I shot this last week on a canon g16 and it got me thinking.
Gibraltar Rock nightscape by robjdickinson, on Flickr
I used a Gigapan epic pro and shot 8 frames for this. Its noisy at 100% but the results surprised me and its easily as good as a single frame from a FF SLR (if you could frame this in one frame) - the result image is about 10,000x4300 but really would work at 5000px wide.
+ Gigapan epic pro is large and bulky, and not cheap.
** So the challenge - find an efficient sensor small camera and very high quality fast lens in the 30-50mm (ff terms) or so focal range to run on a cheaper gigapan 100.
Now I am not worried about size of sensor. Why? because with a smaller sensor I will just need more frames (within reason). This negates the size of sensor somewhat but not the need for a good lens.. I obviously dont want to spend 5 hours shooting a night panoramic so a very small sensor and 400mm lens wont workk..
The lens needs to be good at f2.0 I think (say a 1.4 prime). Good as in low CA, no coma, low vignetting. Not too bothered about sharpness, I expect it would be fine for any lens. Lens can be manual focus (actually preferred!)
If the ideal solution is a 35 or 50 on a 6d then fine, am suspecting a crop body ( nikon D3100?) could possibly be a better option, or even a nex 5 or something.
I know a FF sensor is usually twice as good as a crop (one stop+) but remember I will be taking more shots with the cropper so its more down to efficiency...
An eos M and sigma 35/1.4 or a 50?