[Night Shooting] - The 26x optical zoom "gets" you to places or perspectives that you may otherwise not have. Here are a couple of examples, while you may argue that these may not be the best examples, but I hope regardless, you see the point.
Example 1 - Moon : The last time I took pictures of the moon was with my D200 (1.5x crop), 300mm, and 1.4x teleconverter = effectively 630mm... eeerrr very similar to the 624mm (26x zoom) offered by the X-S1. I'll let the picture speak for itself, it may not be the sharpest image of the moon money can buy, but then again, I haven't seen any compact come anywhere close to this. This was of course taken with the assistance of a tripod. Given a clear night with a bright moon, you could be shooting at 1/30 - 1/125sec... not unheard of to able to shoot this without a tripod, but you're still going have to be pretty "steady".
- 624mm, 1/30sec, f/8.0, ISO100 w/tripod
- 100% crop (1200x800)
Example 2 - Nightscape : Sometimes, it's just a segment of the landscape that is of interest... anything wider may get near / far objects to obstruct / distract from the beauty of what you're looking at. Here are a couple of other shots of the ArtScience Museum and the Singapore Flyer taken about 3-4km away, using near or at full 26x zoom with the aid of a tripod at speeds down to about 2sec exposures.
While the 26x zoom can "get you there", given the night (lack of light), you're going to need some additional help with the shot. The last picture was done handheld at 2sec exposure.... even with the image stabilizer on, its not exactly reasonable to expect it to help you hold for 2sec at 480mm - rule of thumb, you would want a shutter speed of at least 1/(effective focal length), in this case, 1/480sec - a 2-stop IS would bring you down to roughly 1/125sec. Bridge some of that but using a higher ISO setting, but that still leaves quite a bit of work for yourself... best have a lightweight tripod or use some improvised support.
- 624mm, 1sec, f/5.6, ISO100 w/tripod
- 520mm, 2sec, f/5.6, ISO100 w/tripod
- 482mm, 2sec, f/5.6, ISO100 (standing, unsupported)
Caveat : Images are taken using a Pre-Production model of the Fujifilm X-S1.