Originally Posted by chhanthony
At first I plan to bluy SI Black Diamond or DNP, but both of them need 1.5 throw ratio at least.
I am using 126" white screen now and using max zoom (1.2) throw ratio.
I would say my living not the bat cave , but have quite good light control.
I wish to use ALR screen to improve the black level, but I am not sure will ALR screen will work fine in my place with 1.2 throw ratio which is in the middle of UST and normal ALR scree.
May be I have to consider normal grey screen.
My problem is screen too big but the distance is to short!
So that my choice on projector is very limited, luckily I found this HU70LA, all its performances is very acceptable to me, except the black level and contrast which I wish to improve.
Treating the walls for reflections is one of the best upgrades that can be done projector wise.
And cheaper versus getting an expensive ALR screen, which can have artifacts.
This what a Cinegrey 3D ALR looks like on a 1.15x throw. The hotspot is even present at 1.5x.
There are no intermediary ALR's between regular ALR's and UST ALR's.
This type of ALR is called angular, and it does exactly what is says, it reflects the projector beam at an equal angle.
Think of this surface like a mirror. If the projector is too close the reflection will hit the floor.
It's also why they have to be further away. The part of the projected image that is at the periphery will also be reflected at an equal angle, somewhere on the walls. The further away it is, the more the picture edge reflection will be towards the viewer.
Read this post but also the entire thread on ALR/grey/white screens:
The sound and vision articles linked above are a worthwhile read for ALR screens. In them another type of ALR is mentioned, retro reflective, which send the image to the same place where it originated from. These screens don't have hotspots, but are harder to find and more expensive.
Why the HU70LA?
There are other brighter options which would have worked better with a grey screen for example.