The larger the sensor the more light the sensor captures yielding in better image quality.
35.9 x 24mm
Polaroid Snap: 81.2 x 25.4mm
23.9 x 36mm
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 a7 III: 3730ISO
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. image quality
A device's overall image quality score considers: color depth, dynamic range and low light performance. Source: DxOMark.
Sony Alpha 7R II: 98
8. 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
10. color depth
The better a device's color depth the more color nuances it can distinguish. Source: DxOMark.
HP Photosmart R927: 42bits
11. fastest shutter speed
A faster maximum shutter speed allows taking pictures of fast moving subjects without blur.
Sony Cyber-shot DSC-RX100 IV: 1/32000s
12. has a stereo microphone
A stereo microphone allows to record audio files or movies in stereo without an external microphone.
50% have it
13. Has phase detection autofocus for videos
A phase detection autofocus system is faster than a contrast detection autofocus system. Even when recording scenes with a lot of fast movements, the videos are sharp and clear.
12% have it
14. Has phase detection autofocus for photos
A phase detection autofocus is much faster than a contrast detection autofocus, allowing for sharper images.
The better the dynamic range the system captures a wider number of values from dark to light leading to more details in low and highlights. Source: DxOMark.
Nikon D810A: 14.8Evs
16. has built-in optical image stabilization
Optical image stabilization uses gyroscopic sensors to detect the vibrations of the camera. The lens adjusts the optical path accordingly, ensuring that any type of motion blur is corrected before the sensor captures the image.
46% have it
17. Is dustproof and water resistant
Dustproof/water resistant at depth equal to or greater than 1 meter.
9% have it
18. has AF tracking
With AF tracking, once you choose the subject and press the shutter release part way down, as the subject moves, the autofocus will follow it. No more out of focus shots.
72% have it
19. Has timelapse function
A timelapse shows a long passage of time sped up. A series of photographs taken from the same position over a long period is joined together to create a short video. It is great way to capture things like the setting sun, or clouds moving across the sky.
16% have it
20. has a built-in HDR mode
It can automatically shoot pictures with a higher dynamic range (HDR).
27% have it
21. has a 24p cinema mode
24p is a video format (24 frames per second) traditionally used in cinema. Nowadays, it is used to create film-like motion characteristics.