Tokina 400mm f/5.6 AT-X - opinions???

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Tokina 400mm f/5.6 AT-X - opinions???
7 months ago

Regarding the AF version of this lense, how does this rate as a telephoto option for Pentax? I know the Sigma 400mm telemacro is coveted, and the non macro versions are not very sharp, so I was wondering how the Tokina stacked up against those lenses?

Existing info online is sparse...

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Pentax K5
Sigma 8-16 f/4.5-5.6 DC HSM
Pentax SMCP-DA 40 f/2.8 ED Limited Edition
Pentax D-FA 100 f/2.8 Macro WR
Sigma 170-500 5-6.3 Apo Asph F/px-af

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