AVS Forum banner
Status
Not open for further replies.
1 - 10 of 10 Posts

·
Registered
Joined
·
302 Posts
Discussion Starter · #1 ·
PJ is ECP4100. The PJ currently has HD6C lenses on it. Will color corrected HD-144's fit? Will I notice a large difference in quality (is it worth the trouble)? BTW - I will be changing out all the coolant in the tubes (new stuff is all clear), if that makes a difference.


Also: I've heard the HD-144's have a shorter throw distance than the HD6C's, but cant find specific info - exactly how much shorter is it? (will I need to move my PJ more than a few inches for the same size screen?)


Thanks,

--Eric
 

·
Banned
Joined
·
2,582 Posts
OK Yes I beleive the lenses will fit.


If you have colored coolent it takes the place of the red and green filters as the colored coolent is the filter. IMHOP I think it should look as it does. I do hear however it looks amazing with the HD144's and clear coolent as the coolent needs to be changed do to over kill on the filtering. I dont know if its worth the effort because your just doing the color correction by another meanse as its already corrected. If you do ever have to change the collent its almost impossibe to get colored coolent so in the long run yuo are kind of future proofing the unit by swapping lenses and changing the fluid. I suppose also if your tubes are not funged and the coolent is a bit old you will prolong it by using new clear fluid at this point as well.
 

·
Registered
Joined
·
302 Posts
Discussion Starter · #3 ·
The PJ will have clear coolant in about 2-3 weeks. Now I'm just worried about the throw difference... You think 5% difference would be a good estimate on the change in PJ distance from the screen to green lens?


Thanks,

--Eric
 

·
Banned
Joined
·
2,582 Posts
Actually I think the throw distance is the same between the HD-6 lense and 144's. Not sure but you shouldl have enough adjustment to make a correction without having to remount the projector.
 

·
Registered
Joined
·
302 Posts
Discussion Starter · #5 ·
>>>>I think the throw distance is the same between the HD-6 lense and 144's


That would be nice - anyone else know for sure???


Also: I've read that the greyscale will need to be re-adjusted with these lenses... Cant really find anything specific in the service manual on this (maybe i'm looking in the wrong place) - do I need specialty tools to do this, or is it a simple adjustment such as focus, g2, etc?


Thanks,

--Eric
 

·
Registered
Joined
·
1,049 Posts
I've tried the HD-144's to see if they would fit on my projector that uses the HD6's as standard. The HD144's are not the same throw length. I didn't move the projector, but it would definitely need to move forward somewhat to produce the same size image as the HD6's. I can't give you an exact difference. I'm guessing at least 5%, maybe a little more.


I haven't decided if I want to change out the colored fluid, and perform a total swap, or just sell the HD144's outright. The HD144's are definitely an upgrade in terms of image quality, and quality of construction.


Ray
 

·
Registered
Joined
·
302 Posts
Discussion Starter · #7 ·
Whether or not I go for the hd144's hinges on ONE question... I will have a minimum of 102" of distance between the lens and screen, but can only go up to about a 66" wide screen max... Does anyone have a formula that can tell me if it will work or not?


Thanks,

--Eric
 

·
Registered
Joined
·
6,134 Posts
It tells you in the help menu (detailed setup screen) that you should set the PJ at 1.5 times the screen width. If your current setup allows for plenty of adjustment with the HD6C lenses, then you should have no problem with the HD144 lenses. I just tried a set off my NEC to my backup ECP and it worked fine.


Chip S.
 

·
Registered
Joined
·
302 Posts
Discussion Starter · #9 ·
Just thought of another question: Do you loose a lot of light output going from HD6's to HD144's?


--Eric
 

·
Banned
Joined
·
2,582 Posts
You should change the fluid to clear if you go with the 144's as this is double filtering if you ask me and not necassary.


Grey scale adjustment is done by setting the G2's. If you havent done this do it first befor you go through all the trouble of upgrading. You may be very supprised with what you al ready own and have all ready installed.


I have read posts on changing to 144's and was goign to do this a whilel ago but after calibrating my projector and getting a good grey scale I see no need in just changing the lenses. I dont want to have to re mount the unit. This wouldnt be so bad because I am moving in a few months and I am going to have to re do my entire theater any way so thats not an issue if I now decide to get a set of lenses.


I am in the process though of upgradign projectors if a deal goes through and I will end up with the 144's on a NEC 6PG so Ill just upgrade the entire projector LOL :)
 
1 - 10 of 10 Posts
Status
Not open for further replies.
Top