Entries tagged as iPhone 7

Today’s “The Toon-Box”

Today’s “The Toon-Box”

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How loud is the camera if an iPhone's from Korea or Japan?

Measuring the camera shutter sound of the iPhone 4S with the iPad Pro 9.7"

In Korea or Japan, loud camera shutter sounds from smartphones are a fact of life due to the voluntary standards for the camera-equipped cellphones meant to ease privacy concerns. Issues had already been raised as far back as 2001 in Japan and Korean government started taking action in 2003. These standards call for a mandatory shutter sound of certain loudness even in silent mode. In Korea, sound level is set to be between 60 and 68dBA.

Note that this is not mandated by law in either countries, so there is no legal repercussion for not honouring the standards. Still, it poses an annoyance in many legitimate circumstances, something that users in other countries would never encounter. Imagine that the phone will make a loud sound whenever you take a photo or a screenshot(!) even in silent mode. There are 3rd party camera apps that try to avoid the sound, but for the screenshots you would ultimately need a system-level hack. This means jailbreaking or finding an obscure bug/feature.

I noticed that this problem has been exacerbated on the iPhone 7 series because it is using two speakers instead of one. You'll now get to hear the noisy shutter sound even louder, in stereo. To get an objective picture of the situation, I brought out my iPhone collection for a round of sound level measurement for the camera shutter sound. Here's how they stacked up.

Camera Shutter Sound
The test was done by measuring the sound using the "Decibel 10th" app on the iPad Pro 9.7". Tested iPhone was 40cm(16") away from the iPad's microphone. To human ears, an increase of 10dB is felt as the sound being twice as loud. This means that the integrated speaker got roughly two times louder since iPhone 5 onwards. Incidentally, this would've been necessary to meet the aforementioned Korean standards. The 60dB level must be attained at a distance of 1m(3.28'), and there is a decrease of 8dB for moving from 40cm to 1m. Taken together, it becomes obvious that the iPhone 4S and earlier models wouldn't be loud enough.

And as expected, iPhone 7 I bought in Japan was the loudest, even though the second speaker was facing away from the iPad's microphone. One consolation is that the sound heard by the subject isn't much louder than before; you only hear it as being much louder because the second speaker is facing you.

Meanwhile, the iPhones bought in the United States turned out to be relatively quieter even when the volume was set to the loudest. In fact, my iPhone 7 Plus had a very quiet shutter sound even though music playing on it was quite loud in contrast. This shows that Apple is intentionally boosting the speaker output beyond normal levels when the shutter sound is made on the Korean and Japanese models. It would be difficult for those who haven't used these models to realize how loud they are.

If you want to hear the difference for yourself, here's the video of the test that the results are from. If anyone had been wondering why I still try to get iPhones from the United States, this should be the answer.

Performance of the telephoto camera on the iPhone 7 Plus

With the official release of the iPhone 7 series in Korea set to be on October 21, just a week away as of this writing, I've been asked about how different the iPhone 7 and 7 Plus are. This is because I own both. If we disregard the obvious differences that come due to the size (e.g. screen resolution, weight, and battery), the camera is still a key differentiator. It used to be that only the Plus got the Optical Image Stabilization (OIS). This year, the smaller model got that as well, so the perk for the Plus model is an additional camera module in telephoto mode that provides 2x optical zoom. Naturally, I wanted to see how good it was. I should note that the wide angle camera on both 7 and 7 Plus are identical. Keep reading if the extra camera is worth the trouble.

Clarity of the iPhone 7 Plus cameras - outdoors (top) and indoors (bottom), for wide angle (left) and telephoto (right)

Original Photo ISO Shutter Speed
Wide Angle - Outdoors 20 1/2740
Telephoto - Outdoors 20 1/1140
Wide Angle - Indoors 20 1/879
Telephoto - Indoors 20 1/372

When there is sufficient light, the telephoto camera provides excellent results. You can basically zoom into stuff and see it closer in more detail. I've been using this a lot outside with satisfactory results. But after a while I began to see a lot of limitations as well.

Closest macro shots for the iPhone 7 Plus cameras - wide angle at 8.5cm (top) and telephoto at 28cm (bottom)

Original Photo ISO Shutter Speed
Wide Angle 25 1/40
Telephoto 64 1/60
For one thing, it won't work with an object that's too close to you. This isn't surprising at all if you've used zoom lenses on a camera. Longer focal length tends to come with longer minimum focusing distance. The wide angle camera can focus on an item as close as 8.5cm (3.3") away, but the telephoto camera can only do up to 28cm (11"). To get a macro shot, always stick to the wide angle.
Continue reading "Performance of the telephoto camera on the iPhone 7 Plus"

Comparing iPhone 7 camera with older gen (Indoors)

Continuing from the last post, let's look at the indoor performance of the front camera. I took photos of a table in the living room where the kids have built what's essentially a toy village with Lego blocks. It should serve to show differences in colour reproduction, if any.

Front camera - iPhone 4, 4S, 5, 5S, 6 Plus, 6S Plus, and 7

Original Photo ISO Shutter Speed
iPhone 7 80 1/30
iPhone 6S+ 32 1/17
iPhone 6+ 64 1/30
iPhone 5S 80 1/30
iPhone 5 64 1/30
iPhone 4S 160 1/60
iPhone 4 125 1/60
With the exception of iPhone 4, the colours look more or less correct, which is good. Also, the iPhone 7 did manage to take clear photos when the objects are closer, so it's doing a good job as its intended role of a selfie camera. 6S Plus result is fuzzier, but this time it can be attributed to a slight camera shake and would likely be nearly as good as 7 but with less pixels otherwise.

Next up, I took shots of the same scene with the rear camera, once with good indoor lighting and once with faint indirect lighting so I could observe how much noise can be seen for each cases. For the darker shots, I tried to have the camera maintain at or close to ISO 800 to make a close comparison.
Continue reading "Comparing iPhone 7 camera with older gen (Indoors)"

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