Comparatively light and handy, but it is enough for the D800?

So many 5-star reviews on the fabled field, a lower weight thanks to plastic casing, promising test results over the entire zoom range even at maximum aperture - this objective should cover on a D800 the appropriate area.

Ordered, delivered by Amazon promptly, unpacked and plugged. First photos open at 70mm, and ... - unfortunately somehow not quite sharp and quite dull. Tried again in 105mm and 200mm, which is a dream VRIII. Quietly, the viewfinder freezes, and ... - already better sharpness, but not convincing. All right, a little more systematically approached the matter ...

Amazon board about a 45 ° angle draufgehalten at the end of the 3m long table and the D800 with 70-200 at the other end and. Focusing on the same letters in the lettering and tested at 70, 85,105,135 and 200 mm focal length with each aperture 4 and Aperture 5.6. If no fehlfokus at center focusing recognizable, ever good.

Indoor: to the tripod then scanned a map with a lot of lettering in about 3-4 meters, focal length and aperture as in the example above. Result particularly blurred in the right half of the center starting at 135mm. 70 & 85 mm generally something very soft, 105 & 200mm very nice and by all focal lengths with the sharpest overall impression in the center.

Outdoor: Several house fronts. Static motives. Portraits, moving and at rest always with center focus and 4x the reciprocal of shutter speed - Result: not convincing, too little focus already in the center, especially at 70 85mm. Far too often, incorrect focus, especially with moving subjects. Sufficient light was always present.

What to do, like I wanted to keep the lens, but the gut feeling told otherwise. Checked with Amazon and a replacement was delivered. I will stop there, massive back focus in this model at 70 mm (correction -7) decreasing to 200 mm (correction -3), therefore not usable.

Twice had bad luck, or is this lens for the D800 rather unsuitable? Or just to high expectations? I have the fabled sharpness in the recordings in any case can not be found.

The processing of Kunstoffgehäuses that free movement of the zoom ring and the focus ring on the other hand I found compelling.

Meanwhile, I hire the much heavier, unhandlichere variant F2.8GII / 70-200 comparatively used, and I may say - yes, in between are worlds apart. Even at full aperture, the sharpness is persuasive and as I would expect it nearly, in any case, the sharpness is visually comparable so insufficient with F4G / 70-200, which I got delivered and therefore for me on the D800.

And now? I have my F1.8G / 50 again plugged and made some nice crisp shots. Otherwise, I'm waiting for another batch of Amazon or will try it elsewhere times.