Camera - Daylight Evaluation: Zoom and Scenic

The iPhone XS’ come with a brand-new camera module: Apple has increased the sensor size of the main camera sensor by upping the pixel pitch from 1.22µm to 1.4µm. This increases the actual area of each pixel by 48%, which means it equivalently increases the light collection capabilities of the sensor.

Apple hadn’t changed the lens system, and because the sensor is now bigger, it means that the effective field of view has increased, reducing the focal length from a 35mm equivalent of 28mm down to 26mm. Apple didn’t really talk much about this during the keynote nor in the marketing materials of the phone, however I do find it as a great positive of the phone, as in everyday shots you just get more scene to work with, something that makes a lot of sense given the continued inclusion of a 2x telephoto lens.

SmartHDR as Apple calls it, is a new HDR system on the new iPhone XS’. The phone will now capture two subsequent pictures, one at high exposure, and one at low exposure, and apply proper processing to create a natural looking high dynamic range image.

Click for full image
[ iPhone XS ] - [ iPhone X ] - [ iPhone 7 ] - [ iPhone 6S ]
[ Galaxy Note9 ] - [ Galaxy S9+ ] - [ Galaxy S8 ]
[ LG G7 ] - [ LG G6 ] - [ LG V30 ]
[ OnePlus 6 ] - [ Mi MIX2S ] - [ Pixel 2XL ]
[ P20 Pro ]

Starting off with the first scene, I’m actually surprised just as how many phones still have trouble with such a shot and in getting a correct photo exposure. The difficulty in this shot in bright sunlight and clear skies, is that a lot of phones will apply their HDR processing and overdo it in terms of bringing down the highlights of the trees, resulting in outright muted colours that just look odd and more something you’d expect from an overcast day.

The iPhone XS performs excellently in this regard, as it’s able to properly maintain the bright sunlit foliage throughout the scene – something the vast majority of other phones had trouble with. Previously I was a fan of the OnePlus 6’s HDR processing, and the V30 also produced great pictures (Something that the G7 couldn’t reproduce).

The improvements of the iPhone XS over the iPhone X are less so in the highlights, but more in the shadows of this shot. The XS just manages to retain a significantly more details in the dark areas.

In terms of detail retention, the iPhone XS might be a bit better than the X. On the left side of the picture I had quite some blurring on the iPhone X, I’m not sure if this is due to shake or optics, something we can verify in later shots.

In terms of the 2x telephoto lens, the iPhone XS sees huge improvements over the iPhone X. While last year’s iPhone had significant issues in terms of colour reproduction on the zoom lens, the iPhone XS’ result is much more akin to the main sensor’s image. There’s an outstanding difference in colours as well as increased detail retention in the shadows. Other 2x zoom phones also have great difficulty in terms of their HDR processing, and it looks like the XS’ new processing puts it at the forefront in this shot.

Click for full image
[ iPhone XS ] - [ iPhone X ] - [ iPhone 7 ] - [ iPhone 6S ]
[ Galaxy Note9 ] - [ Galaxy S9+ ] - [ Galaxy S8 ]
[ LG G7 ] - [ LG G6 ] - [ LG V30 ]
[ OnePlus 6 ] - [ Mi MIX2S ] - [ Pixel 2XL ]
[ P20 Pro ]

Moving onto the next shot, we have again a scenic shot brightly lit up by the sun. Here it’s a lot harder to see the difference between the iPhone X and the new XS – other than the wider field of view of the new module. Both phones do well, although I feel like Apple’s reducing the highlights on the buildings just maybe a bit too much, not properly conveying the brightness of the scene. I feel Samsung is doing better in this regard, but they might overdo it. OnePlus 6’s processing is again a sweet-spot in-between, I feel. 

Again on the left side of the image we see some significant chromatic aberrations on the iPhone X, and the XS is able to provide sharp details up until the very edges of the frame, meaning Apple seems to have improved the quality control on the lens glass.

Detail-wise, the main shooter is on par with the iPhone X and this year’s Galaxy phones, with relatively minor differences between all the phones.

Again on the telephoto lens, the XS improves on the X, even when not quite as evident in this shot. The colour balance is better, and the contrast between highlights and shadows is mode defined.

