Apple iPhone 6 And iPhone 6 Plus Review

Camera: Photo Quality

Still Image Quality

In order to evaluate image quality, I took a variety of pictures under different lighting conditions. All pictures were taken with the native camera app using default or automatic settings.

Pictures from the iPhone 6 Plus (iOS 8.0.2) are compared with those from the iPhone 5s (iOS 7) and the Samsung Galaxy Note 4. Even though the camera hardware in the iPhone 6 and iPhone 5s is very similar, there appears to be some software differences between iOS 7 and iOS 8 that affects white balance and purple chromatic aberrations in certain lighting conditions, negatively affecting the iPhone 6’s picture quality. The use of local tone mapping can also cause aberrations in certain situations.

The pictures from the Galaxy Note 4 have a 16:9 aspect ratio, whereas the iPhone captures images in 4:3. Since our picture album feature also requires a 4:3 aspect ratio, the Note 4 pictures are cropped. Also, the comparison pictures were resized to fit within the bounds of our picture album, which affects image quality by reducing detail. A link to the original full-size images is provided at the bottom of each comparison section.

Full Size Images: iPhone 6 Plus, iPhone 5s, Galaxy Note 4

This picture of a flower was taken indoors, without natural light, in the lobby of a hotel. As expected, the images from both the iPhone 5s and 6 Plus are nearly identical. The color balance looks correct, but they look a little dark.

Also note that the 6 Plus was able to hold its shutter open twice as long and use a lower ISO setting thanks to the stabilization provided by OIS. The ability to use a lower ISO setting has the potential to reduce noise in the image.

The color balance on the Note 4 skews too far into the red. While this makes the flower petals’ color look more saturated, the green in the leaves and styles is a bit off.

Full Size Images: iPhone 6 Plus, iPhone 5s, Galaxy Note 4

In this outdoor scene with some shadows, the 6 Plus holds its shutter open longer and creates an overall brighter image. Unfortunately, the OIS doesn’t fully compensate for my shaky hand and the image comes out a bit blurry (it’s more pronounced in the background). It also looks like the 6 Plus applied some tonal mapping to reduce reflections on the rear fender as discussed in the linked article above.

The image produced by the Note 4 is impressive, with nearly perfect exposure and white balance. Zooming in, we can see the advantage of having a sensor with twice as many pixels, as there’s far less aliasing along edges and objects in the background retain much more detail.

Full Size Images: iPhone 6 Plus, iPhone 5s, Galaxy Note 4

This outdoor scene was taken in Central Park under more challenging lighting conditions. The foreground is in heavy shadow, while the pond and sky are brightly lit. This shot would definitely benefit from using the high dynamic range (HDR) feature, but while HDR was set to automatic for each device, the iPhone cameras didn’t use it. The Note 4 does appear to use HDR even though the image metadata says it didn’t.

The image taken by the 6 Plus is a little brighter than the one from the iPhone 5s, but otherwise they’re essentially the same. The image from the Note 4 is markedly different, though. The dark shadows are nearly eliminated, brightening up the entire scene. The blue sky gets a little washed out but otherwise the image is pleasing to the eye. You could argue that the iPhone images more accurately capture the scene, but ultimately I prefer the image from the Note 4.

Zooming into the full-size images, the Note 4’s higher resolution really shines. The leaves and branches in the foreground trees are better-defined, and the you can discern the faces of people standing on the bridge. The Note 4 even captures the individual elements of the fence just behind the bridge, versus a smeared shadow from the iPhones.

Full Size Images: iPhone 6 Plus, iPhone 5s, Galaxy Note 4

In this night shot, the 6 Plus shows less noise in the dark sky than both the iPhone 5s and Note 4. However, the Note 4 shows less noise on foreground objects like the front of the building. Looking at the reflection on the wet street, we see a weird noise pattern from both iPhones that’s not present in the Note 4 image. This could be caused by the noise reduction algorithm used in post-processing by the iPhone.

Once again, both iPhones do well with color accuracy. The Note 4 puts a little too much emphasis on yellow, giving the gray building a slightly yellow cast and oversaturating the street lights.

