The latest iPhone 5 photo shows a separated LED flash. But does that really make any sense?
Rumor has it that the iPhone 5 is due to get an upgrade on its rear-facing camera, bumping up to an 8-megapixel design. But new purported, leaked photos of iPhone 5 parts and cases show what looks like a LED flash on the other side of the device. Where’s the logic in this new design
The tech media is currently abuzz with newly-surfaced photos of cases and backplates that
seem to show an LED flash that is positioned on the other side of the supposedly new iPhone 5 design. There is a great deal of excitement and anticipation surrounding this new development, with iPhone enthusiasts anticipating a dramatic shift in the iPhone 5′s rear-facing camera array, which is already purported to be getting an 8-megapixel upgrade.While few are questioning the voracity and reliability of the photos and sources, even fewer are scrutinizing the logic of a separated LED camera flash, and what the basis would be for Apple to shift the iPhone’s camera flash so dramatically far away from the sensor itself.
The few theories on why the iPhone 5 could feature a separated LED flash are seemingly logical at first glance: we all know that there were light issues with the camera sensor on the white iPhone 4, and even flash and camera issues with lighting on the original iPhone 4 back in the Summer of 2010. It would be easy enough to assume that moving the LED flash to the other side of the iPhone 5 would somehow solve the problem.
But given the lights limitations of LED flashes, this seems doubtful at best.
While LED flashes have become increasingly popular on smartphones, the light that they emit is still not as bright as other flash forms, such as a Xenon flash. As a result, the camera flash from a LED is sometimes not bright enough to fill the photo with ample light in low-lit conditions. This is why devices like the iPhone (and all other smartphones with rear-facing cameras) have positioned the LED flash in close proximity to the sensor; it’s a way of maximizing the amount of light that ultimately enters the camera, as reflected off of the subject.
By definition, moving the camera flash away from the sensor on the iPhone 5 would put an already lesser-lit flash at a farther distance from the sensor — and at a greater angle to the subject being photographed. It’s hard to believe that moving the LED flash could ultimately help in this regard — unless the new flash turned out to be something of the Xenon type.
Shifted LED Flash on the iPhone 5 To Eliminate Red Eye?
Another theory suggests that the moved LED flash on the iPhone 5 could be to counteract red eye. But this new design seems dubious as well.
the Nokia Astound's 8-megapixel camera sensor array with dual LED flashes.
It is true that red eye is caused by red light being bounced back off of the irises of people into the camera, which is often caused by on-camera flashes that are in close proximity to the sensor or shutter. But in order to truly eliminate red eye, the flash source would need to be sufficiently far from the optical axis of the camera, and it is doubtful that moving it a couple of inches to the right would do the trick. In order to reduce red eye, it would make more sense for Apple to further refine the use of a pre flash on the iPhone 5, a technique that causes a person’s irises to contract, thus minimizing the bounce-back of red light.
HTC's Evo 4G also has two LEDs in close proximity to the sensor.
Does An 8-Megapixel Camera Require That the LED Flash Be Farther Away?
Finally, perhaps the moved flash on the iPhone 5 has something to do with the addition of a 8-megapixel camera? That could be the case, however, to date, no other 8-megapixel smartphone sports a separated LED flash like the one that is purported in the photo. The Nokia Astound features not one, but two LED flashes right next to the sensor. The same goes for Nokia’s N86.
But it isn’t just Nokia that is using this camera and LED flash set-up. HTC is doing the same thing with their Evo 4G. Like the Nokias, it features two LED flashes in close proximity to the camera sensor.
What is apparent from these other smartphones with 8-megapixel cameras is that the 8mp sensors need more light, and they need that light relatively close to the sensor in order to avoid grainy photos. If this is the case, then why would Apple continue to use just one LED flash for an 8-megapixel camera, and put it on the other end of the rear plate?
Newer iPhone 4 case designs account for the LED flash so as not to interfere with it . . .
Separated LED Flash Could Lead To a New Photo Discoloration Problem on the iPhone 5
As we have reported in another article, photo discoloration was an early problem on the iPhone 4, and more than a few theories abounded as to why this was the case. While some suggested that it was the result of a software issue in how the iPhone 4 processed yellow light, others postulated that many photo discoloration problems were caused by iPhone 4 case designs, which were too hastily retro-engineered from iPhone 3Gs designs and did not account for the LED flash. As a result, some of the cases came too close in contact with the LED flash and resulted in partially concealing the flash strobe.
Anyone who has ever accidentally had a part of their finger over the flash of a camera knows how it can discolor a photo.
This purported iPhone 5 case -- and separated LED flash -- might discolor photos.
Newer iPhone 4 cases have re-designed the camera lens cutouts around the iPhone 4′s sensor and flash so as not to conceal it. However, in the recent purported photo of the iPhone 5 case, the cutout for the LED flash would be closely cropped to the flash itself, lending to the theory that photos could easily become discolored. Another unknown is what the effect of having such a expanse of colored case between the sensor and flash would cause — could it lead to further discoloration?
It is possible that Apple has a new patent for an LED camera flash that will be bright enough to be positioned on the other side of the iPhone 5. But I have combed all of the Apple patents, and I can find nothing to suggest this. I remain skeptical of all purported “leaked” photos of the iPhone 5 — and these recent ones are no exception.
Photo enthusiasts: what do you think? Can you find any evidence out there to suggest how this new camera array would make any sense for the iPhone 5? We’d love to hear from you, and start a discussion on whether or not these new photos make any real sense
Source article : http://iphone5newsblog.com
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