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ccougar
Apprentice
since ‎10-29-2014
‎10-29-2014

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Lens (Extender) Question

10-29-2014
Would any benefit be gained by using a series III extender (x1.4 or x2.0) on a series I lens opposed to a series II extender - specifically an EF 500mm f/4 IS USM?
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