The calculator is based on guidance that the ratio of throw distance to UltraWide screen width should be at least 1.6:1. Use the slider to show your throw distance and the calculator will give you the maximum screen size. Or, use the slider to show your screen size and the tool will give you the minimum throw distance. Using a lens at a throw distance range shown as deep red is also not recommended.
What happens when the ratio of throw distance to UltraWide screen width is 1.6:1 or below?
First, a low ratio means a more severely expanding beam that might be cut off by the lens, which will make corners of the image fade in brightness. Second, projector ECC may not be able to fully compensate for color fringing designed into the Phoenix lens. Third, geometric distortion (“pincushion” with Phoenix, “barrel” with Paladin) is entirely based on the throw ratio. Here’s what to expect at different UltraWide throw ratios:
2.0:1 or higher: Geometric distortion is almost non-existent even at the edges.
1.8:1 – 2.0:1: Very minor edge distortion.
1.6:1 – 1.8:1: Edge distortion can be easily masked by the screen border but is still very difficult to see in the image.
Below 1.6:1: Even with the edge distortion masked off, distortion also starts to be visible toward the perimeter of actual images. Nonetheless, many home theaters have ratios down to about 1.5:1 realizing that some geometric distortion will be visible (ie buildings may not have straight edges at the periphery of the image). It is minor, but still somewhat noticeable, just kike the distortion sometimes seen in many films from the camera lenses.
Note: the above distortion is only from the anamorphic lens. A curved screen will also add barrel distortion at the top and bottom of the image which will add to any barrel distortion from a Paladin lens or will subtract from any pincushion distortion from Phoenix lens.