Ｐａｇｅ 138937 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 通常モードに戻る ┃ ＩＮＤＥＸ ┃ ≪前へ │ 次へ≫ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▼What to watch Expos elkameer 2010/01/22(金) 08:04 ─────────────────────────────────────── ■題名 ： What to watch Expos ■名前 ： elkameer <elkamoorston@gmail.com> ■日付 ： 2010/01/22(金) 08:04 ■Ｗｅｂ ： http://www.jouwdesign.com -------------------------------------------------------------------------
| This scale has essentially no theoretical limits. It can be as long as days and be fractions of a millionth of a second. For really long exposures we simply hold the shutter open. For extremely brief exposures shorter than can be given by shutters we have to rely on brief flashes of light from flash-units: even in small cameras, the exposure time can be as short as 1/10,000 sec or shorter. In normal photography we generally work between about 1/30sec and 1/2000sec. Ah! it痴 that pesky forward slash again: here we池e dividing our shutter setting into 1: which is why photography professors call this measure 途eciprocal seconds. One second is 1/1 one divided by one equals one, giving us a pretty long exposure. 1/10 is one second divided by ten parts, so each is a tenth of a second long. 1/1000 is one second divided into a thousand parts, so each is a very brief one-thousandth of a second slice of time. Of course in stills photography, we only take one slice at a time. 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