Bildwinkel


Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102

Strict Standards: Non-static method MagicWord::get() should not be called statically, assuming $this from incompatible context in /var/www/clients/client4/web9/web/includes/Parser.php on line 2102
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Der Bildwinkel eines Objektives ist von dessen Brennweite und der Bilddiagonale des Sensors bzw. des Filmes abhängig. Insoferne wäre beim Vergleich von Objektiven der erzielbare Bildwinkel bei gegebener Sensorgröße wichtiger, als die Angabe der Brennweite. Der Bildwinkel lässt sich außer bei Fisheye-Objektiven, die andere Abbildungscharakteristika haben, leicht aus diesen Größen berechnen. In folgender Abbildung bezeichnet d die Bilddiagonale (z.B. 21.6 mm bei FourThirds), f die Brennweite des Objektivs und α den Bildwinkel unter der vereinfachenden Annahme, daß die Gegenstandsweite Unendlich, die Bildweite also gleich der Brennweite ist:

Bild:Bildwinkel.png

Betrachtet man das obere, rechtwinklige Dreieck, so gilt dort die Beziehung
\frac {d} {2} = f \cdot \tan \left( \frac {\alpha} {2} \right)
Für das Gesamtdreieck folgt daraus für den Bildwinkel α in Grad die Formel:

\alpha = 2 \cdot\arctan \left( \frac {d} {2f} \right)

Entgegen der landläufigen Meinung ist der Bildwinkel nicht bestimmend für die perspektivische Tiefe des Bildes. Es gibt zwar eine "typische Weitwinkel- oder Teleperspektive", diese resultiert aber allein aus dem jeweiligen Abstand zum Objekt bzw. den Objekten, nicht aus dem Bildwinkel oder gar der Brennweite.

Einige Beispiele

In der folgenden Tabelle sind die Bildwinkel für einige beispielhafte Brennweiten aufgeführt.

Brennweite Bildwinkel für
Minox
8x11mm
d=13.6mm
FourThirds
13x17.3mm
d=21.6mm
Canon APS-C
15x22.5mm
d=27mm
Nikon
15.6x23.7mm
d=28.4mm
Canon 1D
28.7x19.1mm
d=34.5mm
Kleinbild
24x36mm
d=43.2mm
Mittelformat
56x56mm
d=79.2mm
Mittelformat
56x89mm
d=105.2mm
Großformat
18x24cm
d=300mm
f=7mm 88.3° 114.1° 125.2° 127.5° 135.8° 144.1° 160.0° 164.8° 174.7°
f=11mm 63.4° 88.9° 101.7° 104.5° 115.0° 126.0° 149.0° 156.4° 171.6°
f=14mm 51.8° 75.3° 87.9° 90.8° 101.9° 114.1° 141.1° 150.2° 169.3°
f=22mm 34.4° 52.3° 63.1° 65.7° 76.2° 88.9° 121.9° 134.6° 163.3°
f=35mm 22.0° 34.3° 42.2° 44.2° 52.5° 63.4° 97.1° 112.7° 153.7°
f=50mm 15.5° 24.4° 30.2° 31.7° 38.1° 46.7° 76.8° 92.9° 143.1°
f=54mm 14.4° 22.6° 28.1° 29.5° 35.4° 43.6° 72.5° 88.5° 140.4°
f=100mm 7.8° 12.3° 15.4° 16.2° 19.6° 24.4° 43.2° 55.5° 112.6°
f=150mm 5.2° 8.2° 10.3° 10.8° 13.1° 16.4° 29.6° 38.6° 90.0°
f=200mm 3.9° 6.2° 7.7° 8.1° 9.9° 12.3° 22.4° 29.5° 73.7°
f=300mm 2.6° 4.1° 5.2° 5.4° 6.6° 8.2° 15.0° 19.9° 53.1°

In dieser Tabelle ist leicht ersichtlich, dass für denselben Bildwinkel von ca. 90° bei Four Thirds eine Brennweite von 11 mm, bei Kleinbild von 22 mm notwendig ist. Dies veranschaulicht den so genannten Cropfaktor, der zwischen Four Thirds und Kleinbild den Faktor von ca. 2 hat.


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