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Nikon 70-200/2.8 VR II and 70-200/4 VR
Nikon 70-200/2.8 VR II and 70-200/4 VR

Comparison: Focus Shift at Close Range

This is a close range test at a reproduction ratio of about 1:12, equivalent to a tight head and shoulders portrait. Using the Nikon D800E in FX (full frame mode).

Focus accuracy

At 200mm, the margin of error for focus here is about ±2mm at ƒ/4, a fact evident simply by viewing the ruler (on which a marked 1cm corresponds to ~5-6mm of camera distance due to the its angle relative to the camera).

Accordingly, this series was focus bracketed for one lens (the 70-200/2.8G VR II) and two of four of those attempts are shown versus the 70-200mm f/4G VR.

The focus bracketing was made even more critical by the sharpness-destroying focus shift of the 70-200/2.8G VR II at this range, a defect that one might reasonably consider unacceptable, and a reason to prefer the ƒ/4 lens, which also does not suffer from the absurd focal length shortening problem of its ƒ/2.8 sibling.

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