I LOVE the iPhone 4's camera and video camera, and have shot over 5,000 stills and video with mine within the past eight months. But for "outside nature and landscapes" the single focal length is a bit restrictive. For my eye, at least. The iPhone's camera functions can be supplemented by downloading different camera apps, like Camera Control Pro, which really DOES help turn the iPhone into a higher-percentage shooter. Where the iPhone falls down is in lower light; it tends to select slightly too-slow shutter speeds many times, which lead to subject motion blur; the programmed exposure control's "curve" needs some tweaking, IMHO. It ought to notch the ISO up much higher, much sooner, rather than stay at f/2.8 and 1/15 second under so,so,so,so many scenarios; it would be FAR better if it would immediately move the ISO upward to 800 to 1,000 and keep the shutter speed in the 1/60 range, as opposed to 1/15.