Intro-to-Photo-presention-20112

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J J A d i f f e r e nc e o f 1 s t op i s a dou b l i ng or h a l v i ng o f t h e l i gh t ma k i ng t h e i mag e J J T h e amou n t o f l i gh t t h a t s t r i k e s t h e f i l m / ch i p i s me a s u r e d i n s t op s and i s a l s o k nown a s e x po s u r e va l u e ( E v ) J J A s t op i s u s e d t o me a s u r e t h e d i f f e r e nc e s i n E v o f a p e r t u r e s , s h u t t e r s p e e d s and f i l m s p e e d s J J “ F a s t ” me an s t h e came r a can e x po s e a p ho t o qu i c k l y

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