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thewolfman
Joined: 28 Mar 2011
Posts: 1311
Location: Sweden
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| Posted: Fri Mar 07, 2014 8:51 pm Post subject: Dot uniformity |
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This might be might last issue I have. The image gets over-acculturated (bigger) in either center or edges.. why do I often end up with dots smaller than my sides or the opposite? Now if Marquee had more zone controls it would be easy to correct this..but the way I see it RGB -focus in center does sides as well.. doing sides alone does not impact on centre as much as the opposite. Just for fun, I took lens-flap to it's extreme, on one side, to make it ridiculously sharp, well if anything gets to be THAT sharp and it happens to be digital I'm totally sold on digital being the very master at sharpness.
The pj is 2 inches to forward for using short retrace (I must use this) but will make a pully next week to force it backwards using chains. I tested it last night on one side and it works. It also raises it to be be more in the exact position of a 90 degree angle to the screen. It's hanging like 2-3 inches lower now so it's a win win I guess.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Fri Mar 07, 2014 9:51 pm Post subject: |
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When you do the astig, aim for perfection in the center. All electronics will be null for astig at this time, so from there with your perfect center astig, go around what ever zones you have and make them perfect too.
Then your dots will all be nice and round.
_________________
Barco Cine 9, ,Sony VPL570ES 4K SXRD, 135" OZ Theatre Majestic 16:9 screen, Denon X6700in preamp mode, 2x 7ch Tonewinner amps, 2x Tonewinner 15" subs, 2x 10" subs, 7.2.6...
RUNCO DTV991 LC ( NEC XG 852 LC ) 100" 4:3 screen, H/K AVR 7.1...
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Fri Mar 07, 2014 9:55 pm Post subject: |
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After a quick re-read, it may not be focus or astig youre talking about, sounds more like linearity and pincushion.
_________________
Barco Cine 9, ,Sony VPL570ES 4K SXRD, 135" OZ Theatre Majestic 16:9 screen, Denon X6700in preamp mode, 2x 7ch Tonewinner amps, 2x Tonewinner 15" subs, 2x 10" subs, 7.2.6...
RUNCO DTV991 LC ( NEC XG 852 LC ) 100" 4:3 screen, H/K AVR 7.1...
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thewolfman
Joined: 28 Mar 2011
Posts: 1311
Location: Sweden
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| Posted: Fri Mar 07, 2014 10:02 pm Post subject: |
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| CasetheCorvetteman wrote: | When you do the astig, aim for perfection in the center. All electronics will be null for astig at this time, so from there with your perfect center astig, go around what ever zones you have and make them perfect too.
Then your dots will all be nice and round. |
Ok. sounds good.
Semi-topic again.. out of the G90 and Barco high end you are using.. who has the best zone control to make it perfect? The most zone controls I mean.
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thewolfman
Joined: 28 Mar 2011
Posts: 1311
Location: Sweden
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| Posted: Fri Mar 07, 2014 10:15 pm Post subject: |
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| CasetheCorvetteman wrote: | | After a quick re-read, it may not be focus or astig youre talking about, sounds more like linearity and pincushion. |
Ahh.. sorry to have missed that.
Will give you this information..
1. I for one never used C Lin ever before except for this week. Gave it a go and made those look equal. But then when I tried Vert and Hor S It all went to hell. Don't remember exactly what happen but quickly went back 50/50. C Lin H is currently at 10 and V C at 50.
EDIT: S Lin is @ 50/50 now and is the way it should be I just realised.
Last edited by thewolfman on Fri Mar 07, 2014 10:45 pm; edited 1 time in total
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thewolfman
Joined: 28 Mar 2011
Posts: 1311
Location: Sweden
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| Posted: Fri Mar 07, 2014 10:38 pm Post subject: |
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| CasetheCorvetteman wrote: | | After a quick re-read, it may not be focus or astig youre talking about, sounds more like linearity and pincushion. |
Will give it ago when pulling the chains backwards 2 inches 2 weeks from now. I think it will solve many of my problems.
Thanks OZ.. !
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Mar 08, 2014 1:33 am Post subject: |
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I dont have a G90, only NECs and a Barco. They both have alot of zones for most things, but the NEC has significantly more adjustment types.
I dont know the settings in a Marquee, so youll need to wait for a Marquee user to tell you what the settings do there.
_________________
Barco Cine 9, ,Sony VPL570ES 4K SXRD, 135" OZ Theatre Majestic 16:9 screen, Denon X6700in preamp mode, 2x 7ch Tonewinner amps, 2x Tonewinner 15" subs, 2x 10" subs, 7.2.6...
RUNCO DTV991 LC ( NEC XG 852 LC ) 100" 4:3 screen, H/K AVR 7.1...
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sat Mar 08, 2014 12:08 pm Post subject: |
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The best projectors electronics can not adjust out bad positioning of coils and other magnetics on the tube neck.
Just sayin.
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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thewolfman
Joined: 28 Mar 2011
Posts: 1311
Location: Sweden
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| Posted: Sat Mar 08, 2014 12:39 pm Post subject: |
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The angle is off a little so it will never be right. Even if it was, I couldn't tell whether a dot is over-focused or under-focused I just stop when it's round and even, with a dot that's more or less in the middle of that halo. I tested to move the focus coil up and down, with focus at 50, but that did nothing for me other than move around the image, so I did what I always do and cram everything as much forward as I can. But it's an enjoyable image and shouldn't complain so much about this.
