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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 Super Moderator Subscribing Member

    Feb 19, 2010
    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

    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 Super Moderator Subscribing Member

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

    Thanks so much
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