tamron vs sigma vs pentax on lens

Started May 12, 2011 | Discussions thread
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kentokun12
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tamron vs sigma vs pentax on lens
May 12, 2011

Anyone compared Pentax DA 55-300 mm
and Tamron AF 70-300mm and Sigma 70-300mm.

I have Pentax DA 55-300mm but I am thinking about getting the 70-300 that has macro. Anyone has any experience with these?

Are Tamron or Sigma better than Pentax? Is the Macro capability worth Tamron and Sigma?

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