The larger the sensor the more light the sensor captures yielding in better image quality.
20.7 x 13.8mm
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 a9: 693
4. continuous shooting at high resolution
Fast continuous shooting is useful for catching action shots.
Olympus OM-D E-M1 Mark II: 60fps
HTC Re: 65.5g
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.
The bigger the screen size is, the better the user experience.
Samsung Galaxy Camera 2: 4.8"
18. has a touch screen
You can operate the device easily, by pressing the screen with your fingers.
23% have it
19. Faster photo autofocus due to a phase detection autofocus when shooting pictures
A phase detection autofocus is much faster than a contrast detection autofocus and allows sharper images.
30% have it
20. Is a system camera
A system camera has lots of changeable parts such as lenses, flashes and other accessories. They offer greater flexibility than compact cameras.
45% have it
21. has a flash
A flash is good for low-light environments, and can sometimes be used as flashlight.
87% have it
22. more viewfinder coverage
With 100% coverage you can compose the image correctly when you capture the photo. With less than full coverage you may have to crop your photos afterwards to get them looking perfect.
Panasonic Lumix DC-G9: 100%
23. has a two-stage shutter
A two-stage shutter is good for taking photos like a pro; apply pressure to the button in order for the lens to focus, and then press it fully to capture the photograph.
53% have it
24. has an optical viewfinder
An optical viewfinder (or OVF) allows the photographer to compose a shot while seeing exactly what the lens sees. There is no time lag and they require no power - as opposed to electronic viewfinders which can drain battery life. They are also better in low light situations.
30% have it
25. has continuous autofocus when recording movies
When recording movies they stay focussed and sharp.