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[Article] cellphones and photography

Hi all!
All ok?!
I create this small text for a Brazilian Android Forum, called BrasilDroid, so I would put here in XDA too.
It is about the quality of our cellphones cameras and the quality of them.
A lot of definitions :
What is Photography ?
Literaly is write with light. The term is derived from Greek. photos(light) and graphos (drawing). So, the basic premise for take a picture is... Light!
What we need to take a photo?
For take a picture we need a camera with lens and film, that in digital photography is the camera sensor.
Pixel and Resolution
If we make a enlarge expansion in a photo we see various square points that make the image, this points are called Pixel. This is the minor measure that we have in our photos.
The photo resolution are directy connected to the Pixel. In a photo that have dimensions of 1920x1080 your resolution is 2,736,800 px or 2.1mpx.
Roughly, resolution is the photo area.
Quality vs Pixel
Many peoples confuse the camera quality with the amount of megapixel available.
But, quality not linked with quantity.
The Camera quality is linked direct to height of sensor and how the sensor handles the lack of light.
When we pont our camera for the scene and shoot a "curten" open and leave the sensor exposed to light. In this moment the sensor catch the light. Immediately after the "curten" close and the image is recorded.
While the obturator(the name of "curten") is open the sensor is capturing the light, so, smaller the area for capture minus details can be captured and more digital interference need to be used to create the image.
Let us consider two sensors:
Sensor 1 - 7x5mm.
Sensor 2 - 20x14mm.
These sensors be in two diferents cameras with 5mpx of resolution.
When we take a photo in 1920x1080 (Full HD) the sensor try capture the light of all scene usin 2.1 milions of points.
In First Sensor the pixel be very close, the area is smaller, making the size of these pixel be small, soon, the amount of detail that each of these pixels will be store are small.
In Second Sensor the pixels be more separated, the area is bigger, the pixels can capture mor information of the light.
The final image will be the same resolution in each sensors, but, the sensor two store more information. Considering the size of this sensors, Sensor two will store three times more information.
In other words, a small sensor need perform a big effort for store all information, are many pixels in a small area. This makes the camera need interfere in capture, generating small points between the pixels. In these moment we have other problem ... Grain...
So, for what serve the pixel ?
Enlarge.
The more megapixel used in a photo greater be your dimension, so, more we can enlarge the picture keeping the proportion without loose information.
Why the photos look better on cellphone than on the computer?
That we see in screen of cell is basically a photo in a lower resolution than the real resolution, these lower resolution hide photos imperfections and some LCDs can make a bigger shine or contrast in the photos, like the AMOLED.
How to take better photos with cell ?
1 - Don't use the max megapixel
If you are shoot with cell, certainly, be a big image don't is your objective, so, you can take photos in small resolution. In Cell with 5.0mpx take a picture with 3.2mpx only bring gain...
2 - ISO
If the camera have manual ISO, try to use the lower ISO number, the higher ISO more digital inteference, and more grain...
But, the low ISO makes the scene need more light.
3 - Prefer shooting statics objects or don't shake
Most of cellphones don't allows the manual configuration of Obturator Speed. The camera software try to choice the better speed for the scene.
The phone try balance the speed with ISO and aperture, many times the speed is going down. And slow speed is synonymous of blur photo.
How to get around this? If possible, increase the ISO or increase the exposure compensation. And let the phone as still as possible.
4 - Using flash
Flash, very polemic, but, in cell cameras can be a great ally.
When use the flash your light make that the scene freeze, reducing very much the slow speed problem.
Obvious, xeon flash is better than Led.
5 - Modify the pr proportion
Case the camera be proportion adjust try choice the best of each photo.
Proportion 4:3 = 1.333
Proportion 3:2 = 1.5
Proportion 16:9 = 1.77
To calculate the proportion just divide the bigger side by smaller.
Para calcular a proporção é só dividir o lado maior pelo lado menor.
A Photo with 2048x1536 px be : 2048 / 1536 ~= 1.333
So, the resolution 2048x1536 have proportion 4:3.
To improve the photos working with the proportion the best way is using photo's editors.
Size of Sensors:
Digital Cameras :
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(http://www.iif.com.br/site/2010/10/mitos-verdade-digital/)
Iphone and S3
(https://forum.lowyat.net/topic/2708421/+200)
They noted that the lower sensor of a digital camera 1/2.5 (0.4) is ~ 25% higher than the sensor of Galaxy S3 1/3.2 (0.31)?
Guys, it is clear that we can take great pictures with our cell phones, however, the limitation of the hardware and the sensor will always do that to that quality is not expected.
After all that, you imagine how absurd it is to have a mobile phone with 41mpx resolution?
A decent camera, that resolution costs over $ 20,000 and has a huge sensor, called medium format!
I propose a challenge. I take two pictures with my Ace 2. One with 5.0mpx and other with 3.2mpx. Both are in the ratio 4:3 with 100% Crop.
which of the photos was made ​​with 5.0mpx and what was done with 3.2mpx?
Photo one :
Photo two:
That is, questions, suggestions ... and let the discussion!
:laugh::good:

