Panasonic Lumix DMC-CM1
Panasonic Lumix DC-TS7
You can operate the device easily, by pressing the screen with your fingers.
The bigger the screen size is, the better the user experience.
A flash is good for low-light environments, and can sometimes be used as flashlight.
With a higher light sensitivity (ISO level), the sensor absorbs more light. This can be used to capture moving objects using a fast shutter speed, or to take images in low light without using a flash.
Nikon D7500 + Nikon AF-S DX Nikkor 18-140mm f/3.5-5.6G ED VR
With a wider aperture the sensor can capture more light, helping to avoid blur by enabling a faster shutter speed. It also provides a shallow depth of field, allowing you to blur the background to focus attention on the subject.
Ricoh GR II
This allows to manually set the focus.
A raw image file contains minimally processed data from the image sensor. Raw files are so named because they are not yet processed and therefore are not ready to be printed or edited with a bitmap graphics editor.
A longer maximum focal length allows you to focus in on a small part of a scene, and offers a narrower angle of view than shorter focal lengths.
Nikon Coolpix P1000
1080 x 30fps
The maximum resolution available for videos shot with the main camera. Although it may be possible to choose among other frame rates, those recordings usually have lower resolutions.
2160 x 60fps
Samsung Galaxy NX Mirrorless + 18-55mm f/3.5-5.6
The battery can be recharged and used over again.
An indicator shows you when the device has low battery.
The device has a standard memory slot (such as an SD or micro SD card slot) so that you can either extend the internal storage with affordable memory modules or you can retrieve data, such as photographs, easily from a memory card.
An accelerometer is a sensor used to measure the linear acceleration of a device. A common application is detecting when a device changes between vertical and horizontal positions.
Newer USB versions are faster and have better power management.
A front camera, also called secondary camera, can be used for video chats/selfies.
The lens is made by a reputable photographic equipment manufacturer, as opposed to a low-cost unbranded lens.
Anyone is free to use, copy, study, and change the software in any way, and the source code is openly shared so that people are encouraged to voluntarily improve the design of the software.
It can be updated over the air (OTA) w/o connecting to a computer
With a large enough data plan, you could cancel your home internet and use the device as a hotspot.
The OS has a feature for tracking the position of a mobile device. This feature is particularly useful if your phone gets stolen or if you lose it.