Originally Posted by pcarfan
Can I get away with using a 166" 1.3 gain (Cinema vision Da-Lite) screen, with a Sony VPL-HW50ES and the cinevista lens? I may have to run the Sony at high power but heard it's quite silent anyways.
With the anarmorphic lens I am not wasting any brightness above and below the screen like I would using lens zoom (am I correct?). I am hoping the cinevista lens will be the final solution in my quest for a 166" screen.
The room is a basement room, and the screen will be 40 feet away from the closets window. But at day time it could get some light, but not much. I prefer to watch at nights anyways. So, light should not be an issue.
I am not a fan of higher gain screens due to the highly restrictive view angles.
Your recommendation/opinion is highly appreciated. Thanks!
P.S: if not, how about a 146" scope screen?
I've been following your comments on the "Can I get away with a 2.35:1 screen for my home theater with a JVC RS46?" thread so I have your room specs from there.
Yes, an anamorphic lens like the CineVista means that no light is lost to the black bars. The increase in brightness over zooming can be as much as 30%, with typical results being around 20% brighter than the zoom method. It works like this: by using all of the pixels you increase light output from the projector by about 33% (since you are using 33% more pixels to draw the image). However, about 3 - 5% of the added brightness is lost by passing it through the extra glass of the anamorphic lens. That leaves around a 30% net gain. As some have pointed out, though, opening up the projector lens for the zoom method also increases light output of the projector. That is why its safer to expect about a 20% increase in brightness using an anamorphic lens in typical setups compared to zoom, all things being equal.
As much as I'd love to be able to recommend the CineVista, and as much as it would help resolve your brightness issue, the truth is that your proposed projector location is well outside the recommended focus range of the lens itself. Sixteen foot back is about the maximum I would recommend for projector placement when paired with the CineVista. Further than that then focus will suffer. If I understand you correctly, that is simply not possible. That means you will need to look at the Panamorph UH480, which can be adapted to work at that throw. However, your price more than doubles. On the positive side, the 480 has no chromatic aberration so is a superior lens (plus can be upgraded to add a manual or motorized transport at a later date).
With an anamorphic lens you *may* be able to get away with the 166" 1.3 gain screen and the Sony. I personally run a JVC HD750 with a 144" Stewart StudioTek 130 and it is just bright enough using our DC1 lens. As you noted, the Sony is brighter, so you might be ok. The main thing to keep in mind - as others have pointed out - is that projector bulbs dim over time, so I always recommend buying a couple of spares and swapping out when the bulb starts to dim noticeably. Some people don't notice the dimming at all (since it happens gradually over a fairly lengthy period of time) while others notice it pretty quickly.
Right now, the safest and least expensive setup would be the JVC using auto-zoom on the smaller screen. The best way to get what you really want is the Sony with a lens, but unfortunately not the CineVista (unless you can move the projector about 5 or 6 ft closer to the screen).
Lastly, don't forget that light control also means a dark colored ceiling and walls when you are talking about a white screen. Otherwise you will get some pretty severe washout from the room itself.