The Novoflex NEX/NIK adapter makes it possible to mount Nikon lenses on the Sony NEX camera line. Read more about the lens here or here. On the Novoflex homepage you find an adapter finder here.
The Nikon 50mm f/1.8 AI is a manual lens. The Novoflex NEX/NIK adapter is also only a manual adapter. However this is not a problem with the Sony NEX-5. You just have to be aware of some things.
Make sure you enable the shooting without a lens: Menu → Setup → Release w/o lens → Enable
Before you continue make sure you have Firmware ≥ Ver. 04 installed! Check this using Menu → Setup → Version. When you have an older version installed download the latest version from the Sony support site here.
Enable the MF Assist function using Menu → Setup → MF Assist → 2 Sec You can choose between No Limit — 2 Sec — 5 Sec.
Enable the Peaking Level using Menu → Setup → Peaking Level → Mid
You can choose between Low — Mid — High.
Choose your Peaking Color using Menu → Setup → Peaking Color→ Red
You can choose between Yellow — Red — White.
Switch your camera to A- Mode (aperture priority) and use the MF Assist button to get a perfectly sharp picture even when shooting the lens wide open with f/1.8!
This post tries to answer the question whether it is possible to stitch a spherical panorama made from so called sweep panoramas. They can be made using e.g. the Sony NEX-5. A somehow finished panorama can be seen, however it has some big errors and looks really wierd.