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Sat Mar 08, 2014 12:58 pm Post subject: |
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| thewolfman wrote: | | The angle is off a little so it will never be right. Even if it was, I couldn't tell whether a dot is over-focused or under-focused I just stop when it's round and even, with a dot that's more or less in the middle of that halo. I tested to move the focus coil up and down, with focus at 50, but that did nothing for me other than move around the image, so I did what I always do and cram everything as much forward as I can. But it's an enjoyable image and shouldn't complain so much about this. |
If your picture is moving with the focus coil placement, then your centering astig magnet isn't set right.
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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thewolfman
Joined: 28 Mar 2011
Posts: 1311
Location: Sweden
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| Posted: Sat Mar 08, 2014 1:02 pm Post subject: |
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| gjaky wrote: | | thewolfman wrote: | | The angle is off a little so it will never be right. Even if it was, I couldn't tell whether a dot is over-focused or under-focused I just stop when it's round and even, with a dot that's more or less in the middle of that halo. I tested to move the focus coil up and down, with focus at 50, but that did nothing for me other than move around the image, so I did what I always do and cram everything as much forward as I can. But it's an enjoyable image and shouldn't complain so much about this. |
If your picture is moving with the focus coil placement, then your centering astig magnet isn't set right. |
Ok, that was useful information, I'll remember that and try again sometime.
As for the angle towards the screen, I could drill 2 new holes for the screen and move it bit to the left, and than swivel the pj to correct it as I can with the thingy I made at back end of it. But that would require more precise measurements to confirm with someone helping me out on this.
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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Sat Mar 08, 2014 4:09 pm Post subject: |
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2 inches too close or too far away from the screen matters to focus?
If the position matters that much, why did they make the lenses adjustable?
I mean :move the pj around to get the picture to fit the screen. Then focus etc"?
_________________
When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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thewolfman
Joined: 28 Mar 2011
Posts: 1311
Location: Sweden
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| Posted: Sat Mar 08, 2014 6:45 pm Post subject: |
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| 416ray4538 wrote: | 2 inches too close or too far away from the screen matters to focus?
If the position matters that much, why did they make the lenses adjustable?
I mean :move the pj around to get the picture to fit the screen. Then focus etc"? |
This is not the answer for your question really, it's more what happen to me.
When I moved around the pj like that, with an image on and maxed out the raster, I used long retrace back then, but now when I only use short retrace it's much harder to fill screen lengthwise. I use Custom resolution Utility and a resolution that finally works without introducing ghost patterns and other nastiness, so I'm not going to jinx it with yet another resolution that's a little bit wider. I got an image now that's missing that last 1 cm on the edges, so I stretch it a little bit and correct the dots electronically because they get oval with this solution, but correcting the ovalness on blue doesn't work any longer so I need to move the pj backwards and re-set everything to get uniform dots. This is because with a re-set I get very round dots indeed from the get go, doing this blue doesn't have to work either. I don't know why blue can't be corrected electronically any longer, but think that blue Frankenyoke got a loose cable or something, well, if those have anything to do with this I'm not sure of that. Blue RGB-focus works though. With stretching I also get some discolouration on the edges that will be removed with moving the pj so I have to do this.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sun Mar 09, 2014 3:41 pm Post subject: |
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| 416ray4538 wrote: | 2 inches too close or too far away from the screen matters to focus?
If the position matters that much, why did they make the lenses adjustable?
I mean :move the pj around to get the picture to fit the screen. Then focus etc"? |
First all projectors have the capacity for different size screens so for X size screen the projector has to be X far from the scrren to fill it. It is not a zoom lens so each change in distance requires different optical focus. Another problem is knowing if you have bad optical focus or beam focus. You really need correct optical focus before you can blame beam focus. This is where the "phosphor grain optical focus technique" is usefull.
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Mon Mar 10, 2014 7:28 am Post subject: |
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Having it not square to the screen wont really matter either as long as you set the lens flapping correctly.
_________________
Barco Cine 9, ,Sony VPL570ES 4K SXRD, 135" OZ Theatre Majestic 16:9 screen, Denon X6700in preamp mode, 2x 7ch Tonewinner amps, 2x Tonewinner 15" subs, 2x 10" subs, 7.2.6...
RUNCO DTV991 LC ( NEC XG 852 LC ) 100" 4:3 screen, H/K AVR 7.1...
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thewolfman
Joined: 28 Mar 2011
Posts: 1311
Location: Sweden
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| Posted: Mon Mar 10, 2014 8:02 am Post subject: |
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| CasetheCorvetteman wrote: | | Having it not square to the screen wont really matter either as long as you set the lens flapping correctly. |
Ok, then it should be pretty dead on already as I went through lens-flap some days ago. It's probably overkill to adjust any further with those angles, but pulling it backwards I will do unless I find a resolution that will make just a bit wider to fill the screen. It's not missing much. I will also move the focus coil one more time, but this time with a initialized pj and focus @ 50.. maybe that makes easier to see if gets any sharper. If that doesn't work either, then I will have it as sharp as I can and move it.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Mar 11, 2014 9:37 am Post subject: |
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Set the image up on the green tube face then move the machine to the correct distance.
_________________
Barco Cine 9, ,Sony VPL570ES 4K SXRD, 135" OZ Theatre Majestic 16:9 screen, Denon X6700in preamp mode, 2x 7ch Tonewinner amps, 2x Tonewinner 15" subs, 2x 10" subs, 7.2.6...
RUNCO DTV991 LC ( NEC XG 852 LC ) 100" 4:3 screen, H/K AVR 7.1...
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