CurtPalme.com Home Theater Forum

[Ridebreck]

My apologies for not knowing this, but was this a gov liq score or did you find these somewhere else? Just curious.

Oh, and a belated YOU SUCK!!

[Nashou66]

[1031]

[larryk]

Yes a Red One Camera will do 4k resolution very nicely. It's an amazing camera. I got to play with one at a workshop recently as we intend to shoot part of our feature on one, although The real scenic shots will still be 35mm film as it is still superior for that kind of thing. We filmmakers here in Edmonton have access to one from our local coop. Let me know when you can display it and I will send you the video to try it out. It's a bitch to edit but it looks amazing.

Larry

[draganm]

[nomadII]

Nashou66,

As for my prior statement re the 9" Conversion, the cost to % improvement equation simply does not make sense.

[Nashou66]

[Nashou66]

[Spanky Ham]

[Nashou66]

Well i finally got around to play around with Actual blending of the LongBows. Like many have said this is not an easy task, and I'm glad I decided to mess around with them on the floor first so I could learn my way around the C2-2250. The hardest part for sure will be the actual alignment and placement of the PJ for the best use of the Phosphor. This is still the part I need to get right(even though this will be one of many trial runs) and another person around would be
much appreciated and useful. The table carts i made do a good job but i should have put threaded rod into the table top where the mounting holes on the bottom of the marquee are. This way i could raise,lower, level and tilt the PJ's to the exact place i need them. I think i will do this this week sometime. It will also help to keep them secure and not move.

Even though i am far off from watchable blend I can see why its so desirable, You can get the image so much sharper using a slightly less lower resolution than with a single or a stack(tried this too earlier). And this is with out any Schiemflug or work on the CPC magnets !! I first tried 1152x800 and was having a hard time with the top 2-3 inches of the grid being squiggly/wavy( need to alter timings but got frustrated and moved on). So i decided to try the perfect 1.33 aspect using 800 as the horizontal, that came out to 1064x800 for each PJ. Once i set up and converged this res at 72 Hz on each I began to move the PJ's into as close to where i thought they should be for a 10% blend zone. this is where I think I need to get some one's help that has blended. I couldn't get the Images to over lap at first with out moving one of the images over and losing its left or right most position on the edge of the screen. I finally was able to somewhat get enough overlap to get a fair matched blend zone. I do need to learn how to move the PJ's with relation to the screen, I think i am trying to hard to max out the raster and should just try to match the aspect on the screen. Practice here will make perfect.

The C2-2250 is a very cool VP, even if not for Blending. the resolution editor is great and allows you to see before hand what the Pixel clock will be. also load ing the res into the VP is fast and making changes this way is not as cumbersome as I originally envisioned it to be. And those high refresh rate possibilities from the DVI out is way cool.
Before i tried the blend earlier this week i set them up in a side by side stack after i was failing miserably with the blend.
A stack is much easier and the ultras added Geometry is awesome compared tot he standard Marquee's.
I ran 1080p@72 out and it did look super nice, and geometry was spot on. I was going to take a screen shot and in my haste i tripped over the power cord moved the PJ and Effed up the whole set up So i did nothing till today and did the half ass blend. The C2-2250 has all the controls you need to manipulate the image and I found out what i needed to get a closer blend, it was almost aligned to a watchable alignment but i was off on the over lap area so anything moving through the "seam" looked like it was going through a heat wave off hot asphalt( get the visual?)

The most important thing is color calibration for sure!!! I just did both by eye and if you do not have them both exactly the same i cant see how you can blend. This is where i stopped for now as i had to go to work. But this is going to be a fun project, and i am sure i will be able to get it perfect once i keep at it and learn more about the VP and the longbows.

I definitely should invite Craig Rounds to stay at my place on his way home form the calibration tour... maybe i can convince him this is a good learning experience

Athanasios

[Kiev Savoie]

Just curious, this guy Craig Rounds is on a tour Calibrating systems? Does he have a web page? I would like to know more.

Congrats on getting your blend started. It sounds like fun even if it is a bit daunting (new projects always are though right?)
I can't wait to see some pics once you have it close to finished.
good luck

[Nashou66]

[Gino]

[Nashou66]

[Gino]

[tse]

Attached is a worksheet for calculating VESA video timings. It has the formulas used to determine the lines and pixels. VESA is an attempt to standardise timings. Sometimes the answer might need to be tweeked. For instance, the Marquee does not like horizontal sync that is less than 1us in width.

Scott

[schmoe]

Interesting spreadsheet. Thanks for sharing.

According to the spreadsheet, the VESA timings for 1080p are quite different than the usual timings I see for devices that output 1080p.

"Typical" 1080p:
H Front: 88
H Sync: 44
H Back: 148
Total Blank: 280

VESA 1080p:
H Front: 128
H Sync: 200
H Back: 328
Total Blank: 656

VESA 1080p - Reduced Blanking:
H Front: 48
H Sync: 32
H Back: 80
Total Blank: 160

[schmoe]

tse's suggested settings came close but didn't quite work for me. Still have about 4% cut-off on the left side. The sweet spot for me seems to be around 518 blanking pixels. FWIW, I tried the VESA timing and it got the entire picture in as expected (656 blanking pixels!) but the image became squished. I would have had to increase the h-size on the PJ.

[Nashou66]

Yeah you have to play around as it depends on how much raster you have and other things as well. I think my total pixels were like over 2600. You just have to keep playing around with it. The TV-One resolution editor that you use to store the timing and resolutions aslo is the same an figures out pixel clock and so forth.
I like it a bit better because it looks more like a HTPC set up even though I dont use a HTPC. I think I linked it somewhere in this thread.

here is the link: it starts the down load right away....

C2 Resolution Editor

Athanasios

[tse]

The resolution editor looks like it gives the same answers as the spreadsheet except the vertical front porch and back porch lines are reversed. It's very unusual for the front porch to be larger than the back porch.

Scott