan or the exaggerated rainbows

You saw rainbows on the 4805? Interesting...my understanding is that rainbows are a product of DLP colorwheel technology. Since the H70 is DLP, you could see rainbows, whereas the LCD 4805 is LCD = no rainbows...

my 2 cents

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post #185 of 2476 Old 09-19-2006, 04:23 PM
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I just took some pics of my PC desktop at a 720p resolution over component cables, and I can actually read text pretty easily on my 4805. I also took some shots of HL2. Can anyone with the HD70 take a picture of a website (like a forum or something with lots of text) so that I can compare? Thx!
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post #186 of 2476 Old 09-19-2006, 04:33 PM
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Quote:
Originally Posted by 4 rubBeR View Post

You saw rainbows on the 4805? Interesting...my understanding is that rainbows are a product of DLP colorwheel technology. Since the H70 is DLP, you could see rainbows, whereas the LCD 4805 is LCD = no rainbows...
G

Your Infocus ScreenPlay 4805 is LCD? That's odd, when I had it, it was a single DLP projector using the exact same Darkchip2 DLP chip as the Optoma H27.

And yes, rainbows are the artifact of DLP. I notice rainbows on ALL the 4x speed color wheel DLP projectors I have ever seen. I was only stating that the 4805 for some reason had the effect much more to me compared to the H27. Even though they both have Darkchip2 4x speed 6-segment color wheels. With the 4805 the rainbows were so bad for me with dark scenes such as in Master and Commander, that combined with the loud fan noise, I just had to return it.

Where as with the H27, the fan is so quiet I never noticed it. And the rainbow effect was about half as noticeable as it was on the 4805 to me. Dark details are also much much better on the H27 over the 4805 using the same chip. It must be the image processing that is so much better on the H27 over the 4805.

But yes... all SINGLE chip DLP projectors have a color wheel and hence the rainbow effect. 3 chip DLP is like LCD and so it does not.

If you are not talking about the Infocus ScreenPlay 4805 (which is DLP), then my comments about the HD70 being so much better is invalid and I do not know anything about the projector you speak of.
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post #187 of 2476 Old 09-19-2006, 04:40 PM
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Quote:
Originally Posted by 4 rubBeR View Post

You saw rainbows on the 4805? Interesting...my understanding is that rainbows are a product of DLP colorwheel technology. Since the H70 is DLP, you could see rainbows, whereas the LCD 4805 is LCD = no rainbows...

my 2 cents

G

You must be confusing the SP4805 with the SP5000 LCD. The 4805 is DLP and I have seen rainbows (when I choose to or if I dart my eyes quickly).
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post #188 of 2476 Old 09-19-2006, 05:01 PM
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Rainbows make themselves known in 3 areas:

1) If your eyes are fatigued...say you're watching a movie at 2am and you're starting to nod off, you'll notice rainbows more.

2) If you're too close to the screen. This makes perfect sense because the closer you are to the screen, the more your eyes have to travel to follow the action.

3) If your DLP player has a slow color wheel

For the record, I've seen a "rainbow-like" Phenominia when looking at my CRT RPTV as well...which I was amused by...got up kinda close and darted my eyes around....rainbows, or something very similar. Probably just an intense light still fading from my retinas or something like that.

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post #189 of 2476 Old 09-19-2006, 06:29 PM
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Quote:
Originally Posted by MTyson View Post

You must be confusing the SP4805 with the SP5000 LCD. The 4805 is DLP and I have seen rainbows (when I choose to or if I dart my eyes quickly).

My bad. Yes I looked at it too quickly and saw SP5000.

FWIW, my H30 has minimal RBE; DPL shouldn't be a deterent to anyone who is thinking of converting from, say a Z2.

Talk about eye fatique

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post #190 of 2476 Old 09-19-2006, 06:42 PM
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Quote:


If you're too close to the screen. This makes perfect sense because the closer you are to the screen, the more your eyes have to travel to follow the action

Problem is most people buy pj's in order to get a theater-like image, i.e usually under 2 screen widths, which is extremely close.
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post #191 of 2476 Old 09-19-2006, 08:36 PM
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EDIT: I measured the offset again for a 98" screen at 11.5 feet away. And got an offset of 30%.... So I don't know at all how the review site got 33%. Maybe there is a default distance that this type of measurement gives a useful result. Either way, I love the projector and the picture. But after trying to hold it up to the ceiling... for no keystoning and a huge 100+ inch screen, it gets way too close to the ground with a big top gap.... Though I noticed only a tiny amount of keystoning if I centered it on the wall. Small enough that I wouldn't mind not squaring it off on a non-bordered screen. But I will probably reduce the screen size to about 92" so I can have a square picture with a ceiling flush mount at 7.5 feet.

