[Joe_HF]

有冇人可以證實一下?

http://www.imaging-resource.com/PRODS/S400/S40PICS.HTM

Flash Range Test

Good flash range, only a little falloff at the 14 foot limit of the test, but a little "cheating" to get there...

In my testing, the S400's flash illuminated the test target all the way out to 14 feet, without any significant decrease in intensity. It turns out though, that the S400 "cheats" a little to get that range: When the flash is active, the camera apparently boosts its ISO setting automatically, the increased light sensitivity helping greatly with the flash range. I don't have any way of telling what the ISO is actually boosted to, since my utilities here that read the EXIF header information can't interpret the S400's ISO information. Judging from the image noise though, I'd say that it's boosting it to somewhere between ISO 200 and 400. It would be nice if this auto-boost could be disabled for those times when low image noise is more important than flash range, but I suspect that most consumers will be happy enough with the results as they are. Below is the flash range series, with distances from eight to 14 feet from the target.