Here are some 100% crops of photos taken with the Fujifilm X-S1 at all ISO settings, from ISO 100 to ISO 12,800. As a mise en bouche to my review of the X-S1 to be published next week, let’s see how the 2/3″ CMOS EXR sensor behaves. If you are familiar with the Fujifilm X10, no surprise, the X-S1 gets the same image quality. At all ISO settings, the X-S1 offers the best image quality of all bridge cameras. A logical result as it is the only one with a bigger than usual sensor (or not so tiny as usual should I say). As you can see, the X-S1 does pretty good from ISO 100 to ISO 800 with a slowly increasing loss of details. It is only at ISO 3,200 that the image suddenly gets worse with color variation and a noise reduction algorythm that hurts a lot of details.
Note that the resolution of the X-S1 ISO 6,400 images is 6 megapixel and 3 megapixel for the ISO 12,800 ISO photos that are barely usable.
I compared these shots to the Panaosnic GX1 which does better, but not that much in spite of its bigger MFT sensor. Actually the GX1 does not improve the Fuji X-S1 images of 1EV. Things are different with the Canon G1 X images. Canon did so well both reducting noise artefacts while enhancing the sharpness. Bigger sensor, better algorythm, the Canon G1 X offers a benefit of 2Ev compared to the XS-1.
To put it in a nutshell : the Fujifilm X-S1 can be used between ISO 100 and ISO 800 without too many loss of details. ISO 1,600 remains ok, but it is the highest sensitivity I would advise to use on the X-S1 as ISO 3,200 at higher ISO settings won’t fit in your standard if you bought this nice camera, I guess you expect a high image quality. Which is does offer. Again, the Fujifilm X-S1 image quality is the best of all bridge cameras.
In addition to that, the EXR mode enhances the results. To be honest with the camera and its competitors, I took these comparison images in aperture priority mode, not in EXR S/N priority, but I’ll post sample images of the X-S1 used under this particular mode. It the X-S1 review, I really wanted to use it as a travel camera, without shooting RAW, using film simulation braketing, panorama images, and all fun and creative functions the X-S1 offers. I’ll post it pretty soon, right after the X-Pro1 review I am currently working on, with lots of (unexpectedly rainy) Malta images.