ELEPHONE P10C Review: 5.0" IPS qHD 7.0mm Ultrathin MTK6582 4-Core Android 4.4

Hello, everybody. This is my first thread. Although my English is poor, I really want to share my viewpoint with you. Please bear with me.
Basic specs:
Display: 5’’ IPS QHD 960x540
CPU: MTK6582 quad core 1.3GHz
GPU: OpenGL ES 2.0, Mali-400 MP2
RAM: 1GB
ROM: 8GB+MAX support 64GB Class 10 Micro SD Memory Card
Camera: 8mega-pixle main camera + 2mega-pixle front camera
Dimensions: 143 x 72 x 7 mm
OS: Android 4.4.2
Battery: Li-ion Battery 1950mAh
Price: $121.99
Unboxing:
The box is simple including two parts. There are USB cable, power charger, user’s manual and screen cover. These accessories all are necessary.
View attachment 2818114View attachment 2818115
Performance:
View attachment 2818118
Design:
It’s too thin that is my first impression when I saw it. The thickness is only 7mm so that we can put it into wallet. The USB jack and headphone jack is in the top. Maybe the headphone is a little small; it’s not easy insert the headphone. The frame is made of metal and we can find the power button and volume buttons on it. However, it is difficult to press these buttons down. The features of the back include main camera, dual LED light, logo and speaker. We can remove the rear cover to replace battery, SIM and Micro SD. It’s a great design to somebody who wishes to get long battery.
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Display:
5’’ IPS QHD 960x540 display. It is enough big to view video with 5 inch screen. However, the definition is disappointing because it’s only 960 x 540. Most of the IPS display is good at view angles. Of course, this display also is great at view angles. What’s more, the brightness is OK. We can see the text clearly even in high light. As for color reproduction, it’s amazing.
Camera:
There are four modes in camera including Panorama mode, Face beauty mode, Live Photo mode and Normal mode. In the Panorama mode, we can take many photos, and then combine with these photos to get a bigger photo. If we want to become more beautiful in photo, we should choose the Face beauty mode. The live photo mode is interesting. In this mode, we can get a live photo when take photos. We can adjust the white balance and ISO to adjust to different scene for better photos in normal mode.
View attachment 2818122View attachment 2818123View attachment 2818126
We review the phone in normal light and low light. The result is disappointing. Speed is slowly in normal light and the resolution is not enough. It’s worse in low light. The camera even can’t focus in low light and there are so many noisy points. The sample is dark when ISO is 400. And then we adjust the ISO to 800, the sample becomes light but more noisy points. It’s only praiseworthy that taking and saving photos is quickly.
View attachment 2818120View attachment 2818121
OS:
The ROM makes some improvements base on Android 4.4. It’s very smooth and concise on the whole. There are many beautiful wallpapers for choosing. Many interesting widgets are prepared for you to show your character. The interface of music player is succinct and tone quality is well. Besides, it’s very smooth when we watch video even we speed video. However, the phone became hot after watching video long time.
There are many useful pre-positioned apps such as Gmail, Maps, and Sound Recorder.
View attachment 2818127View attachment 2818129View attachment 2818131
Battery:
The thickness is too thin to the battery is only 1950mah. However, the screen resolution is low and MTK6582 is power saving, so you can charge it once a day even longer time.
Conclusion:
Elephone P10C is stand out at design and ROM, but the camera need to improve. In my opinion, the P10C is worth owning.

Not bad for the budget phone it's meant to be.

