Zacytuję Boba Atkins'a:Zamieszczone przez Marfackib
"The shorter the focal length, the wider the angle of view for any given negative/sensor size and any rectilinear (non-fisheye) lens. Period. There's no wiggle room here, it's a basic fact of optics.
When you read angle of view figures you have to make sure you know what they are. Sometimes they are the diagonal field of view, sometimes they are the horizontal field of view."
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