Capture Latency

Along with its own rear facing camera sensor, the GS5 adapts a dual-mode autofocus system. Traditional AF designs in smartphones rely on testing contrast differences in order to determine when a point is in focus. With GS5, Samsung introduces a second mode: phase detection auto focus. Instead of relying (primarily) on contrast to determine focus, PDAF splits incoming light and compares intensity patterns to determine focus direction.

Low light scenes and scenes that can't generate appropriate phase info will default to contrast AF. PDAF appears to work across the camera's FOV although I did notice that the fastest AF times almost always happened in the center of the display.

Samsung claims a 300ms AF time thanks to its phase detection AF. In order to validate that claim I pointed a camera at a bunch of phones and measured AE/AF latency while preparing our ISO 12233 target shots from the previous page. 

I measured from the moment I tapped the focus target to the time the image stopped moving (I didn't rely on the AF lock indicator as some devices report focus lock prematurely). There's a bit more variance than I'd normally like in these numbers due to the nature of the capture, although I'm working on getting a higher speed camera to smooth some of that out.

Camera AE/AF Latency (Shooting ISO 12233 Target)

The GS5 definitely runs its AE/AF routine quickly, basically tying the M8 at the top of the charts here. The improvement over the GS4 is substantial, and there's even a big advantage over Apple's iPhone 5s. Note that if you move to lower light conditions you can see this number at least double, but that's something that impacts all of the devices here.

The Z1s is pretty frustrating because it has a great imaging system but an absolutely terrible camera UI. Focus speed is pretty bad compared to anything else here, basically on par with the iPhone 5/5c. 

The shortest time to focus I was able to record on the GS5 was 450ms in a different test scene, compared to 516ms for the M8. The GS5 can definitely be a hair faster but I found the M8 to be comparable if not slightly quicker overall.

Focusing is just one piece of the puzzle, I also measured capture latency as well. Here I'm looking at the time between when I tapped the capture button on the screen and when the camera UI was ready to take another shot. 

Camera Shot Latency (Shooting ISO12233 Target)

The GS5 remains solid, but here Apple actually pulls ahead. The 5c (and 5 by extension) are actually at the top of the charts here. Apple does some more work upon capture on the 5s, which is the only reason I can think of for the discrepancy here. Either that or the NAND on my 5s is in a dirtier state, impacting capture performance. 

Either way there's a huge improvement in capture speed compared to the GS4. Capture latency is one area where the Nexus 5 is absolutely horrible in. The latest updates made AE/AF reasonably responsive, but the capture latency kills the experience on the N5. 

This next chart combines the previous two values to give an overall picture of capture latency on these devices:

Camera Latency (Shooting ISO12233 Target)

Samsung's PDAF and ISP companion seem to do their job well as the GS5 is substantially quicker than the GS4 at image capture. That being said, HTC's M8 is slightly faster by comparison. 

Camera Architecture & Still Image Analysis That Fingerprint Scanner, Again
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  • Blairh - Wednesday, April 9, 2014 - link

    * 30 grams less than the M8. Substantially shorter too.
  • az06093 - Wednesday, April 9, 2014 - link

