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Maurice089 · Guest

hey I have a Marquee 8500 with color corrected tubes and I'm looking for color filtered hd144 lenses. Is there any problem to have color corrected tubes and color filtered hd144???

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

draganm · Joined: 08 Mar 2006 Posts: 8990 Location: Colorado

Maurice089 · Guest

where's the differnce between the hd144 and the hd145???

Sparky015 · Posted: Mon Apr 26, 2010 7:04 pm Post subject:

yep, if your tubes are already color corrected, you don't want color filtered lenses. I believe the only difference between a 144 and 145 is the screen size range. I don't recall that range off hand, but both work for home theatre size screens. I believe clear 144/145s are a bit easier to come by as well.

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Let me make sure we're all on the same page here.

Normally "color corrected" is applied to lenses, and it means they were properly designed so they don't have chromatic aberrations. Pretty much all 8"/9" projector lenses are color *corrected*, even if they are clear.
"Color filtered" means lenses that have colored filters (gels) in them, so they correct the light that comes out of the tube so the result is closer to "correct" red or green. (The phosphors don't produce exactly the right colors.)

I've never heard of "color corrected tubes" and I'm not sure what you mean. Do you mean the glycol is colored, or...?? If you look at the red and green tubes (with the projector off and lenses removed), do they look white or do they look red/green?

If you actually meant "color corrected lenses," and assuming those lenses are all clear, then yes, you'd benefit from going to color-filtered HD144's.

Maurice089 · Guest

The Gykol of the red and green is colored ^^

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Ah, OK. Then yes, you don't want colored lenses on top of that.

Maurice089 · Guest

could i change the gylkol so that i can use the color filtered hd144??

Sparky015 · Posted: Mon Apr 26, 2010 7:46 pm Post subject:

So your machine is an 8500LC? a standard 8500 should ve air-coupled, meaning no glycol, or am I missing something?

Maurice089 · Guest

The Pre-Owner said its a 8000 with HDM Boards and Neckboard from a 8500 and that these are the differncees between the 8000 and the 8500... I'm not really sure what it is :S

Sparky015 · Posted: Mon Apr 26, 2010 7:57 pm Post subject:

Can you post pics? The main difference between an 8000 and an 8500 is the addition of electronic astigmitism. There are other differences as well, such as more up-to date electronics, but the one detail missing from an 8000 is ASTIG. An 8000 is air-coupled, no glycol. The only 8" Marquee that I know of that uses Glycol, is the 8500LC. Sounds like you have an 8000 with a newer HDM and neckboards. I would bet then that your machine is an AC model.

What lenses do you have now? HD8s? Can you post pics of your machine?

Sparky015 · Posted: Mon Apr 26, 2010 8:00 pm Post subject:

If it is and AC, then your tubes are what are color filtered. In which case you have no choice but to get clear HD-144/145s. To be honest, I believe those are easier to come by and cheaper, as the color filtered ones are harder to find, and more in demand, as stock tubes in a Marquee are normally not color-filtered from what I've seen, at least not in the US.

Maurice089 · Guest

There's a chamber with glykol which is colored

Sparky015 · Posted: Mon Apr 26, 2010 8:31 pm Post subject:

Interesting. I've not heard of an 8" LC before. Of course, I wouldn't consider myself a Marquee expert either. Mr. Green

I'll let the experts pipe up here as to what is easiest. My opinion is that if you can't find a set of clear lenses in Europe, then go color-filtered and change the glycol to clear. Not sure how old that glycol is either. You may be due to be changed anyway. That's without knowing how easy it is to change it on that machine though. One of the experts here is best to answer. The other thing I'm unsure of, is if HD144/145s can go on an LC machine.

Tom.W · Joined: 09 Mar 2006 Posts: 6635

Quote:

The other thing I'm unsure of, is if HD144/145s can go on an LC machine.

The answer is no. Plus dyed glycol doesn't work with LC lenses...

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Paul, it's not an LC. *All* AC projectors (that I know of anyway) have a glycol chamber in front of the tube to help disperse heat off the tube face. What you see when you pull the lenses is NOT the front of the tube, but the glass on the front of the glycol chamber.

Because the glycol chamber has a uniform thickness (unlike LC chambers), you can tint the glycol to color-filter the set without special lenses or LC C-elements. If the tinting was done properly and the glycol is still OK, then as far as I know it's just as good a solution as color-filtered lenses. Some projectors (Barco??) do ALL their color-filtering that way.

Anyway, back to 8500's. Since the glycol is tinted, this must be an AC set. HD144's won't go on that projector without Joust mods or similar.
That said, there ARE 8500LC's. They're not common but they do exist. As Tom says, LC's take different lenses so they wouldn't work with HD144's.

Maurice089 · Guest

thanks guys

Maurice089 · Guest

so paul you say painting the glykol is just as good a solution as color-filtered lenses??? I'm not really sure if a should take color filtered hd144 and change the glykol or take hd144 or hd145 which are not color-filtered:S what would you guys prefer???

roland@b4 · Joined: 07 Jul 2009 Posts: 82 Location: Reading UK

I would have thought clear glycol and colour filtered lenses would give the better result.