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Sep 21 2007

Inponderabilitate

Published by Zet at 11:43 am under Photography

Canon EOS 400D, 50mm, f/2.8, 1/1600 sec., ISO-100

Ce vezi si ce este?

Ce vezi este un jet continuu de apa. Ce este sunt stropi ce se misca in aceeasi directie cu rapididate, astfel incat ochiul percepe o miscare continua care este.

Pentru a “ingheta” apa in miscare este nevoie de un timp de expunere de cel putin 1/640, uneori si mai mic, depinde de rapiditatea cu care apa se misca. Nu exista o reteta aici, doar trial and error. Ca regula, cu cat timpul de expunere este mai mic, cu atat stropi ce se formeaza apar mai clari. Cu cat e mai rapida lentila cu atat mai bine.

Rapiditatea lentilei este data de marimea diafragmei. De ce? Cu cat diafragma este mai mare (f1.2 de exemplu) cu atat iti poti permite timpi de expunere mai mici 1/1600, 1/2500, etc ==> “rapiditatea” lentilei.

In cazul de fata, poza a fost facut cu o lentila primara de 50mm f1.4 cu deschiderea f2.8, ceea ce mi-a permis un timp de expunere de 1/1600 fara ca rezultatul sa fie subexpus.

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2 responses so far

2 Responses to “Inponderabilitate”

  1. ghoston 21 Jun 2008 at 8:37 pm

    word!

  2. starchaseron 06 Mar 2010 at 10:26 pm

    invata sa scrii, despre “inponderabilitate” sau “Ce este sunt”

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