Originally Posted by coderguy
It's hard to quantify, but if I do my best...
Just to put some perspective on this
I've had projectors in about 7 different rooms over the years, including JVC and DLP's right next to each other.
So I've watched these for thousands of hours in different rooms, including perfect bat caves vs small rooms with white walls to everything between.
I would say because some scenes in movies go so ridiculously dark, there is no real limit, but then how much is worth it isn't really possible to answer, just depends on each individual's tastes.
For instance, there are plenty of scenes where a guy is just walking around in dark clothes in almost total pitch black right before he gets AXE'd near a barn.
You're going to see the difference in any room in that type of scene.
If you were to watch something like the scene of an Earth panning in space, you're not going to see as much difference, but you'll notice it before it gets too much coverage on the scene.
This is where the ANSI contrast kills the image in a white room, such as if there is too much bright light in the scene.
For starfield type scenes, well they are still going to look much much better on the higher CR projector, regardless of the room.
Unless the starfield scene just has some bright nebula or planet in it (or a sun obviously)...
How much difference, anything from almost as much as in a perfect room, to about half as much.
The contrast won't measure nearly as high with a meter, but things are all relative, your eyes will still pick up the difference.
The problem is the white light reflecting off the wall from any given scene, but in darker scenes that because more normalized (to a degree at least).
That is me trying to quantify it based on experience, but your results may vary due to your precise room conditions.
Thank you for the input.
Sorry if I'm beating a dead horse. I know it's difficult trying to estimate these things, just trying to see what direction I should take equipment wise.
That sounds really encouraging, but what about the measurements taken by the PD article?
In the graphs with the TW9200 and VW520ES there are two points between 0 and 5% ADL. I assume these are 1 and 2% (?).
In a room with white walls, the TW9200 seems to stall at around 2000:1 CR for 1% ADL and 1200:1 CR for 2%.
The VW520ES seems to stall at around 3000:1 CR for 1% ADL and 1600:1 CR for 2%.
I remember reading that CR above 4000:1 are more difficult to observe than under that value.
I assume these are native contrast values. The article does not say anything about the use of an iris, or the dimming function on the W1070.
Since the HT3050 has ~4500:1 CR with the lamp dimming, would it behave in a similar fashion the TW9200 without the iris (as in the graph) at 1 and 2% ADL?
Or would a cheaper projector with an iris like the HC3200/HT3550 with iris have similar results as the VW520ES without one?
And all of these measurements were taken on I assume a 1.0 white screen, and some kind of grey/ALR paint would help?
The ADL where the shadows are grey is probably around 1-2%, which I understand where the iris helps the most.
In this post, this picture is 2.96% ADL:
This would be the upper limit of where the improvements should take place.