Sigma / Tamron
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28-10-10, 10:17 PM
Join Date: Sep 2010
No idea with regard to whether the glueing together of lenses, is true or not. The only thing that I would say is that servicing a lens that's been glued together, would be somewhat problematic to say the least, so I would be surprised if either were.
Without knowing what specific lenses you were considering/comparing, its impossible to give an answer. In general OEM lenses tend to be superior optically and mechanically than 3rd party lenses, which is reflected in the prices charged.
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