Hi Bill H,

Regarding the Sigma APO 170-500mm F5-6.3 DG, I'd say consider the Sigma
50-500mm F4-6.3 APO EX DG HSM or 80-400mm F4.5-5.6 APO EX OS instead. Both
are much better lenses IMHO - and in the opion of many reviewers.

Cheers

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"Bill H." wrote in message
...

Which of these would you spend your money on?
Tamron SP AF200-500mm F/5-6.3 Di LD (IF) or Sigma APO 170-500mm F5-6.3 DG