The larger the sensor the more light the sensor captures yielding in better image quality.
23.6 x 15.8mm
Polaroid Snap: 81.2 x 25.4mm
3. focus points
The more focus points the more flexibility in picking which part of the scene to focus on. They also give the image sensor a better probability in identifying the right area of the scene to focus on in more automatic modes.
Sony Alpha a7 III: 693
4. continuous shooting at high resolution
Fast continuous shooting is useful for catching action shots.
Olympus OM-D E-M1 Mark II: 60fps
The maximum ISO at which the device still captures excellent quality images. Source: DxOMark.
Sony Alpha 7S: 3702ISO
6. maximum light sensitivity
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: 1640000 ISO
7. longer battery life
CIPA is an independent, standard measurement that determines how many shots a camera can take before the battery dies.
Nikon D3x: 4400shots
HTC Re: 65.5g
9. fastest shutter speed
A faster maximum shutter speed allows taking pictures of fast moving subjects without blur.
The bigger the screen size is, the better the user experience.
Samsung Galaxy Camera 2: 4.8"
18. has a flash
A flash is good for low-light environments, and can sometimes be used as flashlight.
86% have it
19. has a serial shot mode
You can shoot multiple pictures in a row.
88% have it
20. shoots raw
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.
57% have it
21. has a CMOS sensor
CMOS image sensors are slowly replacing CCD sensors, due to reduced power consumption and better image quality. They can be very compact and cost relatively little to produce.
69% have it
22. optical zoom
The zoom range is the ratio between the longest and shortest focal lengths. A higher zoom range means that the lens is more versatile.
Nikon Coolpix P900: 83.3x
23. widest aperture
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: f/1
24. Has a hot shoe
A hot shoe can be used to attach an external flash, as well as light meters, viewfinders, rangefinders and other attachments.