Some pictures and a video comparison I took of both!
The pictures, should show a nice comparison between the 8MP (Lumia) and 5MP (SGS) camera on both devices! Click on the pictures to make them larger, alternatively, I would suggest tabbing both, and then comparing between the two.
Obviously the Lumia’s camera should be better, and indeed it is, as it has a 8 Megapixel camera with a F number/aperture of 2.2 vs the SGS i9000’s 5 Megapixel camera with a F number/aperture of 2.6 – You will also be able to see that the Nokia’s lens is a little wider, especially with the Chimp comparison.
It has to be noted however, that the Lumia’s camera isn’t really consistent – if you look at the 3 photos of the Chimp on the table (at the very end) – they tend to vary in colour, and focus! When Looking at the cars on the street comparison – you will be able to see that the Lumia didn’t focus well on any of the objects, whereas with the SGS, I had no problems.
And here is my video comparison (recorded both at 720p) – they do both look a little grainy – that might have been due to the rendering – but regardless, you should still be able to see the quality difference!
Hope this helped and showed you a good comparison!