Wow, I really love this projector. Great looking case and all. Glossy white.

With the kids and all, don't have time tonight to post images. But I will post something tomorrow for sure.

Wow, wow on the resolution. The 1280x720 really makes a difference over 854x480. So far I have only tried using my HTPC set at 1280x720 @ 75Hz. Looks increadible. I only have it projecting on my blank satin white wall, and it looks great.

Now for a simple test I did for the offset.

Set the projector lens at 100" from the screen. Lens centerline to bottom of image is 8.5" and the image is 35.5" tall. Which makes the offset only 24% ! That's great! I will double check my measurements again, but I can't be more than 1% off, I measured to the closest .25 inch. And did the projector lens at 100" from the wall to make it easy.

Here's the math: Reference any projector PDF manual for geometry terms.

projector on table.
100" from middle of lens to wall
18.5" from middle of lens to floor
27" from floor to bottom of image
35.5" image height

27 - 18.5 = 8.5" (equals lens centerline to bottom of image = H1)

So:
L = 100"
H = 35.5"
H1 = 8.5"

Now L doesn't matter for this reverse test. I will test the projector at another distance and the % should be within 1% of my first test.

H1 / H = Offset %
8.5 / 35.5 = 0.239 or 23.9%

So I am not sure how the projector review site measured 33% and how the HD70 PDF online math comes out to 40%... but I measured it and came up with 24%. I will triple check again tonight if I can. But it's going to work great for me and my 7.5" ceiling. Now it's just a matter of deciding how big to go without the image bottom being too low and not hitting the crown molding either.
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post #192 of 2476 Old 09-19-2006, 10:00 PM
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The calculator states that from a 12.5' throw distance, I will have to use the ZOOM at 1.17x to get a 106" image.... does this type of zoom degrade the image in any way or cause you to lose any area of the picture??
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post #193 of 2476 Old 09-19-2006, 10:09 PM
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Quote:
Originally Posted by tattootearz View Post

The calculator states that from a 12.5' throw distance, I will have to use the ZOOM at 1.17x to get a 106" image.... does this type of zoom degrade the image in any way or cause you to lose any area of the picture??

Nope. The zoom is purely optical and there is no degrading of the image. Only when you use the Digital Keystone corrections.
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post #194 of 2476 Old 09-19-2006, 10:28 PM
 
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Thanks Xenon2000! A very pertinent report and well done.
And I like the message. Sounds like the right upgrade for me.

Enjoy!
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post #195 of 2476 Old 09-19-2006, 10:29 PM
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xenon2000, I am finding wildly different throw results from the Projector Central calculator and the Optoma UK calculator. Could you clear up the mystery? What size diagonal image can the HD70 throw from 10.5 and 11 feet at mazimum zoom? I would so greatly appreciate it if you could solve this mystery. PC says 96 and Optoma UK says 82 both at mazimum zoom.

Thanks!

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post #196 of 2476 Old 09-19-2006, 10:36 PM
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Quote:
Originally Posted by docprego View Post

xenon2000, I am finding wildly different throw results from the Projector Central calculator and the Optoma UK calculator. Could you clear up the mystery? What size diagonal image can the HD70 throw from 10.5 and 11 feet at mazimum zoom? I would so greatly appreciate it if you could solve this mystery. PC says 96 and Optoma UK says 82 both at mazimum zoom.

Thanks!

Doing this before work now.

11.0' away = 95" diag at full zoom.
11.0' away = 80" diag at min zoom.
10.5' away = 86.5" diag at full zoom.
10.5' away = 73.5" diag at min zoom.

Hope this helps you.
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post #197 of 2476 Old 09-19-2006, 10:54 PM
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That is terrific, thank you so very much!

