Fotocamera > Obiettivi

Contrassegni obiettivo

Scoprite cosa significano i numeri sull'obiettivo.

Obiettivo SAMSUNG 18-200mm F3.5-6.3 ED OIS (esempio)

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N.Descrizione

Valore di apertura

1 Una gamma di valori di apertura supportati. Ad esempio, 1:3.5–6.3 indica l'intervallo di apertura da 3,5 a 6,3.

Lunghezza focale

La distanza dal centro dell'obiettivo al punto focale (in millimetri). Questo

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dato è espresso in una gamma: da lunghezza focale minima a lunghezza

focale massima dell'obiettivo.

 

 

Lunghezze focali maggiori riducono le angolature e ingrandiscono il

 

soggetto. Lunghezze focali minori determinano angolature più ampie.

 

 

 

ED

 

ED significa Extra-low Dispersion. Il vetro a dispersione molto bassa è

3efficace per ridurre l'aberrazione cromatica (una distorsione che si verifica quando un obiettivo non riesce a mettere a fuoco tutti i colori allo stesso punto di convergenza).

OIS (pag. 109)

4Stabilizzazione ottica delle immagini. Gli obiettivi con questa funzione possono rilevare l'oscillazione della fotocamera e annullare efficacemente il movimento all'interno della fotocamera.

Ø

5Indica il diametro dell'obiettivo. Quando collegate un filtro all'obiettivo, accertatevi che i diametri dell'obiettivo e del filtro siano uguali.

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Samsung EV-NX1ZZZBZBTR Contrassegni obiettivo, Valore di apertura, Lunghezza focale, OIS pag, Focale massima dellobiettivo
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