Click for full image
[ iPhone XS ] - [ iPhone X ] - [ iPhone 7 ] - [ iPhone 6S ]
[ Galaxy Note9 ] - [ Galaxy S9+ ] - [ Galaxy S8 ]
[ LG G7 ] - [ LG G6 ] - [ LG V30 ] - [ OnePlus 6 ]
[ Mi MIX2S ] - [ Pixel 2XL ] - [ P20 Pro ]

We continue on, and again here we see the main improvements of the iPhone XS’ processing is much better retention of shadow detail and contrast.

This is also the first shot where the XS has an evident advantage in detail over the X: The new phone had a mere 1/2257th second exposure, shorter than the iPhone X’s 1/1621th second one. Beyond the improvements in the shadows, there’s also a lot more detail overall in the scene. Notice how the brickwork on the cathedral tower is a lot more defined on the XS.

In terms of competition, Samsung is able to get even more details out of the shadows and produce a brighter image overall. While the iPhone XS isn’t the best in terms of bringing out the shadows across the phones, it gives an excellent balance between brightness and image sharpness.

Click for full image
[ iPhone XS ] - [ iPhone X ] - [ iPhone 7 ] - [ iPhone 6S ]
[ Galaxy Note9 ] - [ Galaxy S9+ ] - [ Galaxy S8 ]
[ LG G7 ] - [ LG G6 ] - [ LG V30 ] - [ OnePlus 6 ]
[ Mi MIX2S ] - [ Pixel 2XL ] - [ P20 Pro ]

The exposure and colour balance between the XS and X is very similar in this shot. Only again in the shadows does the XS bring out more details. The red chair is a good example of how the wide gamut capture of the iPhone’s can really distinguish themselves from the competition – unfortunately if you don’t have a proper display to showcase this one, it’ll result in toned down colours. Least to say, it looks really iridescent on the iPhone XS’ display.

Click for full image
[ iPhone XS ] - [ iPhone X ] - [ iPhone 7 ] - [ iPhone 6S ]
[ Galaxy Note9 ] - [ Galaxy S9+ ] - [ Galaxy S8 ]
[ LG G7 ] - [ LG G6 ] - [ LG V30 ] - [ OnePlus 6 ]
[ Mi MIX2S ] - [ Pixel 2XL ] - [ P20 Pro ]

In this shot, we again see more shadows than in the iPhone X. The iPhone produces a tad lower exposure than the S9, Note9 and OP6 – however I do understand why this is as the sun against the building really blows out on those phones, but I do think the foliage on the competition looks a bit better. Maybe something in-between would have been the best result. I like the Note9’s processing here a tad more, while detail wise both the phones are neck-in-neck.

Click for full image
[ iPhone XS ] - [ iPhone X ] - [ iPhone 7 ] - [ iPhone 6S ]
[ Galaxy Note9 ] - [ Galaxy S9+ ] - [ Galaxy S8 ]
[ LG G7 ] - [ LG G6 ] - [ LG V30 ] - [ OnePlus 6 ]
[ Mi MIX2S ] - [ Pixel 2XL ] - [ P20 Pro ]

In this shot, while the iPhone XS has more contrast in the shadows, it actually seems to lose a bit of detail versus the iPhone X – something you can see in the darker brickwork on the left bridge. In other parts of the scene, the XS is superior, and resolves a lot more detail in the barks of the trees on the right.

Samsung and OnePlus both had less issues in the shadow-cast bricks, and both provided an overall brighter image, although if that’s a positive is a thing of preference. Personally I do prefer the OP6’s HDR a lot here as it just does a better job on the brickwork.

Click for full image
[ iPhone XS ] - [ iPhone X ] - [ iPhone 7 ] - [ iPhone 6S ]
[ Galaxy Note9 ] - [ Galaxy S9+ ] - [ Galaxy S8 ]
[ LG G7 ] - [ LG G6 ] - [ LG V30 ] - [ OnePlus 6 ]
[ Mi MIX2S ] - [ Pixel 2XL ] - [ P20 Pro ]

Hopefully we’ve had enough sunlit scenes for this page, so moving on to more levelled scenarios.

The very first thing that pops out in this image between the iPhone XS and the iPhone X is that the XS no longer blows out the sky, and we actually see some blue.

