Some Lumia owners will be able to take photos more quickly these holidays -- and they might be better, too -- now that Microsoft has begun rolling out its latest software update called Denim. We say "some," because only Lumia 830, Lumia 930, Lumia Icon and Lumia 1520 owners will be able to enjoy the new features for now, andonly if they live in one of the select countries getting the update. Denim, which wasannounced back in September, speeds up the Lumia camera app and brings image quality-boosting features with it. The new Rich Capture mode, for instance, automatically uses HDR, Dynamic Flash and Dynamic Exposure to take pictures, while a new imaging algorithm allows it to snap crisper daylight and lowlight images.