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I have an old 46 inch set that I want to replace with an hdtv. Trying to decide if 50 inch widescreen will look too small. Can someone give me the actual dimensions of a 50 and 55 inch screen. I want to cut out a piece of cardboard to see what it looks like for 12 feet. Btw...I am leaning towards the sony 50a10 but the 55a20 looks so much bigger .
 

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This is a little geeky, but when I was shopping I put a spreadsheet together that takes a 16:9 TV diagonal and computes its height, width and area, and also computes the same measurements for the 4:3 screen area it would display SD content on in a non-zoomed mode. In your case, if you want to have a 4:3 window as large as your old set, you would want the 55". OTOH, if you're watching widescreen, or a mode that uses the entire screen, the 50" 16:9 will be just a tad larger than your old set.

Code:
Code:
16 diag 16 h    16w     43 h    43 w    43 diag 16 area 43 area
30      14.71   26.15   14.71   19.61   24.51   384.57  288.43
31      15.20   27.02   15.20   20.26   25.33   410.64  307.98
32      15.69   27.89   15.69   20.92   26.15   437.55  328.17
33      16.18   28.76   16.18   21.57   26.96   465.33  349.00
34      16.67   29.63   16.67   22.23   27.78   493.96  370.47
35      17.16   30.51   17.16   22.88   28.60   523.44  392.58
36      17.65   31.38   17.65   23.53   29.42   553.78  415.34
37      18.14   32.25   18.14   24.19   30.23   584.97  438.73
38      18.63   33.12   18.63   24.84   31.05   617.02  462.77
39      19.12   33.99   19.12   25.49   31.87   649.92  487.44
40      19.61   34.86   19.61   26.15   32.68   683.68  512.76
41      20.10   35.73   20.10   26.80   33.50   718.29  538.72
42      20.59   36.61   20.59   27.45   34.32   753.76  565.32
43      21.08   37.48   21.08   28.11   35.14   790.08  592.56
44      21.57   38.35   21.57   28.76   35.95   827.25  620.44
45      22.06   39.22   22.06   29.42   36.77   865.28  648.96
46      22.55   40.09   22.55   30.07   37.59   904.17  678.12
47      23.04   40.96   23.04   30.72   38.40   943.91  707.93
48      23.53   41.84   23.53   31.38   39.22   984.50  738.37
49      24.02   42.71   24.02   32.03   40.04   1025.95 769.46
50      24.51   43.58   24.51   32.68   40.86   1068.25 801.19
51      25.00   44.45   25.00   33.34   41.67   1111.41 833.55
52      25.49   45.32   25.49   33.99   42.49   1155.42 866.56
53      25.98   46.19   25.98   34.65   43.31   1200.28 900.21
54      26.47   47.07   26.47   35.30   44.12   1246.01 934.50
55      26.96   47.94   26.96   35.95   44.94   1292.58 969.44
56      27.45   48.81   27.45   36.61   45.76   1340.01 1005.01
57      27.94   49.68   27.94   37.26   46.57   1388.30 1041.22
58      28.44   50.55   28.44   37.91   47.39   1437.44 1078.08
59      28.93   51.42   28.93   38.57   48.21   1487.43 1115.57
60      29.42   52.29   29.42   39.22   49.03   1538.28 1153.71
 
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