Full Size Images: iPhone 6 Plus, iPhone 5s, Galaxy Note 4

The next three photos examine low light performance in a controlled setting. This first image is a baseline using some cool fluorescent lights and overhead incandescent bulbs. The Note 4, while a little dark, produces the superior image. Both iPhone images lack contrast and have a yellow tint. Objects in the Note 4 image are also much crisper. The iPhone’s lack of resolution and over-aggressive noise reduction makes objects in its images far more indistinct.

Full Size Images: iPhone 6 Plus, iPhone 5s, Galaxy Note 4

In this challenging low-light shot, the 6 Plus has far less noise than the iPhone 5s. It does this by keeping ISO at only 250 compared to the 5s’ ISO of 1000. With a lower sensitivity, the 6 Plus holds its shutter open longer to capture more light and relies on OIS to stave off camera shake-induced blur. The 6 Plus relies heavily on this strategy, so much so that it only supports up to ISO 500. The iPhone 6, without OIS, supports up to ISO 2000. In general, raising ISO increases noise, so the 6 Plus, shooting at a lower ISO, handles low-light settings better than the iPhone 6.

The Note 4 didn’t record any metadata for this image, but we can easily see it’s darker overall than the image from the 6 Plus and also has more background noise.

Full Size Images: iPhone 6 Plus, iPhone 5s, Galaxy Note 4

Now we’re using the same ambient lighting as in the low-light pictures, but we turn on the camera’s flash. Again, the 6 Plus produces a better image than the iPhone 5s, being brighter and with less noise. It’s far from perfect, however, as the color is a bit too warm and the picture lacks contrast. At a distance of only a couple feet, the light from the flash is too concentrated on the middle of the image, making the center too bright and leaving the edges dark. This situation improves as you move further from the subject and allow the light cone to spread out more.

The Note 4 does very well with its flash turned on. While the image is darker than the one from the 6 Plus, the light from its flash is more evenly distributed. The color balance and contrast are also excellent. With more light, the Note 4 captures additional detail, but with a bit more noise than the 6 Plus.

Camera Performance

Shot-to-shot performance on the iPhone 6 and 6 Plus, like that on the iPhone 5s, is nearly instantaneous. Even with HDR turned on it only takes around a half a second to process each image. Performance and the overall user experience is further improved by PDAF. While the iPhone 5s takes between 1-2 seconds to refocus every time the camera moves, and has trouble maintaining a focus lock in low-light conditions, the iPhone 6 manages to focus in near real-time and no longer struggles with focus lock. The speed is truly impressive and it makes taking pictures with the iPhone more enjoyable.

In terms of image quality, there are more similarities than differences between the iPhone 6, 6 Plus and 5s. For most conditions, all three produce comparable pictures. The biggest difference occurs in low-light conditions, where the 6 Plus can use OIS to keep the shutter open longer, reducing ISO and, thus, noise.

It wasn’t that long ago that the iPhone set the standard for image quality in phone cameras. However, Apple has failed to keep pace with the rapid advancements made by other companies. And while the iPhone camera is still quite good, it’s no longer the best. Image quality suffers primarily from a lack of resolution for both the front and rear cameras, resulting in pictures that can’t match the sharpness and detail shown by competitors like the Note 4 above. Apple also needs to fix the post-processing aberrations that have crept into iOS 8 affecting white balance and tone mapping, among other things.


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25 comments
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  • manez
    I can think of a thousand more interesting things to review than the newest iphone x.
  • blackmagnum
    Everyone would want to own one and be the envy of their peers. They want a device that is attractive, well-made and intuitive. That's how Apple sells them by the millions, don't you agree?
  • lanbaner
    Nvidia has a better GPU. The G3 has a better display. The Note 4 has better camera. Gone are the days were the iPhone was the leader on all fronts. Would be nice to see all the strengths from the competition in one phone. Considering the transition to 20nm for Maxwell early next year we could possibly see an iPhonekiller on all aspects. Although I have to agree that the build quality on the iPhones is always top notch.
  • M3God
    Other then just sticking to just 1GB internal memory, there is no mention that apple switched to cheaper and slower TLC memory to make more profits while screwing the customer. The TLC memory has been linked to crashes and bootloops that require a trip to the apple store.
  • aaaas
    I browse the Web and talk on the phone on Verizon all the time. At least the last two generations of devices have been able to do this... at least for android...

