|
As this forum is rarely used anymore, we've locked it. Feel free to browse and read. Questions? Please reach out to us directly. Cheers! |
|
 |
|
|
| Author |
Message |
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
| Posted: Tue Nov 25, 2008 6:41 pm Post subject: Re: What lens options do I have with a 9500LC? |
|
|
| nuttall_chris wrote: | | CRT_Ben wrote: | | nuttall_chris wrote: |
The HD215 lenses won't work with the 9500LC, the C-elements are larger for the HD10 series of lenses.
Chris. |
OK, good to know. From what I could gather it sounded like the C-elements were different but I wasn't positive, thanks for confirming that.
In other news I was reading through the 8500LC/9500LC install manual posted on Curt's site(http://www.curtpalme.com/docs/ElectrohomeMarquee8500_9500_Install.pdf), and the throw formulas for HD10s and HD10Ls are different - very different!
HD10 - 1.25*W+6"
HD10L - 1.54*W+3.3"
Interesting - so according to the factory formulas (which are conservative, I know, but the difference between the two lenses should be valid), the throw distances for a 96" wide screen are as follows:
HD10 - 1.25*96+6 = 126"
HD10L - 1.54*96+3.3 = 151"
It was awhile ago since I switched to the HD10L's and I don't remember if the throw distance was different or not (it's floor mounted so it's easy to move). I'll try to pop one of my HD10's on tonight if I have time, but that's not likely, so it might have to wait until after the holiday. Does anyone have experience switching from 10's to 10L's or vice-versa?
Ben |
I've tried HD10L, HD10, HD10-GT17 and HD10F lenses. The difference in throw distance is basically 0 for all of these lenses, the formula you posted is incorrect for the HD10L lenses. Look at the updated info in appendix B, here.
Chris. |
This is good to know as well for me , as I plan to set up the blend I wanted to use all HD10 GT17's, i have two set' but one set has the tube side lenses scratched  I have a set of HD10L's and a set of HD 10's also so i was planing on one Hd10 GT17 on each green, one HD 10 on each Red and one HD 10L on the blues since these will be defocused anyhow.
I will use this set up till I either find all HD10gt 17's or two sets of HQF 900's for Cheap  Or is it possible the inner element for either of the other lenses could be swapped to the HD10 GT17's ?Maybe one of the other lenses use the same inner lens?
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
|
|
| Back to top |
|
 |
CRT_Ben
Joined: 28 Aug 2006
Posts: 1684
Location: Northern Virginia
|
| Posted: Tue Nov 25, 2008 6:44 pm Post subject: Re: What lens options do I have with a 9500LC? |
|
|
| nuttall_chris wrote: |
I've tried HD10L, HD10, HD10-GT17 and HD10F lenses. The difference in throw distance is basically 0 for all of these lenses, the formula you posted is incorrect for the HD10L lenses. Look at the updated info in appendix B, here.
Chris. |
Hmm, you are correct. Thanks for the link - it seems like TD would vary by 2-3 inches at most between the different lens types.
So now I have to pick my poison, I guess:
1) Live with a smallish screen (~75" wide)
2) Live with a very large screen (almost 12 feet wide, in a room that's only about 13.5 feet wide)
3) Mount the PJ under the beam and give up the center seat in the 2nd row
4) Build a false screen wall, use an AT screen (which has advantages) and give up roughly 2 feet of room length. I know a pull-down screen could be used here to avoid giving up room length, but I'd really like a fixed screen. Another advantage of this method is it could possibly be used as an IB setup?? (If you had a non-AT screen)
|
|
| Back to top |
|
|
ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
|
| Posted: Tue Nov 25, 2008 7:52 pm Post subject: |
|
|
Ben, you should also consider viewing angles in your different scenarios.
1) IMHO, a 75" wide screen is damn small in a 13.5-foot wide room (my room is 13' wide, BTW). I hate when people do nice, big theater rooms with lots of seating and put a dinky screen not much bigger than a big RPTV. It's a THEATER. They call it the BIG SCREEN for a reason! I LOVE the look of my 8'-wide screen in my 13'-wide room - it just fits the scale, and the screen size is very nice and view angles are excellent for both my rows. Some would say too close in my front row, but I immersion. However, it really depends on how close you'll be sitting whether this would be too small. Maybe not if you have a very short seating distance. Not so much for a back row, though. One thing's for sure - A 9" would be RAZOR sharp and nice and bright on a screen that size.
2) Way too big, IMHO unless you went 12' wide CIH. Even then, hard on tubes, soft, etc.
3) Sounds ugly, and losing seating sucks. I have 6 seats and always wish I had a couple more...
4) Lots of advantages. Clean screen wall, AT, IB?, potential masking opportunity, hidden acoustic treatments. Again, what are your resulting viewing angles and what do you prefer? I would love to do a CIH/AT setup. I'll definitely be doing something like that in my next theater. Scope material should be BIG and WIDE! The only down-side is some loss of square footage. Time-wise, you could probably knock out a false wall and cover it in removable panels in a Saturday.
SC
|
|
| Back to top |
|
|
CRT_Ben
Joined: 28 Aug 2006
Posts: 1684
Location: Northern Virginia
|
| Posted: Tue Nov 25, 2008 8:45 pm Post subject: |
|
|
I think you've convinced me, SC. The more I think about the false wall setup the more I like it. Even if I didn't do an AT screen I would still hide my fronts, center and subs behind the wall which would make for a very clean screen wall and room...and this way, I can make the screen exactly as big as I want it. I agree about the small screen comment...my current screen is apartment-limited at 67" wide and I really want something significantly bigger.