    Where's the video analysis?
  • xmen77 - Wednesday, April 9, 2014 - link

    S5 best
    Display
    S5 improved super amoled
    z2 ips on the color RGB lighting with the addition of red and green phosphorus in diodes
    All new one ips on the white backlight
    M8 have the same quality as in the display М7
    Cool backlight Z2, expanding the color gamut and "improves the shades",
    actually distorts the color because all the images are designed for
    standard sRGB and an extension will only be in the negative. Although
    the display is still better than the HTC M8.
    Amoled gradually improved and now he has lost almost all the shortcomings, there was only slight, noticeable only during the rapid motion of the screen (in front of screen) "modulation" at low brightness at maximum (it is comfortable in all conditions) this "modulation" No, I do not know why samsung does so in LG G Flex is no such (there is also amoled)
    In OLED (Amoled) white whiter IPS, faster response in comparison to LCD
    (hundreds of times better than LCD), contrast and black level is perfect
    (hundreds of times better than LCD), colors
    do not mix with each other,, ideal viewing angles.
    Oversaturated color removed using a cinema mode
    blog.gsmarena.com/samsung-details-new-galaxy-s5-display-panel/
    phonearena.com/news/Samsung-details-its-new-Galaxy-S5-display-the-brightest-most-efficient-OLED-screen-to-date-can-hit-698-nits_id54767
    phonearena.com/news/Display-Mate-Samsung-Galaxy-S5-has-the-best-performing-smartphone-display-that-we-have-ever-tested_id54583
    i-cdn.phonearena.com/images/articles/116013-image/Samsung-Galaxy-S5-HTC-One-M8-Sony-Xperia-Z2-LG-G-Pro-2-0122.jpg
    i-cdn.phonearena.com/images/articles/116012-image/Samsung-Galaxy-S5-HTC-One-M8-Sony-Xperia-Z2-LG-G-Pro-2-012.jpg
    i-cdn.phonearena.com/images/articles/116009-image/Samsung-Galaxy-S5-HTC-One-M8-Sony-Xperia-Z2-LG-G-Pro-2-009.jpg
    ixbt.com/mobile/images/samsung-galaxy-s5/vs-pict-angle-l.jpg
    ixbt.com/mobile/images/samsung-galaxy-s5/vs-white-angle-l.jpg
    hi-tech.imgsmail.ru/hitech_img/source/cf/dc/746f7c86490ffdb8e93c035d5e62.jpg
    Camera
    S5 1/2.6 isocell phase autofocus 6 lenses
    z2 1/2.3 bsi 5 lenses
    one 1/3 bsi 4 lenses
    At S5 even crude firmware (new sensor) better color, detail and less noise
    The rest of at the final firmware is very bad, especially in HTC
    eprice.com.tw/mobile/talk/124/4899661/1/rv/sony-xperia-z2-review/
    eprice.com.tw/mobile/talk/124/4899662/1/rv/sony-xperia-z2-review/
    4pda.ru/forum/index.php?showtopic=515584&view=findpost&p=30435226
    Waterproof
    S5 ip x6
    Z2 ip x7
    one ip x3
    Bezels
    S5 is more or less thin bezels
    Z2 more or less thin bezels
    one big bezels
    Performance
    S5 2048 MB RAM (Dual-channel) LPDDR3
    Z2 3072 MB RAM (Dual-channel) LPDDR3
    M8 2048 MB RAM DDR2
    phonearena.com/news/HTC-admits-its-High-Performance-Mode-pumped-up-benchmark-scores-for-the-HTC-One-M8_id54509
    Body
    Metal is bad for the connection know about it all in the industry, aluminum is not a premium material, it is used for beer cans. At s5 soft touch texture like nexus7 instead of glossy plastic s4
  • doobydoo - Friday, April 11, 2014 - link

    Troll post. You say plastic is used for beer cans - plastic is used for trash bags.

    Aluminium is preferred.
  • TheSailorMan - Sunday, April 13, 2014 - link

    "Preferred" for what? For helmets?? For car bumpers??? .......
    Aluminum is is the WORST material for smartphones. In many ways.
    And YES , same drink in plastic bottle cost more than , if it is in cans. Check it out.
    Plastic is MORE expensive than ALUMINUM. Check out this , too
  • Streamlined - Thursday, April 17, 2014 - link

    Samsung Fanboy alert. Metal is far superior to plastic for heat dissipation alone. Not to mention it's more durable. And on what world is plastic more expensive than Aluminum?
  • doobydoo - Friday, April 11, 2014 - link

    And the metal phones have no problem with connections, either.
  • ESC2000 - Sunday, April 13, 2014 - link

    You just keep telling yourself that. The iPhone has documented connectivity problems. See eg
    http://m.digitaltrends.com/mobile/iphone-5-problem... That list further notes that the aluminum chassis is prone to scratches (an apple VP says it's normal and to be expected... Not on my $800 device... Figure out how to prevent it). That list also notes the extreme battery drain problem I experienced on my iPhone 5, which died overnight the first night I owned it (failing to wake me up in the process). Owning an iPhone was a very underwhelming experience for me. After six months I dumped it for a note 2 and then a nexus 5 and have been much more satisfied. And my phone doesn't look like it's been to war like, for example, my stepfather's which has many dents and scratches.
  • pandemonium - Wednesday, April 9, 2014 - link

    It seems silly to me that you don't have a Lumia 1020 and a DSLR in your photo bench marking.
  • crbandiera - Wednesday, April 9, 2014 - link

    Very solid r review. Thanks for the useful balanced review. The information and your style as writer is refreshing as I am often times caught forced to ignore reviews due there extreme bias. I feel better equipped to make a purchase and that my expectations of what ever device I choose will be more realistic. Thank you for doing your job well.

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