It's so powerful.
MissionImprobable said:
Not bad for the budget phone it's meant to be.
Click to expand...
Click to collapse
It's so powerful.:laugh::laugh::laugh:

What about the GPS?
Thank you!

I ordered one today for 109 USD + shipping 22 USD =131 USD. Can get back to you guys when I have tested the GPS and so on. WIll have it in 8-12 days

kamikado said:
What about the GPS?
Thank you!
Click to expand...
Click to collapse
GPS work not. Fix +- fast . Position hold not! Accuracy +- 5,10,50 m.

Le 1s outshines iPhone SE

Apple announced the iPhone SE and the web is going wild about it! The Verge says "The new iPhone SE finally makes a small phone feel powerful", TechRadar says that its "Small but mighty!" and The Telegraph calls it "Apple's secret weapon". Lots of superlatives are being thrown around, as is always the case with Apple products.
So, in the midst of Apple's reality distortion field, I decided to compare it to my Le 1s - that I've been using for more than a month now. The results, at least for me, are very conclusive.
LeEco Le 1s
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NETWORK Technology GSM / WCDMA / LTE
LAUNCH Announced 2015, October
Status Avaliable on Flipkart
BODY Dimensions 151.1 x 74.2 x 7.6 mm
Weight 170 g
SIM 1 Nano-SIM, 1 Micro-SIM
DISPLAY Type Incell IPS LCD, capacitive touchscreen
Size 5.5 inches (~75% screen-to-body ratio)
Resolution 1920 x 1080 pixels (Full HD)
PPI 401
Multitouch Yes
PLATFORM OS Android Lollipop
Chipset MediaTek Helio X10 Turbo, MTK6795T
CPU Octa-core 2.2 GHz ARM Cortex-A53 (64-bit)
GPU PowerVR G6200
MEMORY Card slot No
Internal 32 GB
CAMERA Primary 13 MP, f/2.0, PDAF Close-Loop, Single-LED Flash
Features 1/3.1" sensor size, geo-tagging, 4K video recording, auto-focus, manual-focus, digital zoom, face detection, HDR
Video [email protected], [email protected], [email protected], [email protected]
Secondary 5 MP, f/2.0, [email protected], face detection
SOUND Alert types Vibration, proprietary and custom ringtones
Loudspeaker Yes
3.5mm jack Yes
CONNECTIVITY WLAN Wi-Fi 802.11 a/b/g/n/ac, hotspot
Bluetooth v4.1, A2DP
GPS Yes, with GPS, A-GPS, GLONASS
NFC No
FM Radio No
USB Type-C Reversible
FEATURES Sensors Fingerprint, accelerometer, infrared, gravity, magneto, proximity, compass
Messaging SMS (threaded view), MMS, Email, Push Email
Browser HTML5 (Chrome)
Java Yes
- Active noise cancellation with dedicated mic
- Google Now natural language commands and dictation
- Google Drive and third-party cloud services
- TV-out MHL 2.0
- Maps
- Audio/video player/editor
- Organizer
- Document viewer/editor
- Photo viewer/editor
- Voice memo/dial/command
- Predictive text input
BATTERY Non-removable Li-Po 3000 mAh battery
Stand-by Up to 340 h (4G on dual SIM)
Talk time Up to 31.5 h
Music play Up to 50 h
MISC Colors Rose Gold, Silver
NFC No
FM Radio No
USB Type-C Reversible
FEATURES Sensors Fingerprint, accelerometer, infrared, gravity, magneto,
Messaging SMS (threaded view), MMS, Email, Push Email
Browser HTML5 (Chrome)
Java Yes
- Active noise cancellation with dedicated mic
- Google Now natural language commands and dictation
- Google Drive and third-party cloud services
- TV-out MHL 2.0
- Maps
- Audio/video player/editor
- Organizer
- Document viewer/editor
- Photo viewer/editor
- Voice memo/dial/command
- Predictive text input
BATTERY Non-removable Li-Po 3000 mAh battery
Stand-by Up to 340 h (4G on dual SIM)
Talk time Up to 31.5 h
Music play Up to 50 h
MISC Colors Rose Gold, Silver
*************************************
iPhone SE
GSM / CDMA / HSPA / EVDO / LTE
2016, March
Coming soon. Exp. release 2016, March 31
123.8 x 58.6 x 7.6 mm
113 g
Nano-SIM
LED-backlit IPS LCD, capacitive touchscreen
4.0 inches (~60.8% screen-to-body ratio)
640 x 1136 pixels
326
Yes
iOS 9.3
Apple A9
Dual-core 1.84 GHz Twister
PowerVR GT7600 (six-core graphics)
No
16/64 GB
12 MP, f/2.2, PDAF, Dual LED Flash
1/3" sensor size, geo-tagging, 4K video recording, touch focus, face detection, HDR
[email protected], [email protected]/60fps, [email protected], [email protected]
1.2 MP, f/2.4, [email protected], face detection, HDR, FaceTime over Wi-Fi or Cellular
Vibration, proprietary ringtones
Yes
Yes
Wi-Fi 802.11 a/b/g/n/ac, hotspot
v4.2, A2DP, LE
Yes, with A-GPS, GLONASS
Yes (Apple Pay only)
No
v2.0, reversible connector
Fingerprint, accelerometer, gyro, proximity, compass
