A strange one this. Despite paying big to buy Instagram just a matter of weeks ago, Facebook has launched Facebook Camera for iPhone, which does much the same.The Instagram sale hasn't yet been completed, so there's no borrowing of technology here. Although Facebook Camera does use Instagram-style filters to add an effect to your camera phone shots. There are 15 to choose from too, which isn't a bad selection to start with.But the filters perhaps aren't the main selling point here, despite them being a fairly big one. The idea here is for Facebook to get a foothold in this market, cutting out third party apps (and the need for a camera and computer) to get your photos on the site faster than ever.Just take the photo and share on the site – or do a batch of photos and add them to the site with a click of a button. You can also see all of your friends' latest photos in one place, edit your own photos, tag friends, add captions and location details.It's not exactly groundbreaking, but you suspect this is only version one of something that will get bigger and better and time goes on. If you love adding snaps to Facebook and you have an iPhone or an iPod touch, Facebook Camera looks well worth a download, especially as it's free.