I have the Nikon D3200 actually bought only because of this feature. View images directly on the screen of your smartphone or tablet. The idea is good, the bad implementation. Especially large images RAW (NEF) files, you should completely disable. The images on the display screen stutter slightly so to best use the whole only with tripod. The images are transmitted with wireless internet, unfortunately only with 54 Mbit / s, which for larger images simply represents a bottleneck. I had bought the adapter without being the problem previously aware. Nevertheless, it is to be used, especially indoors for UWW shots where it depends on each cm, I still see potential. Here you can put the camera directly to the wall and gets again 20-25cm square. Where there is no room, you can do with the right lens and the adapter pictures. A wired solution would be desirable. Especially for normal shooting or even faster Lan. For snapshots, it is currently unusable.
What could have been done better? Much! namely one could install different exposures for HDR shots or long exposures. I had imagined scenarios the camera to be mounted at the eyepiece of a telescope. Makes so little sense in unfortunately. The adapter provides even more features, for example you can also post or upload images. This happens via the Android app. Very helpful at the hotel or on the road, that's what I wanted. Been very neat and do therefore from time to time and great photos. This I can then spread over the phone.
Pro:
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+ Very compact
+ Beautiful storage for camera strap
Negatives:
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-only 54 Mbit / s, which is too slow for snapshots
-In The screen we see nothing in real time for halting transmission
-zuwenig opportunities where remains HDR or Long Exposure
Conclusion:
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More gimmick, it simply lacks control options. Overall, little applications as too slow. Better the adapter with USB port so you would can directly connect to the camera via cable smartphone or tablet. Currently only suitable for landscape or indoor, practical for wide-angle where no space is available. Here Nikon still needs some touching up, not only on the adapter and the app lacks many important functions realizable. The app registers itself in the startup of the smartphone, can be disabled in the settings of the app. If further improvements follow, so follow my part more stars.
Tested with the Samsung Galaxy S3.
Addendum:
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So I'm here once wrote dissatisfied, now I am very satisfied. I've been using the app "DSLR Dashboard", this support now also the adapter. The Nikon software is still unusable. The Dashboard software provides everything you need, even the image transfer went fine, the images are compressed before. Now there's another 5 points.