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J J I t i s me a s u r e d i n va l u e s u s i ng an I n t e r na t i ona l Organ i z a t i on s o f S t anda r d s ( I S O ) n umb e r . U s e d t o b e me a s u r e d i n Ame r i can S t anda r d s A s s oc i a t i on s ( A S A ) n umb e r s J J F i l m s p e e d i s a me a s u r e o f t h e s e n s i t i v i t y o f t h e f i l m or s e n s or i n a came r a .
J J I S O n umb e r s a r e u s e d i n bo t h f i l m and d i g i t a l came r a s
T i p s and t e ch n i qu e s f o r b e t t e r p ho t og r a p h y
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