
Projection Distance and Size
Use the figures, tables, and formulas below to determine the projection size and projection distance. (Projection sizes are approximate values for 
  | 
  | projection  | projection distance a (m)  | height (H)  | |||
Screen  | As seen from above | (cm)  | |||||
size  | min length  | max length  | |||||
min length  | max length  | ||||||
  | 
  | (inches)  | (zooming max)  | (zooming min)  | (zooming max)  | (zooming min)  | |
  | 
  | 
  | |||||
  | 
  | 40  | 1.6  | 1.8  | 8.7  | 8.8  | |
90°  | 
  | 60  | 2.3  | 2.8  | 12.5  | 13.1  | |
  | 80  | 3.1  | 3.7  | 16.8  | 17.3  | ||
  | 
  | 100  | 4  | 4.7  | 21.7  | 21.9  | |
  | 
  | 150  | 6  | 7.3  | 32.5  | 32.9  | |
  | 
  | 200  | 8  | 9.4  | 41.9  | 43.9  | |
  | 
  | 250  | 10  | 11.7  | 52.4  | 54.8  | |
  | 
  | 300  | 12  | 14.1  | 65  | 65.8  | |
  | 
  | projection  | projection distance a (inch)  | height (H)  | |||
  | As seen from the side | (inch)  | |||||
  | size  | min length  | max length  | ||||
  | min length  | max length  | |||||
  | 
  | (inches)  | (zooming max)  | (zooming min)  | (zooming max)  | (zooming min)  | |
  | 
  | 
  | |||||
  | 
  | 40  | 63  | 71  | 3  | 3  | |
  | Lens center  | 60  | 91  | 110  | 5  | 5  | |
  | 80  | 120  | 150  | 7  | 7  | ||
  | 
  | 100  | 160  | 190  | 9  | 9  | |
  | 
  | 150  | 240  | 290  | 13  | 13  | |
H  | 
  | 200  | 320  | 370  | 16  | 17  | |
  | 250  | 390  | 460  | 21  | 22  | ||
90°  | 
  | 300  | 470  | 560  | 26  | 26  | |
  | a  | 1 inch=2.54 cm  | 
  | 
  | 
  | ||
Preparations
a is the distance between the lens and the screen, and corresponds to a range of 1.6m to 14.1m (63.0 inches to 560.0 inches). H is the height from the image bottom to the center of the lens.
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