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post #198 of 2476 Old 09-20-2006, 06:59 AM
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anybody used this PJ on the xbox360 , if so how is the quality on the VGA cable and maybe u can post some pics pliz
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post #199 of 2476 Old 09-20-2006, 07:16 AM
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Quote:
Originally Posted by phatsua View Post

anybody used this PJ on the xbox360 , if so how is the quality on the VGA cable and maybe u can post some pics pliz

I use the HTPC on the VGA cable set at 1280x720 @ 72Hz, looks incredible. PC gaming looks great. Now if you have a VGA cable for your Xbox360 and can choose exactly 1280x720, then you will also have perfect results. You should be able to choose 1280x720 since that is the HDTV 720p resolution exactly. I don't have a xbox360 to test with.
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post #200 of 2476 Old 09-20-2006, 07:34 AM
 
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Im ready to go with this sucker, show up to costco you bastard of a projector!
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post #201 of 2476 Old 09-20-2006, 07:34 AM
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Anyone know when Costco.ca will be carrying the HD70....I heard at the end of this month but not sure how much truth there is to that. I assume they will offer it in the same package with the 90 inch screen. I'm guessing the price will be around $1499.99.
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post #202 of 2476 Old 09-20-2006, 08:16 AM
 
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Originally Posted by blitz6speed View Post

Im ready to go with this sucker, show up to costco you bastard of a projector!

Everyone should write to Costco.com (There's a place to "contact us" on the website) and tell them of your keen interest in the HD70. I did!

And another thanks to Xenon2000 for all the info. Your reply to docprego confirms how well this PJ will fit in my HT. And it sounds like my HTPC will do well with this movie machine as well. Super!
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post #203 of 2476 Old 09-20-2006, 08:18 AM
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I currently have my 4805 at 14.2' from a 92" diag. screen (22 FTL). I have been thinking of going to a larger screen (106/110/120). When I use the Screen calculator (P.C.) for the HD70, leaving the universal ceiling mount at the 14.2' mark (Really can't move it except for maybe 6" back and 8 inches forward due to air duct and ceiling fan I installed) the calc. shows a 106" diag image but at less lumens (Only 11FTL for the HD70) than my 4805 (vs 17 FTL).

I know IF calibrates colors (D6500) very well and when posting lumens they are very accurate also in using the ANSI std. Is that the case here, I thought the HD70 was a bright PJ?
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post #204 of 2476 Old 09-20-2006, 08:41 AM
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I wonder if the HD70 would work for me? I have a 7.5' ceiling & a 106" screen from a 14' seating distance. I can do a ceiling mount, back wall rack, coffee table or even a floor placement (under the coffee table). The offset is what I'm worried may rule out this projector for me.

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post #205 of 2476 Old 09-20-2006, 08:57 AM
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Quote:
Originally Posted by speed32219 View Post

I currently have my 4805 at 14.2' from a 92" diag. screen (22 FTL). I have been thinking of going to a larger screen (106/110/120). When I use the Screen calculator (P.C.) for the HD70, leaving the universal ceiling mount at the 14.2' mark (Really can't move it except for maybe 6" back and 8 inches forward due to air duct and ceiling fan I installed) the calc. shows a 106" diag image but at less lumens (Only 11FTL for the HD70) than my 4805 (vs 17 FTL).

I know IF calibrates colors (D6500) very well and when posting lumens they are very accurate also in using the ANSI std. Is that the case here, I thought the HD70 was a bright PJ?

First, the lumens. I am not sure how they rated the Infocus ScreenPlay 4805 at a higher FTL than the HD70 at the same distance. The 4805 is only 750 lumens vs the 1000 lumens of the HD70. I don't have any lumen test equipment, but even at 120" in a totally dark room it's plenty bright enough in the lowest light setting. (No AI and non bright mode). And I have had the Infocus SP 4805 in this same room and the HD70 is brighter. Without having them both at the same time, I would say the lowest setting on the HD70 is probably slightly brighter than the 4805 at it's brightest setting. Also, fan noise in either mode is much quieter on the HD70 than the 4805. Also the 1280x720 res is such a HUGE difference over 854x480. I didn't think it would be, but in person it's an amazing difference.

There is no competition between the Infocus Screenplay 4805 and the Optoma HD70. It's a no brainer upgrade. It's brigher, way more resolution, has HDMI, better color, less noise.

