[Lenovo P2 Guides, News, & Discussion] The WiTcH Er:
It is boring to always use the auto mode in camera so let's try the manual mode and have greater quality pictures, which is better than auto mode.

What is manual mode ?

Manual mode is one of the main settings on your camera, and it lets you manually control shutter speed, white balance, manual focus, and ISO in most. These three settings work together to control the how bright or dark your photo is (known as exposure), as well as change the overall look of the image.

What is ISO ?

In photography ISO measures the sensitivity of the image sensor. The same principles apply as in film photography – the lower the number the less sensitive your camera is to light and the finer the grain. Higher ISO settings are generally used in darker situations to get faster shutter speeds.

What is Shutter Speed ?

In photography, shutter speed or exposure time is the length of time when the film or digital sensor inside the camera is exposed to light, also when a camera's shutter is open when taking a photograph. The amount of light that reaches the film or image sensor is proportional to the exposure time.

What is White balancing ?

White balancing is a process in which a camera will attempt to detect the type of white light largely visible in different environments. This is typically utilized to account for different light sources (fluorescent, incandescent, etc.), as well as different weather types and times of day (overcast, sunny, sunset, etc.). White balance generally focuses on collecting the proper temperature of white light in a scene, which ranges from cold (blue-tinted) to warm (orange or gold-tinted).

This is one setting that is often best left on automatic settings, unless the viewfinder suggests that the automatic white balance is obviously wrong. Of note, RAW images will have to be manually white balanced in post-processing, as RAW shooting will not modify the white balance in-camera.

What is Manual Focus ?

Manual focus controls are a more recent and much-appreciated addition to the control suite of manual smartphone photographers. Most camera apps features a simple and intuitive circular slider which can be used to accurately set focus manually in lieu of the jumpier and imperfect auto-focus, something which is often exaggerated when trying to take photos of close subjects. If you want to take a closer pic of something very near try macro focus.

What is Manual exposure ?

manual exposure is a small supplement to ISO and shutter speed settings, and it is one of the rarer manual settings one will find in smartphone camera applications. If a combination of shutter speed and ISO produce an unsatisfying image, manual exposure is often offered as a way of tweaking the brightness of an image in-camera. It can quite easily be replaced by simply modifying brightness after taking the photo, but it can sometimes be more efficient to get the image right the first time.

What do we have in our Lenovo P2 :

I had Camera api2 activated and snap camera hdr+ and oneplus 5 camera apps.

Shutter speed

Minimum 0.68s maximum 1/96423s

ISO

Minimum 100 Maximum 19200

Verdict approximate values

In low light condition

Higher ISO [ 500 ~ 19200 aprx] + Higher shutter speed [0.68 ~ 1/200 aprx]

In heavy light condition

Lower ISO [below 500 aprx] + Lower shutter speed [1/200s ~ 1/96423s aprx]

Camera Api2 advantages

Raw image capture support

In depth manual mode control

Enable camera api2

https://xdaforums.com/lenovo-p2/themes/flashable-zip-activating-camera-api2-t3724207

Which app is best for manual mode?

? Snap camera HDR

https://www.google.co.in/search?q=Snap+camera+HDR+paid+apk&gws_rd=cr&dcr=0&ei=bXs-WuDaI4HEvQSYyLWQDQ [Google search result page, Cuz many getting confused about this app]

? Oneplus 5 camera

Download link https://xdaforums.com/lenovo-p2/themes/stable-oneplus-5-camera-t3709983

? Adobe Photoshop Lightroom CC

? Camera FV 5