Originally Posted by netjack
16 Ft Throw 14 Ft seating (no changes allowed)
L shaped room
No changing wall colors
This is the picture of the setup. Wife aggro means this thing is fixed in one spot and she hates that she lost her windows. Walls are beige in color and being re-painted as we speak. Ambient light isn't too bad at night (picture makes it look a lot brighter than it really is). Excuse the mess.
To avoid hotspots and sparkles the projector would need to be placed as far back as possible.
ALR's generally have a minimum recommended throw of 1.5x or higher, but to avoid artifacts the throw should be 1.8x or higher.
With 16' (from lens to screen) and an 120" screen in 16:9 format the throw ratio is 1.83x.
For an 125" it's 1.76x.
The hotspot/sparkle are most visible when a bright/close to white image is projected. The brightness of the projector plays a factor in this as well.
It's unclear how much, if any an ALR fabric will hotspot/sparkle.
The Slate 1.2 and 0.8 are said to be similar to Cinegrey 3D or 5D. The 0.8 and 5D are more aggressive and are more likely to have visual artifacts.
Originally Posted by bdht
1.4 for the jvc 1.5 for the w1070
Yes. at this throw ratio to get rid of the hotspot would take a dalite parallax Pure 0.8/dnp supernova 08-85, evp darkstar9. Possibly elunevisions Aurora ALR (and others) fixed frame material though i dont have a sample.
It's difficult to determine how much the image will be affected by artifacts just with samples.
Some of these fabrics are similar to the XY Black Crystal 0.8 which has some hotspot and sparkle at 1.5x.
If you're going to go the ALR route, select a material that has less ambient light rejecting/resisting properties.
A FireHawk G4 has a minimum recommended throw of 1.3x. The Cinegrey 3D 1.5x. Elunevision Aurora 1.2x.
You could try a XY Black Crystal 0.8 since it's relatively inexpensive compared to the others.
Besides the fabric, the other components of a screen can also be of varying quality and contribute to the price.