Replacing Tamron 17-50 by 18-70 or Sigma 18-50 macro?

Started May 2, 2007 | Discussions thread
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Edmond Wong
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Replacing Tamron 17-50 by 18-70 or Sigma 18-50 macro?
May 2, 2007

My Tamron 17-50 F2.8 has the below problems:

  • overexposure in flash photos;

  • occasionally mis-focus;

  • strong field curvature (making objects at both sides blurred)

I am going to replace it by either the Nikkor 18-70 or the Sigma 18-50 F2.8 macro.

If you were I, which will you choose?

Rgds,
Edmond

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