EOS diff between old 300 IS 2.8 and new 300 IS 2.8

[Mehrdad Sadat]

What is the difference between the old 300/2.8 IS and the new one,

1) optics?
2) construction
3) weight
4) material used


how can you tell them apart?




Appreciate all the info


_____________________________________
Thanks, Mehrdad 


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