    Interesting article, as I've been considering a switch to iphone.
  • KaptainK
    " Wi-Fi calling is currently only supported by T-Mobile in the U.S."

    Not True! Republic Wireless has been using wi-fi calling for years. Republic also includes a feature where it will hand the call off from wi-fi to cellular if you leave the wi-fi zone during the call. Does the iPhone do this??
  • cknobman
    A. Thanks for including the Lumia 1520 in the comparison chart of phablets, most other sites dont do this.

    B. The price for the 6 plus in that same chart ($299) is on contract while every other device price is off contract.

    As a whole if you are an iPhone user I am sure you are happy with the changes made to the 6. Outside of that the iPhone "cool factor" ship has sailed and this wont be winning over many Android users.
  • cmi86
    How can this guy sit here and hump apples leg by saying the A8 should be competitive if not class leading when it's competition averages over 1Ghz higher clock speed and 2 more cores.... I know a lot of people doing reviews now a days feel obligated to shine up certain companies and make their products appear in a positive light. This is not that... this is a blatant lie.
  • SirKnobsworth
    [blockquote]How can this guy sit here and hump apples leg by saying the A8 should be competitive if not class leading when it's competition averages over 1Ghz higher clock speed and 2 more cores.... I know a lot of people doing reviews now a days feel obligated to shine up certain companies and make their products appear in a positive light. This is not that... this is a blatant lie.[/blockquote]

    Clock speeds and core counts can be deceptive, the key point here being that Apple's Cyclone cores can execute about twice as many instructions per clock cycle as most of their competitors. This shows up in the benchmarks - the iPhone 6 and 6+ do very well in single threaded tests, though tend to lag behind competitors in multithreaded tests like physics. Note that this is also the approach that Nvidia is taking with their Denver cores - fewer, bigger cores as opposed to more small cores.

    How this translates into actual performance will vary of course - most smartphone workflows aren't particularly well threaded so having four cores as opposed to two probably won't make a huge difference in many situations, but I'm sure there are plenty of exceptions.
  • ZXS
    Quote:
    Due to their zero reading on the black level tests, AMOLED displays are said to have an infinite contrast ratio.


    MATT, do you know this is Samsung's marketing BS?

    Smartphone displays reflect about 6% of incoming light (which is much more than LCD backlight emits). Actual contrast of AMOLED is worse than that of LCD since the reflections are so high, but maximum brightness is much lower than that of LCD.
  • ZXS
    ADDITION: iPad Air 2 is a breakthrough in screen reflection levels, which are down to 2.5% versus 5-6% on any other smartphone/tablet screens. This is the technology to increase actual contrast ratio.

    However, none of smartphones have that technology yet. Maybe it will debut in iPhone 6s/6s+ next year.
  • ZXS
    Quote:
    Image quality suffers primarily from a lack of resolution for both the front and rear cameras, resulting in pictures that can’t match the sharpness and detail shown by competitors like the Note 4 above.


    This is purely academic point since there are no screens to see even iPhone's 8 MP resolution, let alone anything higher. On any real screen of any real smartphone, tablet or a PC/Mac (except for Retina) pictures from iPhone look absolutely sharp as their resolution way exceeds capability of screens.

    So in real life more consistent quality in average, including absence of insane colour/shadow perversions that Note 4 has at times, makes a better camera.
  • ZXS
    Quote:
    Other then just sticking to just 1GB internal memory, there is no mention that apple switched to cheaper and slower TLC memory to make more profits while screwing the customer. The TLC memory has been linked to crashes and bootloops that require a trip to the apple store.


    This is pure fantasy, because flash memory was tested and it is even faster than last years fastest flash in a mobile device -- iPhone 5S.

