Fujifilm Finepix S1 Samples

Below are sample crops from an indoor photograph taken at each ISO of the Fuji Finepix S1. A crop from the Fujifilm X-S1
Fujifilm X-S1 at the same ISO setting is shown next to each one of the Fuji S1. Images below are all unmodified 100% crops from their respective cameras taken at the highest quality setting. ISO, WB and aperture were set on camera, everything else was left on automatic.

These crops help determine which ISO settings can be acceptably used. As noise increases, most cameras compensate with noise reduction that introduces softness. The result is that, while you can partly reduce noise at the expense of details, the maximum acceptable print size gets smaller as ISO is increased. When a print becomes unacceptably noisy is a matter of personal taste.

Fuji Finepix S1	Fuji Finepix X-S1
ISO 100	ISO 100
ISO 200	ISO 200
ISO 400	ISO 400
ISO 800	ISO 800
ISO 1600	ISO 1600
ISO 3200	ISO 3200
ISO 6400 (8 MP)	ISO 6400 (6 MP)
ISO 12800 (4 MP)	ISO 12800 (3 MP)

The larger pixels of the Fuji X-S1 give it an advantange all the way through except at the last ISO of 12800 where the S1 manages to recover more details while downsampling from its full-resolution of 16 to 4 megapixels.