Questions about lens size. (Ex. 200mm/300mm lens)


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Feb 13, 2010
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Ok I have attended some physics lessons and I sort of know how these stuff works, But can anyone just tell me more about the differences in the lens? I cant understand some of the technical terms... well technically im a newbie but its frustating. (K-x w/ DAL 18-55 + DAL 50-200) <--- something like these. What does it means? :embrass:
 

Octarine

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Pasir Ris
#2
Feb 13, 2010
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Woodlands.
#3
Thank you for even taking your time to reply to me. I really should have search more in the forum before asking questions.. Thanks again. Cheers!
 

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