The viewing angles with an 8' wide screen would be pretty good, I imagine. I'm also looking at theater seating and I don't think I can fit four across in my room, so with three seats in each row, all viewers would pretty much be inside the screen edges which would be great. One question though - what did you mean by "potential masking opportunity", were you talking about screen masking?
I would like a CIH setup but not as much as others it seems, and I'm not really willing to do that with CRT even though I have a spare chassis. Next house/theater will probably have a digital and at that point a CIH setup is a no-brainer!
Ben
|
|
| Back to top |
|
|
ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
|
| Posted: Tue Nov 25, 2008 9:08 pm Post subject: |
|
|
Yes, I meant screen masking. The false wall and shadowbox allows you to hide all sorts of nasty wiring, pulleys, etc. Not that you have to - just an option. I couldn't do masking if I wanted to with my screen because it's all "out there".
OK, now draw it up and put some real numbers with your ideas! It's nice to see seating, viewing angles, throw distances, and screen sizes, all start to "feel more real" when you start putting it on paper.
SC
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
| Posted: Tue Nov 25, 2008 11:09 pm Post subject: |
|
|
I agree BIG screen is the way to go. Sure I loose light output with my 12' 1.78 screen but when your about 1.2 x screen width away you are totally immersed.
Pull out the second PJ and floor mount it for the stack and it brightens up nicely. my room is 16' wide so the 12' screen fits nice. You should go 9 foot I think you'll love it, maybe 10.
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
|
|
| Back to top |
|
|
Heywood Jablome
Joined: 12 Mar 2006
Posts: 1548
|
| Posted: Tue Nov 25, 2008 11:56 pm Post subject: |
|
|
Ummm.... How about a floor mount UNDER the screen (in a presidium hushbox if you like) with a FS mirror strategically placed? Sure it'll mean a structure in the middle of the room a few feet in front of the screen but MAY be do-able if the geometry lines up.
_________________
"Those countries which lag behind in industry, in the application of mechanics and technical chemistry, in the careful selection and utilization of natural products, where the respect for such activities does not permeate all classes of society, will unfailingly decline in prosperity. They will sink faster when neighbor states, with an energetic exchange between science and industry, go forward with renewed vitality."
-- Baron Alexander von Humboldt: 1769-1859
|
|
| Back to top |
|
|
ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
|
| Posted: Wed Nov 26, 2008 12:34 am Post subject: |
|
|
I love that idea and have thought it about it a lot over the years, but it's highly unlikely that will work in most people's rooms...
If you think about the throw distance involved - let's say a 10-foot throw - the mirror always ends up either being too big or in the wrong place. For instance, if the projector's lenses are flush with the screen surface, the center of the mirror will be 5' into the room, and worse, the mirror will be approximately HALF the size of the screen. So, to get the mirror smaller, it has to be close to the projector... which means the projector will have to be close to where it would be normally but flipped (facing away from the screen), and with a mirror 2'x4' in front of the projector. UGLY.
Try drawing it up some time... It just doesn't work... Which is why you practically never see mirrors anywhere but RP setups.
SC
|
|
| Back to top |
|
|
Zebu Fellenz
Joined: 21 Dec 2006
Posts: 2567
|
| Posted: Wed Nov 26, 2008 12:36 am Post subject: |
|
|
| Heywood Jablome wrote: | | Ummm.... How about a floor mount UNDER the screen (in a presidium hushbox if you like) with a FS mirror strategically placed? Sure it'll mean a structure in the middle of the room a few feet in front of the screen but MAY be do-able if the geometry lines up. |
Do you mean like a glorified version of the old CRT TV's that had the pop-out mirror on the front that reflected the light to the screen?
|
|
| Back to top |
|
|
Heywood Jablome
Joined: 12 Mar 2006
Posts: 1548
|
| Posted: Wed Nov 26, 2008 12:50 am Post subject: |
|
|
| Zebu Fellenz wrote: | | Heywood Jablome wrote: | | Ummm.... How about a floor mount UNDER the screen (in a presidium hushbox if you like) with a FS mirror strategically placed? Sure it'll mean a structure in the middle of the room a few feet in front of the screen but MAY be do-able if the geometry lines up. |
Do you mean like a glorified version of the old CRT TV's that had the pop-out mirror on the front that reflected the light to the screen? |
Yeah... that's what I meant. Could still work with the more compact chassis (D50, DWIN, Barco 70x...) facing straight up with a small flip-up mirror, but that would put the PJ pillar in the middle of the room too...
_________________
"Those countries which lag behind in industry, in the application of mechanics and technical chemistry, in the careful selection and utilization of natural products, where the respect for such activities does not permeate all classes of society, will unfailingly decline in prosperity. They will sink faster when neighbor states, with an energetic exchange between science and industry, go forward with renewed vitality."
-- Baron Alexander von Humboldt: 1769-1859
|
|
| Back to top |
|
|
Zebu Fellenz
Joined: 21 Dec 2006
Posts: 2567
|
| Posted: Wed Nov 26, 2008 1:05 am Post subject: |
|
|
|
It could also work quite good with a split pack.
|
|
| Back to top |
|
|
|
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Forum powered by phpBB © phpBB Group
|
|
