I was comparing the F10 to the Sony P150 this summer upgrading from my Fujfilm F450 and found that the P150 was the better of the two. (P150 now replaced by similar P200).
The reason?
1) Smaller, easier to pocket size of the P150. (even smaller with the P200).
2) Both had very long (300+ shot) battery life, more than sufficient in my case to take 500+ photos over 6+ hours.
3) BUT MORE IMPORTANTLY, only the Sony digicams tell you exactly, down to the very LAST MINUTE, how much remaining battery life you have in hh:mm! You can definitely rely upon the Sony to tell you how long you've got; the F10 will not, and you may think there's enough battery, but then find the unit dead sooner than you'd like.
4) The P150 LCD screen is more daylight viewable, and has a faster display response vs. the F10, which is sometimes jerky and sluggish in keeping up when you pan around. (The P200 screen is a bit larger, though smaller than the F10 2.5" but still very useable.)
5) BUT, the P150/P200 have the advantage of an optical viewfinder for those times where you simply can't see anything clearly on the LCD screen in bright daylight, or even prefer to keep the LCD off in a dark event concert/performance hall when taking photos of your kid.
6) I'm not the type to take lots of nighttime/low-light photos - thus, the tooted advantage of being at Disneyland at night simply doesn't exist for me for the F10's 800/1600 ISO feature.
7) The AF and response of the P150/P200 is superior to the F10. ESPECIALLY the AF lock, which is more sure on the P150/P200 than the F10, which occassionally hunts around and can't lock.
8) The DUMMY mode (ie. don't mean she's one) is super-easy to set on the P150/P200 -simply switch the knob to the green symbol!
On the F10, there IS NO one-button DUMMY MODE! If you've put it into anything but full auto, you have to hunt through the menus to get it back into AUTO mode!
9) For those night-time shots, you can 'preset' the camera for someone else into manual focus mode (eg. 0.5, 1.0, 3.0m,,etc) with forced flash on, and let that person take instant & beautiful indoor/nighttime shots of groups, babies, people, etc. w/o ever having to worry about not autofocusing in time or missing a fleeting moment.
This is and was a LIFESAVER for me - instantly, moving from my old F450, I was able to catch great group shots, dancing people, parties, etc. w/o every having to worry about the slow AF beam to lock focus at night, and I was able to catch shots few other P&S camera could (most only have full AF mode, not fixed/manual focus).
In daylight, this is a total lifesaver -- simply set the camera to 3.0m or 7.0m fixed focus mode, then let them at it. Every shot will fire instantly the moment the button is pressed all the way down, and almost every shot will be in crisp focus (using the fact that you've preset at a distance that will get you near hyperfocal for the lens). F10 can't do this, and you'll miss shots waiting for the AF to kick in.
10) Finally, the true test was printing the images. P150 images off my Epson RX500 6-color all-in-one inkjet printer straight, no manipulations, PIM mode, Best photo quality to Epson Premium Glossy Photo Paper has filled my photo album this year with more saturated, colorful, amazing snapshots than the F450 I had. Photo after photo come out looking very good to great, and I'm certainly happy that I don't have to tweak many shots to get great prints.
And, take a 7.2MP P150 image to the lab, printed at 24x30" poster size, my beach shots come out looking better (less noise, same level of detail, smoother & less grainy) than my film shots from my SLR (Minolta 600si, 400ISO FujiFilm negative).
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If you want something smaller, the other Sony 5MP digicams such as the T5/T33/T7 are great picks with the same fast AF speed and manual focus lock feature.