Camera Y Film Tecnique Essay

694 words - 3 pages

Aufbaubeschreibung Aufbau Kamera mit AudioAufbau einer KameraAufbau eines WechselobjektivEin Objektiv besteht aus mehreren verschiedenen Linsen, welche in einer bestimmten Art miteinander kombiniert sind. Einzelne Linsen und miteinander verbunden Linsen, nennt man (Linsen-) Gruppe oder Glied. Objektive aus 7 Linsen, bei der zwei miteinander verkittet, bestehen also aus 6 Gliedern. Kombinationen von Linsen werden verwendet, um unterschiedliche Glassorten miteinander zu kombinieren. Die einfachsten Objektivkonstruktionen bestehen aus drei Gliedern, daher auch die Bezeichnung Triplet. Dabei können aber durchaus bis zu 6 Linsen verwendet werden.Verschiedene Objektive:Normalobjektiv, Weitwinkel, Fischauge, Teleobjektiv, Makro-ObjektivAuswirkung der Sensorgröße auf das BildJe ...view middle of the document...

verlängert die Verschlusszeit des Bildes. Dadurch ist es möglich, die Blende trotz Sonnenschein komplett zu öffnen, und einen Schärfe/Unschärfe Effekt zu erzeugen. Dies ist nötig, um Bilder Dynamischer mit Vorder und Hintergrund zu gestalten.Großes Loch = scharfer Vodergrund, unscharfer Hintergrund oder unscharfer Vordergrund, scharfer Hintergrund.Kleines Loch für schnelle Objekte =Verschlusszeit verkürzen → weniger Zeit für Licht auf Chip = schärferVerschlusszeit verlängern → mehr Zeit für Licht auf Chip = verschwommenerIdentifizieren eines Problems und vorschlagen von LösungsansätzenGrundkenntnisse über verwendete CodexAls Codec bezeichnet man ein Verfahren, das Daten oder Signale digital kodiert und dekodiert.Der Kodiervorgang wird meist nicht Verlustfrei durchgeführt. Durch die Datenkompression kann es zu Qualitätsminderung, Ton und Video- Qualitätssenkung und zu Problemen bei der Wiedergabe kommen.h.264 ist ein ziemlicher Basic Codec.Die meist verwendeten Codecs sind MPEG 1 und MPEG 2. Sie sind nötig um eine CD oder DVD herzustellen, die in einem DVD-Player abspielbar ist.MPEG 4 ist eine Weiterentwicklung des MPEG 2 Standards und speziell für sehr niedrige Datenraten entwickelt. Zusätzlich bietet dieses Format gute Voraussetzungen für interaktive Medieninhalte.Aufbau für eine Chromakey-SituationDieser Ansatz basiert darauf, einen Farbton (die Schlüsselfarbe, den key) auf einem Farbraum auszuwählen. Zusätzlich können Toleranzen für ähnliche Farbtöne definiert werden. Voraussetzung für den Chroma Key ist somit ein einfarbiger Hintergrund wie der Blue- oder Greenscreen. Typische Anwendung ist der Fernseh-Moderator vor einer Wetterkarte.

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