Differences

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--- doc:appunti:hardware:olympus-e-m10:pergear_fisheye [2022/12/19 16:49] – [The Pergear 7.5mm F2.8 Fish-Eye] niccolo
+++ doc:appunti:hardware:olympus-e-m10:pergear_fisheye [2022/12/20 09:40] (current) – [Lens-flare] niccolo
@@ Line 45: / Line 45: @@
 {{pergear-sun-flares.jpg?360|Lens-flare ed effetto stella contro sole}}
 {{pergear-light-flares.jpg?360|Lens-flare ed effetto stella con faretto alogeno}}
+===== Aberrazione cromatica =====
+Una lente in generale può essere affetta da due tipi di [[wp>Chromatic_aberration|aberrazione cromatica]], assiale e laterale (o trasversale):
+  * **Axial chromatic aberration**: different wavelengths of light are focused at different distances from the lens.
+    * Typical at long focal lengths.
+    * Occurs throughout the image.
+    * It is reduced by stopping down (due the augmented depth of field).
+    * Difficult to remedy in post-processing.
+  * **Transverse chromatic aberration**: different wavelengths are focused at different positions in the focal plane.
+    * Typical at short focal lengths.
+    * Increases towards the edge.
+    * Tt is not affected by stopping down.
+    * Can be corrected by radially scaling the RGB planes appropriately so they line up.
+FIXME: Vediamo quanto incide l'aberrazione cromatica laterale e quanto è possibile correggerla in postproduzione.
 ===== Third party lens manufacturer =====