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Other than Di-II Lens Series, all Tamrons AF lenses for Nikon and Pentax are equipped with an aperture control ring, but Di-II lenses do not have the ring. Why is that?

April 26, 2017af aperture equipped Lens lenses nikon pentax SERIES tamron

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Other than Di-II Lens Series, all Tamrons AF lenses for Nikon and Pentax are equipped with an aperture control ring, but Di-II lenses do not have the ring. Why is that?

1 Answer

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Posted

Di-II Lens Series are for exclusive use with digital SLR cameras. All Nikon and Pentax digital SLRs are designed to control apertures with a dial on the camera, not with a control ring on the lens. An aperture control ring is unnecessary for AF lenses designed for exclusive use on digital SLR cameras.