What to look for when buying a mobile phone?
(Part III)

Camera

Have you ever noticed that if you look at a bright flashlight, your eyelids get smaller?
And if the light diminishes like darkness in the evening
Then your eyelids get bigger
In the world of cameras, this is known as aperture and variable aperture
Today we will see what is the sign of a good camera in mobile
And what should we keep in mind when buying a good camera phone?

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The camera now has two main functions
Photo
video
The question is, does the megapixel increase the camera quality?
The answer is 80% no
But know that with the help of megapixels you can record four or eight videos
Yeah Al that sounds pretty crap to me, Looks like BT aint for me either
With three megapixels you can print good photos
While the same is twelve megapixels, you can print a photo larger than twelve inches
Similarly, if you want to put a banner on a building, you need more megapixels
Megapixels are more common in photography
Because even if we crop the image of eight and make it four, we will get good result because it will have more megapixels.
But ninety-nine percent of people don't need these things
So understand it in simple words
That megapixels do not improve your image quality
Let me give you an example
iPhone 11 Pro Max
Camera at the moment
Only
12 mp
Of
When compared to that
Samsung S20 Ultra
Camera
108mp
Of
But the result of iPhone is better than Samsung
It's different because Samsung has more megapixels
8k video recording
can do
While the iPhone only because of the low megapixel camera
4k video recording
can do
Ordinary people should understand that having more megapixels does not mean that the camera will be good
Now the question is what would be a good camera?
Three things are very important for a good camera
Sensor size
Aperture
Software
And the processor is definitely a little interfering
The larger the sensor size of the camera, the more light it will be able to absorb
And that's how good the image result will be
Usually mobile sensors
1.x um
Measured in micrometers
That is
1.5 um
Most companies do not specify censor size
You can usually find information about censor size on any good mobile website
Comes second
Aperture
Like I gave you the example of the eye
Think of the aperture of the camera as the eyelid
The aperture of the camera is written in F-stop
F represents the focal length
The lower the aperture value, the larger the aperture of the camera
Consider this as an example
f / 1.4
Aperture lens
f / 1.9
Is better than
Aperture is the opening point through which light passes through and hits the camera sensor
Now the more open the aperture
The light will go so high
The camera will perform so well in low light
Understand this for the average user
The smaller the aperture value, the better the camera
Let me give you some examples of aperture values
f / 2.4
f / 2.2
f / 2.0
f / 1.8
f / 1.6
Which of these aperture cameras would be good?
Now we come to the part where we talk about the middle ground
Which improves camera quality by 30 to 40%
And that's software!
If you think the software has nothing to do with the camera, you are wrong
Photo processing algorithm
Create and distort images
You understand the example
Google Pixel devices
Ever since Google started launching mobiles
The first three models were launched by Google with just one camera
However, at that time all the mobile companies were giving three or four cameras
Google calmly provided a camera
And with one camera, all the cameras were left behind
Pixel 3a
There was a four hundred dollar phone that embarrassed a thousand dollar iPhone and Galaxy phones
The only reason for such good camera quality was the software
Google used image processing to create the perfect algorithm that made the image stand out
All companies with double triple camera
Depth camera
Depth Camera, Bokeh Camera
She was giving good portraits
But Google proved everyone wrong
That good portraits can only be created with software
And can be made better than your camera
Let me tell you something off the record here
That all the mobile companies that are offering these four cameras together with these two megapixel depth sensors are fraudulent companies.
Many companies' censors are just stickers
Four-camera talk is a waste in most budget ranges
In the name of depth sensors in particular, most customers are fooled
Now back to the topic
Google is currently developing the best software
The iPhone's software then adds four moons to the camera quality
Third is Huawei
Samsung comes in fourth
One plus on the fifth
Xiaomi on the sixth
And so the Oppo Vivo comes later
Comes now
Processor talk about how the processor improves the camera quality
In the processor
An image signal processing unit is attached
Which, of course, made the video an overnight sensation
Simply put, the better the processor
Image quality will be so good
Let's talk now
Optical image stabilization
Optical image stabilization (OIS)
And
Electronic image stabilization
Electronic Image stabilization (eis)
Of
In mobile
ois
Is given
Its camera sensor is fitted with a kind of gyroscope
Which also gives the camera a light touch according to the movement of the mobile
While
eis
Works with software
In which
Dave is digitally cropped and stabilized
Now what is the purpose of both?
she is
Stabilization
This means that if you are recording a video holding a mobile phone in your hand, your video should not feel shaking
They looked perfectly smooth
ois
Mobile phones are expensive
While
eis
Can be done with software
But in the budget, it is also found mostly in Xiaomi's mobiles
Now we come to the part where we talk about the middle ground
So at the moment the best quality video is given in the iPhone 11 series
But the iPhone only
4k
Returns the video
High resolution video
That is
8k
Samsung and Xiaomi are sharing the video in the flagship phone
Maximum in general budget phone
4k recording
It happens
While cheap phones yet
1080p
They only give recordings
Recording resolution depends on your processor
8k
Recording at this time only
Snapdragon 865
And
Exynos 990
Holders of
The better your processor
You will be able to record videos with such a high resolution
That's why I keep saying that when you pick up a phone, you should prefer a phone with a good processor
Because your performance, camera, battery all depend on the processor
Well, besides Salomotion and
Night mode comes
They rely heavily on both camera and software
In good camera
There is also an option to take raw photos
So that in post processing you can improve it by editing
They were doing it all on camera
Now let's talk about secondary cameras
The following types of secondary cameras are currently being offered in mobiles
Telephoto camera
Depth camera
Wide angle camera
Camera time of flight
The most useless of these and often the camera given as a sticker is the depth sensor
While the wide angle is the camera
Which enlarges your frame
Or suppose your field of view increases
There is a telephoto zoom camera
2x, 5x
Telephoto lenses are coming
Remember there are two types of zoom
Digital zoom in which the quality deteriorates when the image is zoomed
It can happen in any mobile
Optical zoom is from hardware
In which the quality does not deteriorate
So far the best optical zoom in mobile has been given only five times followed by digital zoom
While the time of flight camera is a calculated depth camera
But it works in 3D and virtual reality
That is, if there is a table in front of you, you can measure the length of the table by opening the camera of the mobile
This camera is in high end phones
There was one important thing left about the display
A separate glass is fitted to protect the display
By the way, there are many companies that make protective glass
But the governing guerrilla glass is the most famous
There are several levels of guerrilla glass
More than everything
Running Gorilla Glass Five is the strongest
Guerrilla Glass 3 and 4 are also running on budget phones
In the next and last episode
User interface, RAM, ROM, battery, cooling and charging will be discussed
(to be continued)