While overall exposure and colour balance in the scene is similar, detail retention on the iPhone XS is significantly better. Here the XS is able to resolve cracks and textures on the walls that were invisible to the X.

While the XS stands out against the X in terms of details, it still falls behind the Samsung phones as both the Note9 and S9 do better on the textures of the buildings.

Battery Life Camera - Daylight - More HDR & Portrait
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  • peevee - Monday, October 15, 2018 - link

    "we see four new smaller efficiency cores named “Mistral”. The new small cores bring some performance improvements, but it’s mostly in terms on power and power efficiency where we see Tempest make some bigger leaps"

    So, is it Tempest or Mistral? Or both?
  • Ryan Smith - Tuesday, October 23, 2018 - link

    It's Tempest. Thanks for the heads up!
  • peevee - Monday, October 15, 2018 - link

    "upgrade in sensor size from an area of 32.8mm² to 40.6mm²"

    These are not sensor sizes, these are total image chip sizes.
    Sensor (as in "sensor", the part which actually "senses" light) sizes are not hard to calculate, and are MUCH smaller.

    12MP is approx 4000x3000 pixels.
    The old sensor had 1.22 µm pixel pitch. 1.22*4=4.88mm. 1.22*3=3.66mm.
    So old sensor was 4.88x3.66mm = 17.9mm².

    The new sensor is 5.6mm x 4.2mm = 23.5mm².

    This is is comparison to

    - typical cheap P&S camera sensor size (so-called '1/2.3" type') of 6mm x 4.5mm = 27mm²
    - high-end P&S camera sensor, (1" type) of 13.2mm x 8.8mm = 116mm²
    - Four Thirds camera sensor size of 17.2 x 13mm = 225mm²
    - Modern pro camera sensor size of about 36x24mm = 864mm².

    Please do not confuse your readers by calling total image chip sizes as "sensor size".
  • peevee - Monday, October 15, 2018 - link

    "The performance measurement was run in a synthetic environment (read: bench fan cooling the phones) where we assured thermals wouldn’t be an issue for the 1-2 hours it takes to complete a full suite run."

    Which makes the whole thing useless. Of course wider (read hotter and less efficient due to higher overhead of often-useless blocks) will run faster in this environment, unlike in user hands (literally, ~36C/97F plus blanketing effect).
  • Andrei Frumusanu - Monday, October 22, 2018 - link

    It changes absolutely nothing. It will still reach that performance even in your hands. The duration of a workload is not orthogonal to its complexity.
  • viczy - Sunday, October 21, 2018 - link

    Fantastic and in-depth work! Thanks for the data and analysis. I would like to know a little more about your method for energy and power measurement. Thanks!
  • techbug - Friday, November 2, 2018 - link

    Thanks a lot Andrei.

    L2 cache latency is 8.8ns, Core clock speed is 2.5GHz, each cycle is around 0.4ns, then the l2 cache latency is 8.8ns/0.4=22 cycles. This is much longer than Skylake, which is around 12 cycles (taking i7-6700 Skylake 4.0 GHz at https://www.7-cpu.com/cpu/Skylake.html as an example, it equals to 3ns L2 cache latency).

    So L2 latency is 8.8ns versus 3ns in skylake. Is this comparison correct?

    I cannot tell the precise L1 latency from the graph "Much improved memory latency". Can you give the number?
    According to Figure 3 in https://www.spec.org/cpu2006/publications/SIGARCH-... the working set size of 80% SPEC2K6 workload is larger than 8MB, A12 's L2 cache (8MB) won't hold the working set. Compared with 32MB L3 cache Skylake configuration.

    So overall the memory hierarchy of A12 seems not comparable to Skylake. What else helps it to deliver a comparable SPEC2K6 performance?
  • demol3 - Wednesday, December 5, 2018 - link

    Will there be a comparison between XS-series and XR or XR review anytime soon?
  • tfouto - Thursday, December 27, 2018 - link

    Does XS has a true 10-bit panel, or uses Frame Rate Control?
    What about Iphone X?
  • Latiosxy - Wednesday, January 23, 2019 - link

    Hello. I just wanted to criticize the way this site works. It’s hard to read while listening to music when your intrusive ads follow my screen and interrupt my audio consistently. Please fix this as this has been really annoying. Thanks.

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