MobileTech Explained

Camera, Lens, Sensor, Aperture, OIS, Focus, Image Processing | TechBuf

When we compare two smartphone cameras, there are certain terms such as camera, sensor, aperture, lens, OIS, focus, image processing etc in the specification, which are difficult to compare when we do not have good knowledge about the term. In this post, I will discuss all the terms of the camera. Read the post hopefully; you will learn new something. You may also like Machine Learning | Teach The Computer.

Camera sensor

Camera sensor

The most important part of any camera is the sensor. There are usually two types of sensors available on mobile phones,

  • One is CMOS, and
  • Another is BSI.

BSI sensor is slightly better regarding low light performance compared to the CMOS sensor. And above all, a blinking image will make ready for you. The BSI sensor is flipped, so the light that is inserted into the camera goes behind the sensor, and the light is very low in reflectivity, so the image quality seems good.

There is another term in the sensor, which is also important, is the sensor size. See each sensor has a number to describe the size. Such as o / 2.3, 1/2.6 etc. So easy to understand, the number of figures with one fraction will be as small as the size of your sensor. And the size of your sensor will be bigger, and you’ll get big pixels. And the larger the pixels, the image will be even more enlightened and shiny.



Now talk about the aperture. You may see that the aperture of the camera is displayed by f / 1.8, f / 2.0, f / 2.2, etc. numbers. But what are these? The f in this number is the focal length of your camera lens. The number that is below is that the opening of your camera means that the holes in the camera (through which the light enters in the camera) and its diagram. This number is a ratio between the focal length of your lens and the opening of the camera. It has the option to adjust where there is a large DSLR camera manually. But it will not be able to adjust the mobile phone manually. The aperture of the company’s default is always available.

One simple thing is telling you, to know which aperture is better. That the number of the aperture (small letter f after the aperture). If the aperture is smaller the opening of your camera will be larger. And as the opening starts, your camera will be able to lift low light photos as well. You can also see the graceful Defied Off field effect. You saw that the pictures of the subject are clear while you are taking pictures and there is a dull effect behind the subject, the less the aperture number of your camera, the effect can be found to be as good.

Some article you may like




Friends, let’s talk about the lens. The lens is not a major factor in camera to compare. There are 5 or 6 element lenses available on mobile phones. Some mobile phones use the large brand lenses, such as sniper optics or Carl Jets optics. The lens is not an important issue, and it is a little difficult to compare so you can also ignore this issue.


Let’s talk about the camera’s OIS technology. I’ll post a separate post about the OIS details. Now let’s know about some basic things. Many times when you take photos, your hands shake a little bit, and the picture becomes dark. But if you have an OIS feature on your camera, it can be possible to get good pictures even if shake your hand. As a result, you will also see the low light performance. When you are recording videos if you have OIS, there will be possible a fixed video recording without shake. It is a good thing to have OIS in your camera. If you have OIS on your camera, it’s a benefit for you.

Focus Technology

Focus Technology

You may hear many names about focus technology. Such as

  • Laser Auto Focus,
  • Face Detection Auto Focus and
  • General Auto Focus

Laser Auto Focus

Laser Auto Focus is the most advanced technology among these three focus technologies. It is a small part of the side of your phone’s camera. Together they spread many laser beams across a large area. And these beams came back after being pushed back to the subject. Imagine that the autofocus of laser is taken in front of you. Some of the beam out of this focus will be shocked with your body, and some beam will get back to you by pushing the environment behind you. Your phone determines the exact location of the subject depending on the distance between the two types of the beam and the time it takes for return.

Accordingly, it helps to move a camera lens and draw a focused image. Similarly, when you tap-to-focus on a laser auto-focus phone, you tamper your phone’s laser where you tap on it. Depending on the time of the return of the beam, it determines the distance of the object and helps to focus the focus on moving the camera lens on it.

Face Detection Auto Focus

Now talk about face detection autofocus. Face Detection Auto Focus is available with iPhone and Samsung. What happens in this technology? The sensor on your phone is a detection of the incoming light from the object. The object from which the light reaches the camera, the camera tries to lock the focus depending on the light.

General Auto Focus

Now let’s talk about the general autofocus which we saw in almost all the normal cameras. It is a contrast based technology and tries to focus on the contrast level between you and your background. Does not have any laser beam or face detection technology and it will focus when you want and tap on focus. Sometimes it takes a little late to focus. In low light, flash fires to make it look good because it is quite difficult to focus on the contrast in low light. For this, it illuminated the environment by flash and process the image by filling the focus.



There are three types of flash in the camera flash.

  1. Single LED flash,
  2. Dual LED flash, and
  3. Dual-tone flash.

Some Nokia and Sony’s phone Xenon Flash was available, but today it is not seen anymore. Single LED flash means that it has a LED. When you flash, this LED will produce its lights, and you will get the picture. Dual LED flash means there are two LEDs so that you can see more light in a flash.

Two LEDs have a dual tone flash, but there are two different color alarms. One has a raw type, i.e., blues and another is a worm type, i.e., Yolo. By combining these flashlights and according to the subject, it mixes one light with an average of one color, and you see an original photo.

Some article for you

Image Processing

Image processing system is an important issue for each camera. It’s not a device; it’s software. Different Company uses different technologies for image processing. Apple image processing software is excellent; there are no more options for the camera on the phone, just press timer set the flash on off. But when you take photos, Apple processes that photo so well that the output comes very well.

Samsung’s phones found that the image was more colorful when the image was processing. Sony and LG phones make their images much sharper; absolutely no natural images can be seen. Image processing is a system where bad images can be made better, and if your camera has a lot of good parts, but your image processing system is not as good then you will not see good image output. For this reason, if all the specification of two smartphone cameras is the same, but if the image processing system is different, then two phones will not be able to take the same photos.

The last word

Hopefully, after reading this post, you can choose your new camera phone, and you can compare it very well with other phone cameras. Yo can read about display Technology different between IPS, AMOLED & Retina. If you need to see the reviews of the phones, see which aperture is good, whose image processing software is good and take care of these issues and purchase your new phone. If you like the post or get benefits by reading, please share and comment on any of your questions.

Do you like this article?

[wysija_form id=”1″]

Shushanta Kumar

Founder and CEO of TechBuf blog, also a regular TechBuf contributor. I'm a pretty skilled writer. Try to increase Tech related content.

4 thoughts on “Camera, Lens, Sensor, Aperture, OIS, Focus, Image Processing | TechBuf

Leave a Reply

Your email address will not be published. Required fields are marked *