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What's the angle of view in square format?

Discussion in 'Open Discussion' started by WT21, Dec 3, 2012.

  1. WT21

    WT21 Mu-43 Hall of Famer

    Feb 19, 2010
    Boston
    I am just wondering if anyone would know how to calculate (or if you could calc for me :biggrin:) the horizontal AOV (and maybe also the diagonal) for a panasonic 20mm lens if shooting in 1:1/6:6/square format.
     
  2. billy_pilgrim

    billy_pilgrim Mu-43 Regular

    39
    Jul 6, 2011
    From wikipedia, the formula is 2 * arctan ( sensor size / 2 * focal length) (that's in radians also). The m4/3 total diagonal is 21.6mm, but cropped to 1:1, it's just sqrt(13^2 + 13^2) = 18.4mm. So normally we get a diagonal AoV of 56.7 degrees, and 36 degrees vertical, and so 36 degrees is also the horizontal angle for a square crop, and for the diagonal for the square crop we get 49.4 degrees.
     
  3. WT21

    WT21 Mu-43 Hall of Famer

    Feb 19, 2010
    Boston
    Thanks. Stupid me! The new horizontal aov would the same as the current vertical. Duh!

    Thanks so much