OIS & EIS in Zenfone 3
Today, I'd like to introduce you to my second post on Android Central. Like the earlier post, this post revolves around Zenfone 3, too! A camera enthusiast, I'd like to talk about the device's key camera features, which I believe really stands out. Not sure, how many of you would agree with me, but just a perspective!
Before I could go ahead with the device's camera details, let me introduce you to the basics of Photography!
How we should ideally shoot a photo: Look or select a subject of our choice, compose a good frame, focus over the subject, and finally control and balance the shutter speed and aperture, following which you could shoot! FYI, this is just the little we can see and witness on the out, but there's so much happening on the inside while we begin to shoot the picture. Let me take you through something that you may have probably missed out on:
The very second you press over the shutter button , not only would it open up but would also let in light, as per the shutter speed given. Whatever however happens during this process is that even the slightest shake or blur would result into a blurry image. Here's how the blur takes place: When you click the shutter button, the shutter immediately lets in light, during this process, the slightest shake will hamper the shutter from the process and will therefore deliver a blurry image.
OIS (Optical Image Stabilization)
In situations, such as mentioned above, the only solution to such blurry images is OIS. The Zenfone 3 fortunately comes with OIS, how awesome is this right? Although, before we could begin understanding the working of OIS, let's understand how the shutter speed works.
I often look at the Shutter Speed as a mouth that opens and closes as per the speed assigned by the person. In other words, higher the shutter speed, the less light it would let in. When you shoot with a high shutter speed, you would not end up with a blurry image. However, when it comes to a low shutter speed, because the shutter stays open for long, it lets in more light and therefore increases the chance of a shaky image.
Moving on, Let's now understand how the OIS works:
What's the Role of OIS and how it could better your Zenfone 3 Camera Experience?
Let's admit the fact that we're human are bound to error, especially when it comes to the camera. We cannot always control or shake unless we make use of a super stable platform or tripod to shoot. However, OIS in such situations could help rescue a shaky image. If you're wondering how, little help you with this bit: OIS works through something called gyroscopic sensors that are seen within the lens. The main function of the gyroscopic sensor is to sense if the image and sensor aren't aligned as it should.
What the OIS system does is that it further makes use of two gyros within the lens, usually for Pitch(camera rotation from left to right) and Yaw(Up and down movement).
Here's a little demonstration I picked up from one of the ASUS write ups.
As you can see in the image above, both images have been tested with the OIS and without. You'll be able to tell the difference
Here's an additional demonstration to help you understand how OIS works! (Video clip picked from an ASUS related article)
EIS (Electronic Image Stabilization)
If however, you're someone who loves working with videos, like I do, sometimes, the Zenfone 3 still makes a good choice. Based on my hands on with the phone, I can personally say that it's great with videos. This is because the device comes with the EIS feature.
Here's how Zenfone 3 would better your video experience:
Unless you've got real steady hands or own a tripod, you're going to end up with shaky videos.
This is when the EIS function comes handy. Through the help of a light sensing chip, the EIS system reduce possible shakes or moves. Just for your knowledge, Videos are actually made up of endless images that come together and make a video. Once the image makes its way to the chip and if a camera shake is detected through the sensors and is comprehended by the system, it responds immediately by moving the image accordingly. Example: If the camera shakes towards the right during a pan or otherwise, the system will eliminate or correct this shake by moving it to the left.
Here's a small demo to help you understand the stability seen through EIS in videos:
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