Focal lenght and Blender camera units

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mario
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Location: Carbonia(Sardinia Italy)

Focal lenght and Blender camera units

Post by mario » Sat May 26, 2007 2:17 am

What's the relationship between digital camera's focal lenght and Blender camera units? (example: 5 mm in camera focal lenght in Blender is......?)
Thanks to all
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StompinTom
Indigo 100
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Post by StompinTom » Sat May 26, 2007 3:42 am

5 mm.
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StompinTom
Indigo 100
Posts: 1828
Joined: Mon Sep 04, 2006 3:33 pm

Post by StompinTom » Sat May 26, 2007 3:43 am

the focal length has to do with the cameras viewing angle and has no spatial properties.
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Kram1032
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Location: Austria near Vienna

Post by Kram1032 » Sat May 26, 2007 9:00 pm

it's a different value, insteaqd of degree...

I don't remember the formula, but it's kinda the double tanh of the angle, or so....
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StompinTom
Indigo 100
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Joined: Mon Sep 04, 2006 3:33 pm

Post by StompinTom » Sun May 27, 2007 3:41 pm

yeah but the viewing angle is directly related to the focal length. and its a bit more complex than double the viewing angle.
it doesnt matter what the blender units are because it has no effect on 'blender space' whatsoever.
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