We have been talking about it for weeks, so no surprise to see an official launch of the Sony Xperia Z1F. Although there are a few gaps still to be filled in.It's a smaller version of the flagship Z1 smartphone, a highly rated device when we reviewed it earlier this year. With that in mind, this is likely to be an impressive piece of kit too (although we'll wait for the hands-on before we make any judgements).The Z1F has just been announced in Japan, offering a 4.3-inch 720P display, a 20.1-megapixel 'G Lens' camera, a quad-core 2.2GHz Snapdragon 800 processor, 2GB RAM, 16GB of built-in storage, NFC, Qi wireless charging, and a 2300mAh battery. That's a lot of power in a relatively small package.The Z1F will be offered in a choice of colours, those being lime, black, white, and pink, with Android 4.2 currently down as the operating system. That's what we do know. What we don't know is very much about availability. Japan is down to get this in December, with details outside of Japan pretty much non-existent. There's no reason why this isn't going to be launched elsewhere, but with no talk of any sales ahead of December, there is still plenty of time for Sony to sort out international sales details.