CurtPalme.com Home Theater Forum

[dturco]

Damn so it was you guys I stoped bidding at $650 on 4 different sets. I guess I did not know a secret then? Kidding. Maybe.

[Nashou66]

[dturco]

So I guess I will be buying from Curt> Nice and Safe That way. But now barco 808s or marquee 8500?

[Nashou66]

well I feel a little better now, TSE told me that the mounting plate should be able to be put in either configuration, this was with AC only units:

[Angus_rg]

Since you have 5 projectors, I'd say do 1 and 2. Now thems some bragging rights.

Seriously, 2 brand spanking new tubes using max raster when blended with HD145s; I would think that would be sharper than Einstien and a lot less work.

To think I was proud that I just scored a refurbished 57" Hitachi 57F59 for my upstairs for $323, shipping included.

[Nashou66]

Good news for those who got the Longbow Ultras!!!

[Bruce 09]

[Nashou66]

I decided to have them shipped like you are , I have some employee issues here and don't think I can make the trip down. plus it cost just as much to drive down rent a trailer and come back, plus I wont loose two days for the trip!!!

Athanasios

[Gino]

Congrats guys! You guys suck!

Hmm.. 3:4 orientation, if you had 3 of them side by side like this, you'd get 9:4, reduce the height a bit on the raster and you could go for a 3 projector cinemascope blend, and the centre of your screen wouldn't be in the blendzone. Would be tough to setup, but oooh, the light!

[Nashou66]

I thought about it but id need to go to a 18 foot screen or so and Not enough room for it. But it be cool as hell!!! And also Scott said these are not the "dome" versions so he thinks the tubes are in the normal landscape orientation.

Athanasios

[Nashou66]

Arranged for a pick up on friday, should show up at the Yellow DOcks here in Buffalo on monday or tuesday! Cant wait!!!!

Athanasios

[Spanky Ham]

[schmoe]

MTF?

[Zebu Fellenz]

[Nashou66]

Hmm MTF the best i can describe it is the amount of light spread onto a black area if light was passed through a very very thin slit. So the thin light beam would hit the target area and then how sharp that slit is, the less spill over onto the surrounding surface the higher the MTF, if it spreads into the dark area it has a lower MTF. Thie test is used to determine how well optics(lenses) can keep the thin slit together on its way to the target. Or close to something like that. here is better explanation.

http://www.trioptics.com/knowledgebase/mtf.php

The Modulation Transfer Function (MTF), describing the resolution and performance of an optical system is the ratio of relative image contrast divided by relative object contrast MTF = Relative Image Contrast/ Relative Object Contrast. When an object (illuminated target or reticle) is observed with an optical system, the resulting image will be somewhat degraded due to inevitable aberrations and diffraction phenomena. In addition, a real lens will not fully conform with the design data. Manufacturing errors, assembly and alignment errors in the optics will deteriorate the overall imaging performance of the system. As a result, in the image, bright highlights will not appear as bright as they do in the object, and dark or shadowed areas will not be as black as those observed in the original patterns. In general an illuminated target can be defined by its spatial frequency (number of bright and dark areas per millimeter) and the contrast (the apparent difference in brightness between bright and dark areas of the image).




fig 1)A perfect grid pattern is imaged through the sample into the image plane



Fig. 2: MTF = Contrast vs. spatial frequency. This figure shows the MTF of a diffraction limited optics and a measured MTF reffering to Fig. 1



Fig. 3: The image of a perfect slit is called "Line Spread Function"

Atanasios

[Nashou66]

Well they are at the Yellow docks as I type here from work..... I decided not to wait till after work tomorrow , so I am leaving for a bit and go get um now with my buddy and his Van!!!! I am glad Yellow is open 24 hours!!!!!



Athanasios