iMessage, SMS (threaded view), MMS, Email, Push Email
HTML5 (Safari)
No
- Active noise cancellation with dedicated mic
- Siri natural language commands and dictation
- iCloud cloud service
- TV-out
- Maps
- Audio/video player/editor
- Organizer
- Document viewer/editor
- Photo viewer/editor
- Voice memo/dial/command
- Predictive text input
Non-removable Li-Po 1642 mAh battery
Up to 240 h (2G) / Up to 240 h (3G)
Up to 14 h (3G)
Up to 50 h
Space Gray, Silver, Gold, Rose Gold
Let's start with the OS. Android and iOS are now at-par on features, freely taking inspiration from each other and the perennial also-ran Windows Phone. However, if you've been using an Android phone, the move to iOS is jarring regardless of preparation. Trust me, having moved from a OnePlus 2 to an iPhone 6S, I know this better than most. If you're an iPhone user already, there is no discussion required. If you're an Android user, then I'd say "Don't even consider an iPhone!"
Moving on to design and build, the new iPhone is, in line with Apple's policy "thinner, smaller and lighter" than the Le 1s. However, the Le 1s has an astounding screen-to-body ratio of 75% that enables single-handed use and the phone doesn't feel too big. After all, within reason, bigger is always better! Both phones offer amazing build quality at their respective price points, so that's not really much of a contest.
On display, if you like smaller screens, the iPhone SE will appeal to you. But for someone who has used a 4+ inch screen device earlier, going back to a smaller display doesn't really work. In this respect, the Le 1s scores with its big but not too big display, and its helped by minimal bezels. Resolution-wise, its a no contest with the Full HD In-Cell display on the Le 1s ruling the roost with its fantastic color reproduction, great viewing angles and almost-zero bezels.
On connectivity, both the Le 1s and the iPhone SE are at par with each other on Wi-Fi and Network compatibilities, but the Le 1s scores with its dual-SIM capability.
When it comes to performance, I believe that specs are just one part of the game. Real-world performance is key. And in this area, despite having lesser amount of RAM than the Le 1s, the iPhone SE performs equally well due to better memory management in iOS versus Android. Its a straight tie!
Camera is another key feature where specs are just one part of the game with actual photo clarity being the key identifier. The iPhone SE uses the much-lauded camera module from the iPhone 6S, so its a given that photos will come out well. The Le 1s on the other hand had a few initial hiccups with photo clarity but they've since been resolved by OTA updates, so overall - its a good camera experience on both smartphones. The Le 1s scores in lowlight clarity and front-camera! Apple, for reasons that defy logic, went with a 1.2MP sensor on the front-camera. Now megapixels might not be everything, but with a 5MP sensor, the Le 1s handily beats the iPhone SE on selfies. Another reason is the smaller aperture size on Le 1s cameras – both front and rear (f2.0) compared to the iPhone SE which has f2.4 on the front camera and f2.2 on the rear camera – in photography parlance, smaller is referred to as “wider”. A wider aperture lets in more light which gives better photos in low-light and indoor situations, and gives you that beautiful blurred “out of focus” effect on wide shots.
With respect to sensors, the Le 1s has an infrared sensor to control home appliances that the iPhone doesn't. Everything else on this front is a tie.
Finally, the "essential spec" in today's world, battery! The Le 1s has almost double the battery capacity of the iPhone SE, with fast-charge built-in! While iOS has better power management than Android, the huge difference in capacity should result in longer standby times with the Le 1s!
Regardless of all technical specifications and performance comparisons, there will still be people convinced that an Apple product is the next best thing since sliced bread! So, to those people, here is a final nail in the coffin. Both the Le 1s and iPhone SE are good phones that do almost everything you can expect them to. Most importantly for a budget-conscious Indian, the Le 1s costs INR 10,999 while the iPhone SE starts at a whopping INR 39,000! That’s three times more expensive than the Le 1s!!! Case closed.

