Apple's dual-camera implementation doesn't look like golden awesomeness, but it does seem pretty good; the only computational aspect of the system is the background defocus it will be able to perform once the software's updated (see depth of field below). The phone's got one 12-megapixel camera with a 28mm f1.8 lens and a 12-megapixel camera with a 56mm f2.8 lens. Apple refers to the camera with the 56mm lens as "telephoto." That's not telephoto, it's just twice the magnification. It's a "normal" angle of view lens; around 70mm or longer is considered telephoto. However, 56mm is a good length for portraits and other scenes where you don't want the distortion and shrinking of the subject that you get with the typical wide-angle phone camera lens.
Apple is a bit confusing on this point; it doesn't claim "2x optical zoom", and instead the specs are worded "optical zoom at 2x" which is a subtlety lost on many people, I suppose technically the system could be construed as optical zoom: you have a lens for 28mm and a lens for 56mm, so you're getting two different magnifications using lenses, (And the LG G5 got here first.) But "zoom" implies you get get from one to the other with stops in compass iphone case between; the only reason "zoom" may make sense in this context is because 56mm is the next step up from 28mm..
The number of lens elements in the absence of other technical information tells you zero about the quality or performance of a lens. It is a meaningless specification in this context (though not in others). Raw support means Adobe Photoshop Lightroom on iOS now has parity with the Android version. The JPEG photos you're used to getting from an iPhone are automatically compressed and processed, which decreases the number of colors in the photos and clips the bright and dark areas. That makes them hard to retouch without exacerbating the imperfections (called artifacts).
Raw image data comes straight from the sensor -- or at least is minimally processed -- so you can edit them yourself without making the artifacts worse, In theory, The reality is that when you're dealing with photos off such a small sensor, or even compass iphone case a pair of small sensors, you can't gain that much when it comes to editing photos in order to improve exposures or reducing noise to your taste rather than the company's, You do get access to the uncompressed colors, but even then the sensors aren't capturing the complete range because they're tiny..
There's just too much sensor noise and not enough tonal range for you to get better results than in-camera processing, except in a limited number of situations. However, access to the raw files means third-party photo-app developers can access the data so they can deliver better JPEGs and give you control over settings that either they didn't have before or that made photos look worse than the stock camera app's. Apple highlighted Adobe Photoshop Lightroom raw editing on the new phone; now it can have feature parity with the Android version. And since the raw files use the semi-standard DNG format, they're readable by tons of apps and applications on the desktop and other mobile platforms.