As far as your existing mount. Since the HD70 has much different offset and projection values than the 4805, it will most likely not work for you in the same spot. Sure you can have a different screen size, that is ok... but the offset value will most likely put your image too low if you want zero digital keystoning. (which you don't want to keystone and lose any of your 1280x720 HD picture. )

Heck, the Costco cheap Optoma H27 with 92" Screen for $750 shipped is also a better projector than the Infocus SP4805. It's got the same DLP chip and color wheel, but it's slightly brigher and much much quieter than the 4805. As long as you can find a solution for it's huge offset value, it's also better than the 4805. But if you already own a 4805, I would get the HD70 as the upgrade, resolution alone will blow you away. I can't say this enough, I really didn't think the res would be all that different. But it really is a huge difference that you can see.
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post #206 of 2476 Old 09-20-2006, 09:02 AM
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You could probably make the HD70 fit ok. If a ceiling mount puts the screen to low for you you can do the flat on the floor setup. At 14' it will have to be back by the wall. The ceiling mount without keystone will put the 106" screen 13" up from the floor.

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post #207 of 2476 Old 09-20-2006, 09:09 AM
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Quote:
Originally Posted by Brajesh View Post

I wonder if the HD70 would work for me? I have a 7.5' ceiling & a 106" screen from a 14' seating distance. I can do a ceiling mount, back wall rack, coffee table or even a floor placement (under the coffee table). The offset is what I'm worried may rule out this projector for me.

I have a very similar setup to you. I have an 18' x 12.5' room with a 7.5 foot ceiling. Currently my seating is 2 sofas... 1 on the back wall putting it at a 16' viewing distance and the other against the left wall (looking at the screen) so the 2 sofas are in an L shape, this puts those viewers 16' to 10' from the screen. With a coffee table in the middle for the sofas. Testing the projecting just sitting on that coffee table I easily get a 100-110" screen that is about 6" - 10" from the ceiling.

I want to do a ceiling mount and the offset seems to be about 24-30% from my actual measurements... though online it says 33% and math using the HD70 PDf manual specs gives me 40%. In actualy use I have not been able to see anything near 40%.

So if a coffee table setup will work for you, I can tell you right now it works perfectly with a 7.5' ceiling. I have my coffee table setup currently at around 13.5 or 14', can't remember now and at work right now. And have about a 103" screen area on the wall. Works great and used my previous H27 that way as well the whole time. But with my small kids now, I am going to try hard to ceiling mount it with zero keystoning.
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post #208 of 2476 Old 09-20-2006, 09:11 AM
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Quote:
Originally Posted by guitarman View Post

You could probably make the HD70 fit ok. If a ceiling mount puts the screen to low for you you can do the flat on the floor setup. At 14' it will have to be back by the wall. The ceiling mount without keystone will put the 106" screen 13" up from the floor.

How did you come up with 13" for the bottom of a 106" diag image for the HD70 and a 7.5' ceiling?

I have the HD70 in my room right now and I held the projector against the ceiling and I didn't have a 2nd person to measure, but I thought it was less than 13" with zero keystoning. So curious how you got that number.
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post #209 of 2476 Old 09-20-2006, 09:17 AM
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Quote:
Originally Posted by xenon2000 View Post

But if you already own a 4805, I would get the HD70 as the upgrade, resolution alone will blow you away. I can't say this enough, I really didn't think the res would be all that different. But it really is a huge difference that you can see.

Thanks for all the info you are providing. As SP4805 owner, I wonder how much of an upgrade you are talking about for someone whose viewing habit is 90% SD DVD, 10% HD DVD and no HDTV? One would think and some has suggested that a pixel mapped SD DVD would look better on the SP4805 than on 720p machine since the native resolution of DVDs is 480? What is your take of SD DVD PQ on the HD70 vs. 4805? thanks.

I want to hear opinions from people who don't have a dog in the fight.
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post #210 of 2476 Old 09-20-2006, 09:21 AM
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Thanks Tom & xenon2000. I'm looking to the HD70 to replace my Panny AE700U. Always wanted to go DLP. Should hold me over nicely until 1080p prices drop.

Do online retailers like ProjectorPeople & VisualApex allow a grace period to try out projectors? Since the HD70 has a big offset & no lens shift, it's hard to be absolutely sure if it will work out or not.

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