[Discussion] Why Honor View20 48MP camera superior than others?

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Smartphone photography has made tremendous progress in recent years, especially in camera sensors -- the soul of any digital camera. Camera sensors determine the clarity of your photos and how large you can scale them up. From 300,000 pixels many years ago, to today’s highest 48 million pixels, sensors have advanced at an astonishing speed, and smartphone cameras now rival even high-performance SLR cameras.
Sony IMX586 and Samsung GM1 are the only two 48-megapixel sensors in smartphones on the market today. Although both are technically 48MP sensors, their capabilities are not equal, as image quality depends not only on the number of pixels, but also how the pixels are arranged. When this is taken into account, Sony IMX586 has the edge, as it is able to transform its pixel structure to achieve true 48MP photography. On the other hand, Samsung GM1 behaves more like a 12MP sensor due to its less effective pixel arrangement.
To understand the difference, we need to understand how a sensor captures light and creates an image. There are millions of picture elements (pixels) on an image sensor. Pixels can detect the intensity of light, but they cannot distinguish colors. An image sensor without color filters can only produce black-and-white photos.
To produce color photos, the RGB color model is used – in which red, green and blue light are added together in various ways to reproduce a broad array of colors. One method is to put red, green, and blue filters in front of three image sensors respectively and combine the images to create one photo. But this is not practical for smartphones, as it makes the cameras very bulky and expensive.
In 1974, Bryce Bayer invented the Bayer filter which employs what is called the "Bayer Pattern," a checkerboard-like arrangement of red, green, and blue pixels on a square grid of photosensors. This pattern of filters is placed on top of a single image sensor to make each pixel respond to either red, green, or blue light, allowing digital cameras to capture vivid color images. Then, a computing process known as demosaicing converts the detected image to a single full-color image. Most digital image sensors use the Bayer filter today.
Both Sony and Samsung sensors use Bayer filter arrays to capture light and produce photos.
Traditional Bayer arrays use a 2x2 array (2 green, 1 blue and 1 red). The Sony IMX586 sensor uses the Quad Bayer color filter array, where adjacent 2x2 pixels are arranged in the same color, making high-sensitivity shooting possible. During low light shooting, the signals from the four adjacent pixels are added, raising the sensitivity to a level equivalent to that of 1.6 μm pixels (12 megapixels), resulting in bright, low noise images.
When shooting bright scenes, such as an outdoor environment during daytime, the built-in, original signal processing function performs array conversion (see diagram below), making it possible to obtain high-definition 48 effective megapixel images in real time. Thus, the Sony IMX586 can produce true 48MB photos.
Based upon the data revealed by Samsung, the GM1 sensor adopts a similar Quad Bayer color filter. But it lacks a conversion mechanism, so every 2x2 array can only recognize one color and output data together. As a result, while the Samsung GM1 sensor has 48 megapixels, it actually behaves like a 12-effective megapixel sensor. According to the specifications, the GM1 sensor can only support photo resolution up to 4000×3000, i.e. 12 megapixels.
The main difference between the Sony IMX586 and Samsung GM1 sensors is that the former can produce true 48-megapixel photos by transforming its pixel structure, while the latter lacks this capability. In the end, photos produced by the Sony IMX586 are superior, having higher resolution and clarity, and retaining more details even after zooming.

Nice info
But still, Quad Bayer to normal Bayer conversion isn't effective,
Sony sensor is better for 2x digital zoom with 12mp resolution, while Samsung will give a cropped 4mp

[Review] Honor 9A, my thoughts on Tripple camera.

