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Sigma 120-400 Apo OS HSM Slow auto focus

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Published on Jul 2, 2010

my sigma 120-400 has really slow autofocus and makes weird sounds while focusing if you have an idea why its like this please leave me a comment.

the lens is mounted on a Nikon D40
batteries are fully charged

mein sigma 120-400er objektiv fokusiert sehr langsam und macht komische geräusche beim fokusieren (leises quitschen)

KAmera NIkon D40
Bildstabilisator ist aus
Batterien sind voll

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