    Also, there are no evidence that reboots has happened to any bigger number of consumers than just few.
  • SirKnobsworth
    Quote:
    Other then just sticking to just 1GB internal memory, there is no mention that apple switched to cheaper and slower TLC memory to make more profits while screwing the customer. The TLC memory has been linked to crashes and bootloops that require a trip to the apple store.


    There are rumors that Apple has stopped using TLC in some devices for precisely that reason. Nothing confirmed though.
  • turkey3_scratch
    1803422 said:
    The media is so biased in favor of Apple. This phone has nothing new, and the hardware specs don't even match up to the latest offers from other competitors. All it has going for it is bigger screens which other phones offered years ago.


    Exactly, these phones hardly had anything upgraded other than size. Today I heard a girl say, "I really want the iPhone 6 since I saw whoever with it". The iPhone consumers could care less about the phoone but they care about the social status it gives them. If they released the iPhone 7 with the exect same hardware and asthetic specs as the iPhone 6, people would still buy it because the majority of people who buy them don't even know what's new! They just want to be able to say "I own the iPhone

    Now, the iPhone's GPU did get a tiny upgrade probably to account for the higher res, and the CPU probably a bit where it is unnoticeable. Saying that the iPhone 6 has worse hardware however would be incorrect, that's just pure Apple hate by saying that. No proof.
  • hiryu
    Reagarding the TLC issue, not all iphones use TLC, only some are, and only 64GB or 128GB version.
    http://www.hkepc.com/11911/page/2#view
    (from Chinese website) The Sample C used the TLC memory (page 2). Sample A and B were not.
  • BrandonYoung
    Not bad specs, not bad benchmarks! Yet I enjoy the ability to transfer files from PC to tablet/phone and not have to worry about conversions, the inability to retrieve them from the later, and the overall middleman hassle that is iTunes. iTunes is horrible, and the biggest reason I personally avoid iStuff.
  • tomfreak
    top size bezel thickness is the problem, not the thickness of the body. Apple should start reduce the top bezel thickness first.
  • Sambidhan Sabha
    first i bought iPhone 6 plus but i couldn't use it quite well because of its size. its too big for everyday use, since i wanted newer iPhone i then bought iPhone 6 and it seems better then iPhone 6 for everyday use. i'm happy with iPhone 6.

    since iPhone 6 plus i bought was from AT&T i couldn't sent it back to my home without unlocking. i quicky google and found out i can unlock at very cheaply from http://www.unlockiphones.info .

    my brother back home is happy with iPhone 6 plus cuz he likes playing games.
  • neon neophyte
    let's not forget the plus bends in your pocket from regular use
  • Harry_Wild
    It pretty clear that iPhone 6 and 6 + is blowing their high end smartphone competitors for the most part of out of the water! At 80% of the charts show the A8 SoC is not only the leader but by a lot!
  • g-unit1111
    955315 said:
    It pretty clear that iPhone 6 and 6 + is blowing their high end smartphone competitors for the most part of out of the water! At 80% of the charts show the A8 SoC is not only the leader but by a lot!


    Define "for the most part". Samsung Galaxy Note 4, Nexus 6, and even the LG G3 all have 2560 x 1440 resolutions on their screens, where Apple is just now using 1920 x 1080P. The Note 4 and G3 also have removable storage which can accommodate up to 128GB micro SXHD cards, where the iPhone 6 cannot. I could go on and on.
  • BrandonYoung
    I miss my back button when using iPhones.
  • xTTT
    Good article. But can we get some real world tests please that also include multi-tasking? And I don't mean opening and closing a gazillion apps.

    I mean real-world stuff like:
    1. maintain a skype call while emailing 5 photos that have to be resized (obviously, use same photo sizes).
    2. Update several apps while playing back a 1080p high bit-rate movie.
    3. Use Adobe Photo-Touch to enhance and touch up photos using several layers and masks that will tax the system.
    4. Upload a large video to Youtube while doing some or all of the tasks above.
    5. Upload and download large files from Dropbox while doing some or all of the tasks above.

    Thanks!