I am provided this device as courtesy of Honor UK. I am going to express my thoughts and impression on Honor 9A. This is my personal and honest opinion of the device.
Before I jump to photography aspect of the Honor 9A I would like to discuses some other aspect of this device. some of features as follows:
1. 6.3”, 88.4% screen to body ratio full view 20:9 aspect ratio display of LCD panel. ( very computable to watch video contents.)
2. Magic ui 3.1 that is honor skin of android 10 out of the box. (latest operating system, many flagship of previous years are still on the list to upgrade to this)
3. 5000 amh battery (all day long battery) and ‘Ultra Power Saving Mode’ in case the device need to run longer in minimum power (12 hours on 5% battery power)
4. 3.5 mm headphone jack ( now we can use our favourite headphones)
5. FM radio without need of DATA ( Yeah!! Just need to plug in headphone to work as antenna)
6. Super comfortable hold and use, slim design with mate finish sides for strong grip.
7. Biometric and facial lock system along with traditional pin and pattern unlock system.
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Camera
Honor 9A comes with triple rear camera and a front selfie camera. Rear cameras are 13MP Main camera along with 5MP ultra wide angle and 2MP depth sensor camera. I will summarise these camera as average in general circumstances. However if you consider the price range of the device it is above average. It is known fact that Honor devices comes with awesome camera performance. This device in particular is not focused on the camera hardware section. Moreover it lacks many popular software features of Honor camera software. This does not mean it has bad camera but it feels weaker in comparison with other Honor Device. I will simply explain good and bad aspect of the camera in my opinion in few important aspect of photography.
General photography
Its simple basic camera very useful for armature mobile photographer. Simple and easy to use. Picture quality is good enough for general use such as social media post or keeping it for memory. Images has good amount of detail and clarity. Pictures are slightly over saturated so it appears vibrant. This is perfect for general users who don’t have much knowledge of post editing.
Portrait
This device is able to capture good portrait pictures. I would not consider this is above average. It has decent amount of background blur on portrait images. I was expecting more than this considering it has 2MP depth sensor lens. However I personally did find much benefit of having that extra lens. So the portrait images are acceptable. Moreover, it does some post processing that improves image quality.
Close up/macro
It is surprisingly good for close up photography. It’s 2MP depth sensor camera rally stands out when it comes to close up photography. There is also PRO mode section where we can manually control, focus, shutter speed, ISO and so on.
Video
Video quality is fine on this device. it is able to capture up to 1080P on 30 FPS. I personally like to take video with 60fps. It might disappoint some users who are not used to with video capturing cause 30fps requires good amount of balance on video capturing. 60 fps would be beneficial in such condition. However, when captured with good balance 1080p with 30fps is considered as good quality.
Light condition
This device takes good picture in good light condition. It may over or under expose on extreme highlight and shadow condition. Meaning if you take picture of a house at sunset it may darken entire house to bring light of sun set.
It has shown weakness in low light condition. Pictures contain some amount of grain at low light. It becomes very difficult to maintain quality in very poor light condition. Such as, darker room with table light. Having said that this is important to consider that this device is introduced as budget device and this level of low light quality need to be accepted as satisfactory.
Wide angle, this device has 5MP wide angle lens. Wide angle is very useful for landscape photography. When comes to landscape photography 5MP resolution is not that helpful. We would lose significant amount of details from image due to lower resolution. when using wide angle for close up images it produces good quality pictures. but majority use of wide angle is to capture more in single frame so higher resolution would surly benefit.
Negative
I have used Honor and Huawei device before so I am aware of some of revolutionary photography features of these devices. When comes to mobile phone photography I consider 3 things is must have Nightmode, portrait and light painting. Honor has decided to ditch these key photography features. Therefore I have come to conclusion that this device is not for serious photography. This might be true as this device is targeted to different demography that may not be much interested on top end photography features. If you are looking for device that is above average on photography than you should look for some other devices such as Honor9x pro, Honor 20 pro.
In summary, honor 9 A has various key features to meet your daily demand. Please read following great review of thee product my member of this community. If you are not into much into photography and just want a simple camera phone with simplified features than this device is for you. It is able to take good quality pictures ( main lens 1x) that does not need editing most of the time. User interface in the camera app is much simplified so it is suitable for entry level consumers.
Source: https://community.hihonor.com/uk/topicdetail/Honor-9a,-my-thoughts-on-Tripple-camera/topicId_23039/