Originally Posted by dnoyeB
Lights off is excellent. ...Im having a tough time with grey.
Well. Maybe a professional photographer can enlighten us. (pardon the pun)
There is a thing about color temperature that can change the story between what screen to use with the right combination of on screen projected lighting and ambient lighting and such.
I could only imagine that if a screen isn't completely "light balanced" then any illuminated/projected image thrown onto the surface could be good but not as accurate as the projector, projecting this image. That being said, screen choices are not something to decide on to better an image: rather what screen to purchase to minimize degradation.
As for an example noted before. A grey screen can be good at minimizing reflecting ambient light therby retaining a better contrast level. If your application demands it. etc.
So one would think. The best tests for ultimate picture would be to test for no ambient light in the room at all. It's a no brainer that any projector/ screen can look better with the lights totally off. If your application is with a little more every day use, you might likely end up with some ambient light to function around the room better.
Even having no ambient light in the room is not fully possible. The sheer light thrown from the projector, reflected off the screen and onto a few walls can also raise the ambient light as well. Unless you had special walls that absorbed lighting better such as a textured matt-black surface.
A question I might ask is. How much ambient lighting is average for the average user while watching something on their front projector?
I'd figure about 30-50% lighting as tested above. I say that because it could allow most to find their way out of and back to their chair without tripping over something. It could allow better overall functionality like to converse with the person next to you while visiting or reading something. Even if it's just to read the buttons on your remote or to find the right remote off the coffee table.
So at what lumens could this theoretical 30-50% lighting level be?
What projector could sku these tests?
And with this info, what screen to base this off of would best operate during this environment the best? Concidering that this lighing situation could likely be the most widely used.
That's probably why the gray screens are popular now that the projectors can keep up.
However, my application is where there is a bit of ambient light. I like to entertain and most of the time I have friends over when I use the screen. I have a bit of lights on to converse and walk about the room if necessary. You know? to go grab another beer and such.
Because of the broader seating angle, less color shift, no sparklies, and overall good pic for a DLP projector I use a matte white Day-Lite.
If I want to use it during the day with the drapes open, I should get a grey screen. If I want to impress the visitors with best contrast and all, it's lights out!(totally). This also goes without saying that for each lighting situation your settings on your projector system could use a little tweaking to maximize each application.
I'm curious if anyone would care to use their light meter for such a test?