Projector / Lense advice for my 2:35 setup - Page 2 - AVS Forum
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post #31 of 37 Old 03-20-2012, 01:30 AM
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Quote:
Originally Posted by TyKelowna View Post

Thanks for the suggestion. I just don't have the depth to go across, and there is also doors on the right hand wall currently, with two more being added due to a renovation. I have the JVC coming hopefully this week, so I will get to experiment with some screen sizes and seat positioning.

If you manage to fit across the room, there is the last option left, with a drop down screen on the right side.
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post #32 of 37 Old 03-25-2012, 04:55 PM - Thread Starter
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The JVC DLA-X30 arrived on Friday, and when it's dark out I've been projecting onto the wall along with the doors & windows.

The first thing: the black bars are just not visible at all when watching a movie, in pitch black, or with any light.

My wife is impressed with the large 2.35 image, she's now officially excited about this whole project. We will be definitely going with the drop down screen in front of the windows/doors, it just works best with the room. (I do appreciate all the alternative room suggestions!)

A noob question: If I'm projecting say a 130" wide image from 20', is there any quality loss if I project from 25' but adjust the projector?
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post #33 of 37 Old 03-25-2012, 05:11 PM
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Quote:
Originally Posted by TyKelowna View Post

A noob question: If I'm projecting say a 130" wide image from 20', is there any quality loss if I project from 25' but adjust the projector?

A longer throw can increase CR but may not be as bright as the shorter throw. You really need to set up and test these for your self.

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post #34 of 37 Old 03-25-2012, 11:15 PM
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at 130 with 20 in throw you get 8fL in brightness.

at 130 with 25 in throw you get 7fL in brightness.

Brightest is at 15'2" in throw and 10fL in brightness (and 13fL with 1.3 gain screen)

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post #35 of 37 Old 03-26-2012, 03:37 PM
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Quote:
Originally Posted by MovieSwede View Post

at 130 with 20 in throw you get 8fL in brightness.

at 130 with 25 in throw you get 7fL in brightness.

Brightest is at 15'2" in throw and 10fL in brightness (and 13fL with 1.3 gain screen)

Sorry, how did you come to these figures? Is screen gain not a major contributing factor?

I have just re-calibrated my BenQ W6000 to 6500K and I am getting a solid 16FL onto my curved AT screen (8 feet wide, gain 1.16). I was originally settled on 12~14FL, but now am quite used to the extra brightness, and didn't want to turn it down to 14 again.

I used to only get 5.5FL fromm my older W5000 and thought I was not measuring correctly.

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post #36 of 37 Old 03-26-2012, 10:49 PM
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Quote:
Originally Posted by CAVX View Post

Sorry, how did you come to these figures? Is screen gain not a major contributing factor?

Of course screen gain do effect the brightness, I used 1.0 gain screen for the calculation and 1.3 on the last () part.

as for calculation

http://www.projectorcentral.com/JVC-...ulator-pro.htm

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post #37 of 37 Old 03-27-2012, 03:47 PM - Thread Starter
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I used www.eliteprojectorcalculator.com and assuming:
1.0 gain
130" wide screen
max zoom throw

and I got:
15.5 fL (11 fL @ 500 hrs)

with everything else on the defaults.

I think that's not going to be bright enough, so I think I've settled on:
120" x 51" which gives 18.3fl (14 fl @ 500 hours)

I'll also move the screen closer.
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